# Patent

## Title
2-(1H-indolylsulfanyl)-benzyl amine derivatives as SSRI

## Abstract

The present invention relates to 2-(1H-indolylsulfanyl)-benzyl amine derivatives of general formula (I):




and pharmaceutical compositions comprising the compounds useful as SSRIs.

## Background
This application is a §365(c) continuation of PCT International Application No. PCT/DK2004/000894, filed Dec. 21, 2004 on behalf of H. Lundbeck A/S, which claims the benefit of priority under 35 U.S.C. §119(e) of U.S. Provisional Application No. 60/532,593, filed Dec. 23, 2003 and claims the benefit of priority under 35 U.S.C. §119(a)-(d) of Danish Application No. PA200301923, filed Dec. 23, 2003, the contents of all of which are hereby incorporated by reference into the subject application.


FIELD OF THE INVENTION
The present invention relates to compounds which are serotonin reuptake inhibitors and preferably also norepinephrine reuptake inhibitors, and the medical use of such compounds, e.g. in the treatment of depression and anxiety, affective disorders, pain disorders, attention deficit hyperactivity disorder (ADHD) and stress urinary incontinence.
BACKGROUND OF THE INVENTION
The majority of currently available antidepressants can be classified in 3 classes:

    
    
        1) monoamine oxidase inhibitors (MAOIs),
        2) biogenic amine neurotransmitter [serotonin (5-HT), norepinephrine (NE) and dopamine (DA)] transporter reuptake blockers, and
        3) modulators, especially blockers of one or more of the 5-HT and/or NE receptors.
    
    


Since depression is associated with a relative deficiency of the biogenic amines, the use of 5-HT and/or NE-receptor blockers (i.e. 5-HT and or NE-antagonist's) have not proven very successful in the treatment of depression and anxiety and the preferred and currently most efficient treatments are based on the enhancement of 5-HT and/or NE neurotransmission by blocking their reuptake back from the synaptic cleft (Slattery, D. A. et al., “The evolution of antidepressant mechanisms”, fundamental and Clinical pharmacology, 2004, 18, 1-21; Schloss, P. et al, “new insights into the mechanism of antidepressant therapy”, Pharmacology and therapeutics, 2004, 102, 47-60).
For years monoamine reuptake inhibition has been studied for treatment of depression, i.e. in particular the monoamines serotonin (5-HT), norepinephrine (NE) and dopamine (DA).
Selective serotonin reuptake inhibitors (hereinafter referred to as SSRIs) have become first choice therapeutics in the treatment of depression, certain forms of anxiety and social phobias, because they generally are effective, well tolerated, and have a favourable safety profile compared to the classic tricyclic antidepressants. Drugs claimed to be SSRIs are for example fluoxetine, sertraline and paroxetine.
However, clinical studies on depression indicate that non-response to the known SSRIs is substantial, up to 30%. Another, often neglected, factor in antidepressant treatment is compliance, which has a rather profound effect on the patient's motivation to continue pharmacotherapy. First of all, there is generally a delay in therapeutic effect of the SSRIs. Sometimes symptoms even worsen during the first weeks of treatment. Secondly, sexual dysfunction is generally a side effect common to SSRIs. Without addressing these problems, real progress in the pharmacotherapy of depression and anxiety disorders is not likely to happen. Accordingly, there is a need for the development of compounds capable of improving the treatment of depression and other serotonin related diseases.
A newer strategy has been the development of dual re-uptake inhibitors, e.g., the combined effect of serotonin reuptake inhibition and norepinephrine (norepinephrine is also named noradrenaline, NA) reuptake inhibition on depression is explored in clinical studies of compounds such as Duloxetine (Wong, “Duloxetine (LY-248686): an inhibitor of serotonin and noradrenaline uptake and an antidepressant drug candidate”, Expert Opinion on Investigational Drugs, 1998, 7, 10, 1691-1699) and Venlafaxine (Khan-A et al, 30 “Venlafaxine in depressed outpatients”, Psychopharmacology Bulletin, 1991, 27, 141-144). Compounds having such duel effect are also named SNRIs, “serotonin and noradrenaline reuptake inhibitors”, or NSRIs, “noradrenaline and serotonin reuptake inhibitors”.
Since treatment with the selective NE reuptake inhibitor reboxetine has been shown to stimulate 5-HT neurons and mediate the release of 5-HT in the brain (Svensson, T. et al, J. Neural. Transmission, 2004, 111, 127) there might be a synergistic advantage using SNRI's in the treatment of depression or anxiety.
The use of SNRI's have been shown in clinical studies to have a beneficial effect on pain (e.g. Fibromyalgia syndrome, overall pain, back pain, shoulder pain, headache, pain while awake and during daily activities) and especially pain associated with depression (Berk, M. Expert Rev. Neurotherapeutics 2003, 3, 47-451; Fishbain, D. A., et al. “Evidence-based data from animal and human experimental studies on pain relief with antidepressants: A structured review” Pain Medicine 2000 1:310-316).
SNRI's have also been shown in clinical studies to have a beneficial effect in attention deficit hyperactivity disorder (ADHD) (N. M. Mukaddes; Venlafaxine in attention deficit hyperactivity disorder, European Neuropsychopharmacology, Volume 12, Supplement 3, October 2002, Page 421).
Furthermore, SNRI's have been shown to be effective for the treatment of stress urinary incontinence (Dmochowski R. R. et al. “Duloxetine versus placebo for the treatment of North American women with stress urinary incontinence”, Journal of Urology 2003, 170:4, 1259-1263.)
Furthermore, Axford L. et al. describe the development of triple 5-HT, NE and DA re-uptake inhibitors for treatment of depression. (2003, Bioorganic & Medical Chemistry Letters, 13, 3277-3280: “Bicyclo[2.2.1.]heptanes as novel triple re-uptake inhibitors for the treatment of depression”). Wellbutrin (bupropion) which has DA re-uptake activity in vitro and in vivo, show antidepressant efficacy. Other combination studies have indicated that addition of some affininity at the DA uptake site may have some clinical benefit (Nelson, J. C. J. Clin. Psychiatry 1998, 59, 65; Masand, P. S. et al. Depression Anxiety 1998, 7, 89; Bodkin, J. A et al. J. Clin. Psychiatry 1997, 58, 137).
The present invention provides 2-(1H-indolylsulfanyl)-benzyl amine derivatives, formula I, which are serotonin reuptake inhibitors. In particular, the invention provides compounds possessing the combined effect of serotonin reuptake inhibition and norepinephrine reuptake inhibition. Furthermore, some of the compounds are also triple 5-HT, NE and DA re-uptake inhibitors.
Diphenyl sulphides of formula (XVI) and variations thereof have been disclosed as serotonin re-uptake inhibitors and have been suggested for use in treatment of depression, cf. e.g. U.S. Pat. No. 5,095,039, U.S. Pat. No. 4,056,632, EP 396827 A1 and WO 9312080. EP 402097 describes halogen substituted diphenylsulfides claimed to be selective serotonin inhibitors for treatment of depression. Likewise WO 9717325 discloses derivatives of N,N-dimethyl-2-(arylthio)benzylamine claimed to be selective serotonin transport inhibitors and suggest their use as antidepressants. J. Jilek et al., 1989, Collect. Czeck Chem. Commun., 54, 3294-3338 also discloses various derivatives of diphenyl sulphides, “phenyl-thio-benzylamines” as antidepressants. Furthermore, diphenyl sulphides are also disclosed in U.S. Pat. No. 3,803,143 and claimed useful as antidepressant.




Several publications relates to the use of derivatives of diphenyl sulphides as “radiopharmaceuticals” for imaging SERT by SPECT or PET imaging, e.g. “S. Oya et al. J. Med Chem. 2002, 45, 4716-4723” and “S. Oya et al. J. Med. Chem. 42, 3, 333-335”. P. Emond et al (J. Med. Chem (2002) 45, 1253-1258) and “S. Oya et al. (J. Med. Chem. 42, 3, 333-335) further test and discuss substituted “diphenyl sulfides” as selective serotonin tranporter ligands relative to dopamine and norepinephrine transporters (DAT, NET) with measurements of vitro affinities at the dopamine, serotonin, and norepinephrine transporters.

WO 0066537 also discloses certain derivatives of diphenyl sulphides claimed to be have higher selectivity for SERT over NET and DAT.
U.S. Pat. No. 4,018,830 and U.S. Pat. No. 4,055,665 discloses “phenylthioaralkylamines” and “2-phenylthiobenzylamines” represented structurally as “Ar1-S-Ar2 in which Ar1 is a phenylakyl amine substituent and Ar2 is a substituted or unsubstituted homocyclic or heterocyclic ring of from 5-6 atoms, such as an aromatic ring, a heteroaromatic ring”. The compounds are claimed to be useful for preventing “cardiac arrhythmias”.
K. Sindelar et al., “Collection of Czechoslovak Chemical Communications, (1991), 56(2), 449-58, by K. Sindelar et al” disclose variations of compounds of formula (XVI) in which one of the rings is substituted with a thiophene ring with test for selectivity as 5-HT re-uptake inhibitor and NA re-uptake inhibitor, respectively, for use as antidepressants.
U.S. Pat. No. 6,596,741 B2 and U.S. Pat. No. 6,436,938 B1 and U.S. Pat. No. 6,410,736 B1 disclose biaryl ether derivates (XVII) reported to inhibit reuptake of monoamines, e.g. serotonin, dopamine and/or norepinephrine.




None of the above references disclose compounds comprising an indole group like the indolyl-sulfanyl benzyl amines of the present invention.

SUMMARY OF THE INVENTION
The present invention relates to a compound having the general formula I




wherein the sulphur atom is attached to the indole via any ring carbon of the indole and wherein R1-R13 are as defined below;

as the free base or a salt thereof.

In a further aspect the invention provides a compound of the above formula I according to the above as the free base or a pharmaceutical acceptable salt thereof for use as a medicament.
The invention also provides a pharmaceutical composition comprising a compound according to the above as the free base or a pharmaceutically acceptable salt thereof and at least one pharmaceutically acceptable carrier or diluent.
The invention further provides a method for the treatment of an affective disorder, such as depression, anxiety disorders including general anxiety disorder, social anxiety disorder, post traumatic stress disorder, obsessive compulsive disorder, panic disorder, panic attacks, specific phobias, social phobia or agoraphobia in a living animal body, including a human, comprising administering a therapeutically effective amount of a compound according to the above as the free base or a salt such as a pharmaceutically acceptable salt thereof. The invention furthermore concerns the use of a compound according to the above in a method of treatment of pain disorders, ADHD and stress urinary incontinence.
The invention further provides the use of a compound according to the above as the free base or a salt such as a pharmaceutically acceptable salt thereof for the preparation of a pharmaceutical composition for the treatment an affective disorder, such as depression, anxiety disorders including general anxiety disorder, social anxiety disorder, post traumatic stress disorder, obsessive compulsive disorder, panic disorder, panic attacks, specific phobias, social phobia or agoraphobia. The invention furthermore provides the use of a compound according to the above for the preparation of a pharmaceutical composition for the treatment of pain disorders, ADHD and stress urinary incontinence.


DETAILED DESCRIPTION OF THE INVENTION
Definitions
The term “halogen” means fluoro, chloro, bromo or iodo. “Halo” means halogen.
The expression “C1-6-alk(en/yn)yl” means a C1-6-alkyl, a C2-6-alkenyl or a C2-6-alkynyl group.
The term “C1-6 alkyl” refers to a branched or unbranched alkyl group having from one to six carbon atoms inclusive, including but not limited to methyl, ethyl, 1-propyl, 2-propyl, 1-butyl, 2-butyl, 2-methyl-2-propyl and 2-methyl-1-propyl. Similarly, the term “C1-4 alkyl” refers to a branched or unbranched alkyl group having from one to six carbon atoms inclusive, including but not limited to methyl, ethyl, 1-propyl, 2-propyl, 1-butyl, 2-butyl, 2-methyl-2-propyl and 2-methyl-1-propyl.
The term “C2-6 alkenyl” designate such groups having from two to six carbon atoms, including one double bond, including but not limited to ethenyl, propenyl, and butenyl.
The term “C2-6 alkynyl” designate such groups having from two to six carbon atoms, including one triple bond, including but not limited to ethynyl, propynyl and butynyl.
The expression “C3-8-cycloalk(en)yl” means a C3-8-cycloalkyl or a C3-8-cycloalkenyl group. The term “C3-8-cycloalkyl” designates a monocyclic or bicyclic carbocycle having three to eight C-atoms, including but not limited to cyclopropyl, cyclopentyl, and cyclohexyl. The term “C3-8-cycloalkenyl” designates a monocyclic or bicyclic carbocycle having three to eight C-atoms and one double bond, including but not limited to cyclopropenyl, cyclopentenyl and cyclohexenyl.
In the expression “C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl”, the terms “C3-8-cycloalk(en)yl” and “C1-6-alk(en/yn)yl” are as defined above.
The term “C1-6-alk(en/yn)yloxy” refers to groups of the formula C1-6-alk(en/yn)yl-O—, wherein C1-6-alk(en/yn)yl are as defined above.
The terms “C1-6-alk(en/yn)yl-carbonyl”, “C1-6-alk(en/yn)yl-aminocarbonyl” and “di-(C1-6-alk(en/yn)yl)aminocarbonyl” refers to groups of formula C1-6-alk(en/yn)yl-CO—, C1-6-alk(en/yn)yl-NH—CO— and (C1-6-alk(en/yn)yl)2—N—CO—, respectively, wherein C1-6-alk(en/yn)yl are as defined above.
In the expressions “C1-6-alk(en/yn)yl-amino”, “di-(C1-6-alkyl)amino”, “C1-6-alk(en/yn)ylthio”, “halo-C1-6-alk(en/yn)yl”, “halo-C1-6-alk(en/yn)yl-sulfonyl”, “halo-C1-6-alk(en/yn)yl-sulfanyl”, “C1-6-alk(en/yn)ylsulfonyl”, and “C1-6-alk(en/yn)ylsulfanyl” etc., the terms “C1-6-alk(en/yn)yl” and “halo” are as defined above.
The expression “R1 and R2 together with the nitrogen form a 4-7 membered ring containing zero or one double bond, optionally said ring in addition to said nitrogen comprises one further heteroatom selected from nitrogen, oxygen and sulphur” refers to a heterocylic rings system of a total of 4, 5, 6 or 7 members, such as, e.g. azetidine, pyrolidine, piperidine, piperazine, homopiperazine or morpholine. This rings system may be unsubstituted or it may comprise one or more substituents, such as, e.g. a maximum of one or two substituents, e.g. selected from the group consisting halogen, hydroxy, C1-6-alkyl, C1-6-alkoxy, C1-6-alkylthio, alkylsulphonyl, trifluoromethyl, trifluoromethylsulfonyl, and C1-6-alkylcarbonyl.
The atoms of the indole are numbered according to IUPAC Commision on Nomenclature of Organic Chemistry guidelines (Rigaudy, J.; Klesney, S. P. Nomenclature of Organic Chemistry Pergamon Press, (1979) ISBN 0080223699).
The term “treatment” as used herein in connection with a disease or disorders includes also prevention as the case may be.
Compounds of the Invention
The present invention relates to a compound having the general formula I




wherein the sulphur atom is attached to the indole via any ring carbon of the indole and wherein

    
    
        R1-R2 are independently selected from hydrogen, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl, and C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl or R1 and R2 together with the nitrogen form a 4-7 membered ring containing zero or one double bond, optionally said ring in addition to said nitrogen comprises one further heteroatom selected from nitrogen, oxygen and sulphur;
        R3-R12 are independently selected from hydrogen, halogen, cyano, nitro, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl, C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl, amino, C1-6-alk(en/yn)ylamino, di-(C1-6-alk(en/yn)yl)amino, C1-6-alk(en/yn)ylcarbonyl, aminocarbonyl, C1-6-alk(en/yn)ylaminocarbonyl, di-(C1-6-alk(en/yn)yl)am inocarbonyl, hydroxy, C1-6-alk(en/yn)yloxy, C1-6-alk(en/yn)ylthio, halo-C1-6-alk(en/yn)yl, halo-C1-6-alk(en/yn)ylsulfonyl, halo-C1-6-alk(en/yn)ylsulfanyl and C1-6-alk(en/yn)ylsulfonyl;

and

        R13 is selected from hydrogen, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl and C3-8-Cycloalk(en)yl-C1-6-alk(en/yn)yl;

as the free base or a salt thereof;

with the provisos that:

        when the sulphur atom is attached via atom nr. 2 of the indole then R7 does not exist;
        when the sulphur atom is attached via atom nr. 3 of the indole then R12 does not exist;
        when the sulphur atom is attached via atom nr. 4 of the indole then R8 does not exist;
        when the sulphur atom is attached via atom nr. 5 of the indole then R9 does not exist;
        when the sulphur atom is attached via atom nr. 6 of the indole then R10 does not exist;

and

        when the sulphur atom is attached via atom nr. 7 of the indole then R11 does not exist.
    
    


To further illustrate the invention, without limitation, the following embodiments of R1-R2 are within the scope of the invention, in particular for the compounds of the invention as the free base and the salts thereof:

    R1-R2 are independently selected from hydrogen, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl and C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl;
    R1-R2 are independently selected from hydrogen and C1-6-alkyl;
    R1-R2 are independently selected from hydrogen and C1-4-alkyl;
    R1 is hydrogen and R2 is methyl;
    R1 and R2 are methyl;
    R1 and R2 are hydrogen.


To further illustrate the invention, without limitation, the following embodiments of R1-R2 are within the scope of the invention, in particular for the compounds of the invention as the free base and the salts thereof:

    R1-R2 are independently selected from hydrogen and C1-6-alk(en/yn)yl; or R1 and R2 together with the nitrogen form a 4-7 membered ring containing zero or one double bond, optionally the ring in addition to the nitrogen comprises one further heteroatom selected from nitrogen, oxygen and sulphur.


To further illustrate the invention, without limitation, the following embodiments of R1-R2 are also within the scope of the invention, in particular for the compounds of the invention as the free base and the salts thereof:

    R1 and R2 together with the nitrogen form a 4-7, i.e. including 5 or 6, membered ring containing zero or one double bond, optionally said ring in addition to said nitrogen comprises one further heteroatom selected from nitrogen, oxygen and sulphur, which ring system is unsubstituted;
    R1 and R2 together with the nitrogen form a 4-7, including 5 or 6, membered ring containing zero or one double bond, optionally said ring in addition to said nitrogen comprises one further heteroatom selected from nitrogen, oxygen and sulphur, which ring system comprises one or more substituents, such as, e.g. a maximum of one or two substituents, e.g. selected from the group consisting of hydroxy, C1-6-alkyl (e.g. methyl), halogen (e.g. fluoro or chloro), C1-6-alkoxy (e.g. methoxy), C1-6-alkylthio, alkylsulphonyl, trifluoromethyl, trifluoromethylsulfonyl and C1-6-alkylcarbonyl;
    R1 and R2 together with the nitrogen form a ring selected from the group consisting of azetidine, pyrolidine, piperidine, piperazine, homopiperazine or morpholine, which ring may be unsubstituted or it may comprise one or more substituents, such as, e.g. a maximum of one or two substituents, e.g. selected from the group consisting of hydroxy, C1-6-alkyl (e.g. methyl), halogen (e.g. fluoro or chloro), C1-6-alkoxy (e.g. methoxy), C1-6-alkylthio, alkylsulphonyl, trifluoromethyl, trifluoromethylsulfonyl and C1-6-alkylcarbonyl.


To further illustrate the invention, without limitation, the following embodiments of R3-R12 are within the scope of the invention, in particular for the compounds as the free base or salt thereof:

    R3-R12 are independently selected from hydrogen, halogen, cyano, C1-6-alkyl, C3-8-cycloalkyl, C3-8-cycloalkyl-C1-6-alkyl, C1-6-alkyloxy, C1-6-alkylthio and trifluoromethyl;
    R3-R12 are independently selected from hydrogen, chloro, fluoro, cyano, methyl, methoxy, methylthio and trifluoromethyl;
    R3-R12 are hydrogen;
    R3-R12 are independently selected from hydrogen and halogen;
    R3-R12 are independently selected from hydrogen, chloro and fluoro;
    R3-R12 are independently selected from hydrogen and chloro;
    R3-R12 are independently selected from hydrogen and fluoro;
    at least one of R3-R12 is fluoro or chloro;
    R3-R12 are selected independently from hydrogen and cyano;
    R3-R12 are selected independently from hydrogen and C1-6-alk(en/yn)yl;
    R3-R12 are selected independently from hydrogen and C1-6-alkyl, such as methyl;
    R3-R12 are selected independently from hydrogen and C1-4-alk(en/yn)yloxy, preferably C1-6-alkoxy, such as methoxy;
    R3-R12 are selected independently from hydrogen and C1-6-alkylthio, such as methylthio;
    R3-R12 are selected independently from hydrogen and trifluoromethyl.


Within the invention, are embodiments where:

    a limited number of R3-R12 are different from hydrogen, e.g. at least 3, or at least 5 or at least 6 of R3-R12 are hydrogen;
    all of R3-R12 are hydrogen;
    only 1, 2, 3 or 4 of R3-R12 is different from hydrogen.


In one embodiment of the invention only 1, 2 or 3 of R3-R12 are different from hydrogen, preferably selected independently from the group consisting of hydrogen, chloro, fluoro, cyano, methyl, methoxy, methylthio and trifluoromethyl.
To further illustrate the invention, without limitation, the following embodiments of R3-R12 are within the scope of the invention, in particular for the compounds as the free base or salt thereof:

    R3-R12 are independently selected from hydrogen, halogen, cyano, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl, C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl, hydroxy, C1-6-alk(en/yn)yloxy and halo-C1-6-alk(en/yn)yl;
    R3-R12 are independently selected from hydrogen, halogen, cyano, C1-6-alk(en/yn)yl, hydroxy, C1-6-alk(en/yn)yloxy and halo-C1-6-alk(en/yn)yl;
    one of R3-R12 is halogen such as chloro or bromo or iodo or fluoro;
    one of R3-R12 is cyano;
    one of R3-R12 is C1-6-alk(en/yn)yl, such as C1-6-alkyl, e.g. methyl or ethyl;
    one of R3-R12 is hydroxy;
    one of R3-R12 is C1-6-alk(en/yn)yloxy, such as C1-6-alkyloxy, e.g. methoxy;
    one of R3-R12 is halo-C1-6-alk(en/yn)yl such as halo-C1-6-alkyl, e.g. trifluoro-methyl.


Within the invention, are embodiments where:

    one of R3-R12 is different from hydrogen;
    two of R3-R12 are different from hydrogen;
    three of R3-R12 are different from hydrogen;
    four of R3-R12 are different from hydrogen.


To further illustrate the invention, without limitation, the following embodiments of R3-R6 are within the scope of the invention, in particular for the compounds as the free base or salt thereof:

    R3-R6 are independently selected from hydrogen, halogen, cyano, nitro, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl, C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl, amino, C1-6-alk(en/yn)ylamino, di-(C1-6-alk(en/yn)yl)amino, C1-6-alk(en/yn)ylcarbonyl, aminocarbonyl, C1-6-alk(en/yn)ylaminocarbonyl, di-(C1-6-alk(en)yl)aminocarbonyl, hydroxy, C1-6-alk(en/yn)yloxy, C1-6-alk(en/yn)ylthio, halo-C1-6-alk(en/yn)yl, halo-C1-6-alk(en/yn)ylsulfonyl, halo-C1-6-alk(en/yn)ylsulfanyl and C1-6-alk(en/yn)ylsulfonyl;
    R3-R6 are independently selected from hydrogen, halogen, cyano, C16-alkyl, C3-8-cycloalkyl, C3-8-cycloalkyl-C1-6-alkyl, amino, C1-6-alkylamino, di-(C1-6-alkyl)amino, C1-6-alkylcarbonyl, aminocarbonyl, C1-6-alkylaminocarbonyl, di-(C1-6-alkylamino)carbonyl, hydroxy, C1-6-alkoxy, C1-6-alkylthio, halo-C1-6-alkyl, halo-C1-6-alkylsulfonyl, halo-C1-6-alkylsulfanyl and C1-6-alkylsulfonyl;
    R3-R6 are independently selected from hydrogen, halogen, C1-6-alkyloxy and C1-6-alkyl;
    R3-R6 are independently selected from hydrogen, halogen, methoxy and methyl;
    R3-R6 are independently selected from hydrogen, fluoro, chloro, methoxy and methyl.


Within the invention, are embodiments where a limited number of R3-R6 are different from hydrogen, e.g.:

    only one or two of R3-R6 is different from hydrogen;
    three of R3-R6 are hydrogen and one of R3-R6 is halogen;
    three of R3-R6 are hydrogen and one of R3-R6 is methyl;
    R4 is different from hydrogen;
    R5 is different from hydrogen;
    R4 is different from hydrogen, e.g. chloro, fluoro, methyl or methoxy, and the rest of R3-R6 is hydrogen;
    R5 is different from hydrogen, e.g. chloro, fluoro, methyl or methoxy, and the rest of R3-R6 is hydrogen;
    only one of R3-R6 is different from hydrogen and is selected from the group consisting of fluoro, chloro, methyl and methoxy;
    R3-R6 are hydrogen.


To further illustrate the invention, without limitation, the following embodiments of R3-R6 are within the scope of the invention, in particular for the compounds as the free base or salt thereof:

    R3-R6 are independently selected from hydrogen, halogen, cyano, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl and C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl;
    R3-R6 are independently selected from hydrogen, halogen and C1-6-alk(en/yn)yl;
    R3 is hydrogen;
    R4 is selected from hydrogen, halogen and C1-6-alk(en/yn)yl;
    R4 is hydrogen;
    R4 is halogen such as chloro or fluoro;
    R4 is C1-6-alk(en/yn)yl such as C1-6-alkyl e.g. methyl;
    R5 is selected from hydrogen and halogen;
    R5 is hydrogen;
    R5 is halogen such as chloro;
    R6 is hydrogen.


To further illustrate the invention, without limitation, the following embodiments of R7-R12 are within the scope of the invention, in particular for the compounds as the free base or salt thereof:

    R7-R12 are independently selected from hydrogen, halogen, cyano, nitro, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl, C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl, amino, C1-6-alk(en/yn)ylamino, di-(C1-6-alk(en/yn)yl)amino, C1-6-alk(en/yn)ylcarbonyl, aminocarbonyl, C1-6-alk(en/yn)ylaminocarbonyl, di-(C1-6-alk(en)yl)aminocarbonyl, hydroxy, C1-6-alk(en/yn)yloxy, C1-6-alk(en/yn)ylthio, halo-C1-6-alk(en/yn)yl, halo-C1-6-alk(en/yn)ylsulfonyl, halo-C1-6-alk(en/yn)ylsulfanyl and C1-6-alk(en/yn)ylsulfonyl.


Within the invention, are embodiments where a limited number of R7-R12 are different from hydrogen, e.g.:

    only one or two of R7-R12 is different from hydrogen;
    only one of R7-R12 is different from hydrogen and the substituent is selected from the group consisting of hydrogen, methyl, fluoro, chloro or methoxy;
    only two of R7-R12 is different from hydrogen and the substituents are selected independently from the group consisting of hydrogen, methyl, fluoro, chloro or methoxy.


To further illustrate the, invention, without limitation, the following embodiments of R7-R12 are within the scope of the invention, in particular for the compounds as the free base or salt thereof:

    R7-R12 are independently selected from hydrogen, halogen, cyano, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl, C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl, hydroxy, C1-6-alk(en/yn)yloxy and halo-C1-6-alk(en/yn)yl;
    R7-R12 are independently selected from hydrogen, halogen, cyano, C1-6-alk(en/yn)yl, hydroxy, C1-6-alk(en/yn)yloxy and halo-C1-6-alk(en/yn)yl;
    R7is selected from hydrogen and C1-6-alk(en/yn)yl;
    R7is C1-6-alk(en/yn)yl such as C1-6-alkyl;
    R8 is selected from hydrogen, halogen, cyano, C1-6-alk(en/yn)yl, hydroxy and C1-6-alk(en/yn)yloxy;
    R8 is hydrogen;
    R8 is halogen such as fluoro, chloro or bromo;
    R8is cyano;
    R8 is C1-6-alk(en/yn)yl such as C1-6-alkyl e.g. methyl;
    R8 is hydroxy;
    R8 is C1-6-alk(en/yn)yloxy such as C1-6-alkyloxy e.g. methoxy;
    R9 is selected from hydrogen, halogen, cyano, C1-6-alk(en/yn)yl, hydroxy and C1-6-alk(en/yn)yloxy;
    R9 is hydrogen;
    R9 is halogen such as fluoro, chloro, iodo or bromo;
    R9 is cyano;
    R9 is C1-6-alk(en/yn)yl such as C1-6-alkyl e.g. methyl;
    R9 is hydroxy;
    R9 is C1-6-alk(en/yn)yloxy such as C1-6-alkyloxy e.g. methoxy;
    R10 is selected from hydrogen, halogen, cyano, C1-6-alk(en/yn)yl, hydroxy, C1-6-alk(en/yn)yloxy and halo-C1-6-alk(en/yn)yl;
    R10 is hydrogen;
    R10 is halogen such as fluoro, chloro or bromo;
    R10 is cyano;
    R10 is C1-6-alk(en/yn)yl such as C1-6-alkyl e.g. methyl;
    R10 is hydroxy;
    R10 is C1-6-alk(en/yn)yloxy such as C1-6-alkyloxy e.g. methoxy;
    R10 is halo-C1-6-alk(en/yn)yl such as halo-C1-6-alkyl e.g. trifluoro-methyl;
    R11 is selected from hydrogen, halogen, C1-6-alk(en/yn)yl and C1-6-alk(en/yn)yloxy;
    R11 is hydrogen;
    R11 is halogen such as fluoro or chloro;
    R11 is C1-6-alk(en/yn)yl such as C1-6-alkyl e.g. methyl or ethyl;
    R11 is C1-6-alk(en/yn)yloxy such as C1-6-alkyloxy e.g. methoxy;
    R12 is selected from hydrogen and C1-6-alk(en/yn)yl;
    R12 is hydrogen;
    R12 is C1-6-alk(en/yn)yl such as C1-6-alkyl e.g. methyl.


To further illustrate the invention, without limitation, the following embodiments of R7 are within the scope of the invention, in particular for the compounds as the free base or salt thereof:

    R7 is hydrogen;
    R7 is methyl.


To further illustrate the invention, without limitation, the following embodiments of R13 is within the scope of the invention, in particular for the compounds as the free base or salt thereof:

    R13 is selected from hydrogen and C1-6-alk(en/yn)yl;
    R13 is hydrogen;
    R13 is C1-6-alk(en/yn)yl such as C1-6-alkyl e.g. methyl.


The above embodiments relates to the compounds of the invention having formula I
In particular, the present invention relates to a compound having the general formula I wherein the sulphur atom is attached to the indole as indicated in below formulas IA to IF:




and wherein R1-R13 are as defined herein, in particular wherein

    
    
        R1-R2 are independently selected from hydrogen, C1-6-alk(en/yn)yl (e.g. methyl), C3-8-cycloalk(en)yl, C3-8-cycloalkyl-C1-6-alkyl, or R1 and R2 together with the nitrogen form a 4-7 membered ring containing zero or one double bond, optionally the ring in addition to the nitrogen comprises one further heteroatom selected from nitrogen, oxygen and sulphur;
        R3-R12 are independently selected from hydrogen, halogen (e.g. fluoro or chloro), cyano, nitro, C1-6-alk(en/yn)yl (e.g. C1-6-alkyl, such as methyl), C3-8-cycloalk(en)yl (e.g. C3-8-cycloalkyl), C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl (e.g. C3-8-cycloalkyl-C1-6-alkyl), amino, C1-6-alk(en/yn)ylamino (e.g. C1-6-alkylamino), di-(C1-6-alk(en/yn)yl)amino (e.g. di-(C1-6-alkyl)amino), C1-6-alk(en/yn)ylcarbonyl (e.g. C1-6-alkylcarbonyl), aminocarbonyl, C1-6-alk(en/yn)ylaminocarbonyl (e.g. C1-6-alkylaminocarbonyl), di-(C1-6-alk(en)yl)aminocarbonyl (e.g. di-(C1-6-alkyl)aminocarbonyl)), hydroxy, C1-6-alk(en/yn)yloxy (e.g. C1-6-alkoxy; such as methoxy), C1-6-alk(en/yn)ylthio (e.g. C1-6-alkylthio, such as methylthio), halo-C1-6-alk(en/yn)yl (e.g., halo-C1-6-alkyl, such as trifluoromethyl), halo-C1-6-alk(en/yn)ylsulfonyl (e.g. trifluoromethylsulfonyl), halo-C1-6-alk(en/yn)ylsulfanyl (e.g. trifluoromethylsulfanyl), and C1-6-alk(en/yn)ylsulfonyl (e.g. C1-6-alkylsulfonyl);
        R13 is selected from hydrogen, C1-6-alk(en/yn)yl (e.g. C1-6-alkyl, such as methyl), C3-8-cycloalk(en)yl (e.g. C3-8-cycloalkyl), and C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl (e.g. C3-8-cycloalkyl-C1-6-alkyl);

as the free base or a salt thereof.

    
    


A preferred embodiment relates to the compounds of the invention having formula IA. Any of the above embodiments are also embodiments of formula IA with the proviso that R12 does not exist in compounds of general formula IA. Another embodiment relates to the compounds of the invention which are not of formula IA.
A further embodiment relates to the compounds of the invention having formula IB. Any of the above embodiments are also embodiments of formula IB with the proviso that R7 does not exist in compounds of general formula IB. Another embodiment relates to the compounds of the invention which are not of formula IB.
A further embodiment relates to the compounds of the invention having formula IC. Any of the above embodiments are also embodiments of formula IC with the proviso that R8 does not exist in compounds of general formula IC. Another embodiment relates to the compounds of the invention which are not of formula IC.
A further embodiment relates to the compounds of the invention having formula ID. Any of the above embodiments are also embodiments of formula ID with the proviso that R9 does not exist in compounds of general formula ID. Another embodiment relates to the compounds of the invention which are not of formula ID.
A further embodiment relates to the compounds of the invention having formula IE. Any of the above embodiments are also embodiments of formula IE with the proviso that R10 does not exist in compounds of general formula IE. Another embodiment relates to the compounds of the invention which are not of formula IE.
A further embodiment relates to the compounds of the invention having formula IF. Any of the above embodiments are also embodiments of formula IF with the proviso that R11 does not exist in compounds of general formula IF. Another embodiment relates to the compounds of the invention which are not of formula IF.
To further illustrate the invention, without limitation, the following embodiments of formula IA are within the scope of the invention, in particular for the compounds as the free base or salt thereof: R8-R11 are independently selected from hydrogen, halogen, cyano, C1-6-alkyl, C3-8-cycloalkyl, C3-8-cycloalkyl-C1-6-alkyl, amino, C1-6-alkylamino, di-(C1-6-alkyl)amino, C1-6-alkylcarbonyl, aminocarbonyl, C1-6-alkylaminocarbonyl, di-(C1-6-alkylamino)carbonyl, hydroxy, C1-6-alkoxy, C1-6-alkylthio, halo-C1-6-alkyl, halo-C1-6-alkylsulfonyl, halo-C1-6-alkylsulfanyl, and C1-6-alkylsulfonyl;

    R8-R11 are independently selected from hydrogen, halogen, cyano, methyl, hydroxy, methoxy and trifluoromethyl;
    R8-R11 are independently selected from hydrogen, halogen, methyl and methoxy;
    R8-R11 are independently selected from hydrogen, fluoro, chloro, methyl and methoxy.


Within the invention, are embodiments where a limited number of R8-R11 are different from hydrogen, e.g.:

    only one of R8-R11 is different from hydrogen and preferably selected from the group consisting of hydrogen, fluoro, chloro, methyl and methoxy, while rest of R8-R11 are hydrogen;
    two of R8-11 are different from hydrogen and preferably selected from the group consisting of hydrogen, fluoro, chloro, methyl and methoxy while and two of R8-11 are hydrogen.


To further illustrate the invention, without limitation, the following embodiments of formula IA are within the scope of the invention, in particular for the compounds as the free base or salt thereof:

    R8 is selected from the group consisting of halogen (preferably fluoro or chloro), methyl and methoxy and R7 and R9-11 are hydrogen;
    R9 is selected from the group consisting of halogen (preferably fluoro or chloro), methyl and methoxy and R7, R8 and R10-11 are hydrogen.


To further illustrate the invention, without limitation, the following embodiments of formula IA are within the scope of the invention, in particular for the compounds as the free base or salt thereof: only one of R8-11 is different from hydrogen and is selected from the group consisting of halogen (e.g. fluoro or chloro), methyl, methoxy, hydroxy and cyano.
To further illustrate the invention, without limitation, the following embodiments of formula IA are within the scope of the invention, in particular for the compounds as the free base or salt thereof:

    R8 is hydroxy; R8 is methoxy; R8 is methyl; R8 is cyano; R8 is chloro; R8 is fluoro; in a preferred embodiment, the rest of R8 to R11 are hydrogen.


To further illustrate the invention, without limitation, the following embodiments of formula IA are within the scope of the invention, in particular for the compounds as the free base or salt thereof:

    R9 is fluoro; R9 is chloro; R9 is bromo; R9 is iodo; R9 is methoxy; R9 is methyl; R9 is hydroxy; in a preferred embodiment, the rest of R8 to R11 are hydrogen.


To further illustrate the invention, without limitation, the following embodiments of formula IA are within the scope of the invention, in particular for the compounds as the free base or salt thereof:

    R10 is fluoro; R10 is chloro; R10 is bromo; R10 is methyl; R10 is cyano; R10 is CF3; R10 is methoxy; in a preferred embodiment, the rest of R8 to R11 are hydrogen.


To further illustrate the invention, without limitation, the following embodiments of formula IA are within the scope of the invention, in particular for the compounds as the free base or salt thereof:

    R11 is methyl; R11 is ethyl; R11 is methoxy; R11 is chloro; R11 is fluoro; in a preferred embodiment, the rest of R8 to R11 are hydrogen.


To further illustrate the invention, without limitation, the following embodiments of formula IA are within the scope of the invention, in particular for the compounds as the free base or salt thereof: R10 and R11 are selected independently from the group consisting of hydrogen, methyl, fluoro and chloride.
To further illustrate the invention, without limitation, the following embodiments of R13 are within the scope of the invention, in particular for the compounds as the free base or salt thereof:

    R13 is hydrogen;
    R13 is C1-6-alkyl;
    R13 is C1-4-alkyl;
    R13 is methyl.


One embodiment, relates to compounds of formula IA, wherein R13 is hydrogen or a C1-6-alkyl, e.g. a C1-4-alkyl, such as methyl and where R1-R11 are as defined herein.
To further illustrate the invention, without limitation, the following embodiment are within the scope of the invention, in particular for the compounds as the free base or salt thereof: the compound has the formula IA where R1 is hydrogen, R2 is hydrogen or C1-6-alkyl, preferably C1-4-alkyl, such as methyl, R3-R6 are independently selected from hydrogen, methyl and halogen, e.g. chloro or fluoro, R7 is hydrogen or methyl, R8-11 are independently selected from hydrogen, methyl, methoxy and halogen, e.g. chloro or fluoro, and R13 is hydrogen, and where at most one or two of R8-R11 are different from hydrogen and at most one or two of R3-R6 are different from hydrogen.
In a further embodiment, the compound according to the invention is selected from the following list:











Compound no.
Compound name
















1
[2-(1H-Indol-3-ylsulfanyl)benzyl] dimethyl amine


2
[2-(5-cyano-1H-indol-3-ylsulfanyl)benzyl] dimethyl amine


3
[2-(4-Fluoro-1H-indol-3-ylsulfanyl)benzyl] dimethyl amine


4
[2-(4-Chloro-1H-indol-3-ylsulfanyl)benzyl] dimethyl amine


5
[2-(5-Fluoro-1H-indol-3-ylsulfanyl)benzyl] dimethyl amine


6
[2-(5-Chloro-1H-indol-3-ylsulfanyl)benzyl] dimethyl amine


7
Dimethyl-[2-(7-methyl-1H-indol-3-ylsulfanyl)benzyl]-amine


8
[2-(7-Methoxy-1H-indol-3-ylsulfanyl)benzyl] dimethyl amine


9
[2-(5-Methoxy-1H-indol-3-ylsulfanyl)benzyl] dimethyl amine


10
[2-(6-Fluoro-1H-indol-3-ylsulfanyl)benzyl] dimethyl amine


11
[2-(6-Chloro-1H-indol-3-ylsulfanyl)benzyl] dimethyl amine


12
Dimethyl-[2-(2-methyl-1H-indol-3-ylsulfanyl)benzyl]-amine


13
Dimethyl-[2-(6-methyl-1H-indol-3-ylsulfanyl)benzyl]-amine


14
[2-(4-cyano-1H-indol-3-ylsulfanyl)benzyl] dimethyl amine


15
Dimethyl-[2-(1-methyl-1H-indol-3-ylsulfanyl)benzyl] amine


16
Dimethyl-[2-(4-methyl-1H-indol-3-ylsulfanyl)benzyl] amine


17
[2-(4-Hydroxy-1H-indol-3-ylsulfanyl)-benzyl]methyl amine


18
[2-(6-cyano-1H-indol-3-ylsulfanyl)benzyl] dimethyl amine


19
[2-(7-Chloro-1H-indol-3-ylsulfanyl)benzyl] dimethyl amine


20
[2-(6-Methoxy-1H-indol-3-ylsulfanyl)benzyl] dimethyl amine


21
[2-(4-Methoxy-1H-indol-3-ylsulfanyl)benzyl] dimethyl amine


22
[2-(1H-Indol-3-ylsulfanyl)benzyl]methyl amine


23
[2-(6-Fluoro-1H-indol-3-ylsulfanyl)benzyl]methyl amine


24
[2-(5-Fluoro-1H-indol-3-ylsulfanyl)benzyl]methyl amine


25
Methyl-[2-(4-methyl-1H-indol-3-ylsulfanyl)benzyl] amine


26
[2-(4-Chloro-1H-indol-3-ylsulfanyl)benzyl]methyl amine


27
Methyl-[2-(2-methyl-1H-indol-3-ylsulfanyl)benzyl] amine


28
[2-(5-Fluoro-2-methyl-1H-indol-3-ylsulfanyl)-benzyl]methyl amine


29
Methyl-[2-(5-methyl-1H-indol-3-ylsulfanyl)benzyl] amine


30
Methyl-[2-(7-methyl-1H-indol-3-ylsulfanyl)benzyl] amine


31
[2-(4-Fluoro-1H-indol-3-ylsulfanyl)benzyl]methyl amine


32
[2-(7-Ethyl-1H-indol-3-ylsulfanyl)benzyl]methyl amine


33
[2-(6-Methoxy-1H-indol-3-ylsulfanyl)benzyl]methyl amine


34
[2-(5-Chloro-1H-indol-3-ylsulfanyl)benzyl]methyl amine


35
[2-(6-Chloro-1H-indol-3-ylsulfanyl)benzyl]methyl amine


36
[2-(5-Methoxy-4-methyl-1H-indol-3-ylsulfanyl)-benzyl]methyl amine


37
[2-(5,6-Dimethoxy-1H-indol-3-ylsulfanyl)-benzyl]methyl amine


38
[2-(6-Bromo-1H-indol-3-ylsulfanyl)-benzyl]methyl amine


39
Methyl-[2-(6-methyl-1H-indol-3-ylsulfanyl)-benzyl] amine


40
[2-(4,7-Dimethoxy-1H-indol-3-ylsulfanyl)-benzyl]methyl amine


41
[2-(5-Methoxy-1H-indol-3-ylsulfanyl)benzyl]methyl amine


42
[2-(4-Methoxy-1H-indol-3-ylsulfanyl)benzyl]methyl amine


43
[2-(5-Bromo-1H-indol-3-ylsulfanyl)-benzyl]methyl amine


44
[2-(7-Methoxy-1H-indol-3-ylsulfanyl)benzyl]methyl amine


45
[5-Chloro-2-(1H-indol-3-ylsulfanyl)-benzyl]methyl amine


46
Methyl-[2-(6-trifluoromethyl-1H-indol-3-ylsulfanyl)-benzyl] amine


47
[2-(5-Hydroxy-1H-indol-3-ylsulfanyl)-benzyl]methyl amine


48
[2-(4-Bromo-1H-indol-3-ylsulfanyl)-benzyl]methyl amine


49
[2-(7-Chloro-1H-indol-3-ylsulfanyl)-benzyl]methyl amine


50
[2-(5-Iodo-1H-indol-3-ylsulfanyl)-benzyl]methyl amine


51
[2-(6-Cyano-1H-indol-3-ylsulfanyl)-benzyl]methyl amine


52
[2-(1H-Indol-3-ylsulfanyl)-5-methyl-benzyl]methyl amine


53
Methyl-[2-(3-methyl-1H-indol-2-ylsulfanyl)-benzyl] amine


54
[2-(5,6-Dimethoxy-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine


55
[5-Fluoro-2-(3-methyl-1H-indol-2-ylsulfanyl)-benzyl]-methyl-amine


56
[5-Fluoro-2-(4-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


57
[2-(4-Chloro-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine


58
[2-(7-Chloro-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine


59
[5-Fluoro-2-(6-trifluoromethyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


60
[5-Fluoro-2-(7-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


61
[2-(4-Bromo-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine


62
3-(4-Fluoro-2-methylaminomethyl-phenylsulfanyl)-2-methyl-1H-indol-4-ol


63
3-(4-Fluoro-2-methylaminomethyl-phenylsulfanyl)-1H-indol-6-ol


64
[5-Fluoro-2-(5-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


65
[5-Fluoro-2-(4-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


66
[2-(6-Chloro-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine


67
[2-(5-Chloro-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine


68
[5-Fluoro-2-(6-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


69
[5-Fluoro-2-(5-methoxy-4-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


70
[2-(5-Bromo-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine


71
[5-Fluoro-2-(5-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


72
[2-(6-Bromo-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine


73
[5-Fluoro-2-(6-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


74
[5-Fluoro-2-(6-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


75
[5-Fluoro-2-(2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


76
[5-Fluoro-2-(5-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


77
[5-Fluoro-2-(4-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


78
[5-Fluoro-2-(7-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


79
[5-Fluoro-2-(1-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


80
[5-Fluoro-2-(5-fluoro-2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


81
[5-Chloro-2-(5-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


82
[5-Chloro-2-(5-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


83
[5-Chloro-2-(7-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


84
[5-Chloro-2-(1-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


85
[5-Chloro-2-(4-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


86
[5-Chloro-2-(7-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


87
[5-Chloro-2-(6-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


88
[5-Chloro-2-(5-fluoro-2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


89
[2-(5-Fluoro-2-methyl-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine


90
Methyl-[5-methyl-2-(4-methyl-1H-indol-3-ylsulfanyl)-benzyl]-amine


91
[2-(7-Ethyl-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine


92
[2-(6-Methoxy-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine


93
Methyl-[5-methyl-2-(2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-amine


94
[2-(4-Methoxy-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine


95
[2-(6-Bromo-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine


96
[2-(6-Fluoro-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine


97
[2-(4-Fluoro-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine


98
3-(4-Methyl-2-methylaminomethyl-phenylsulfanyl)-1H-indol-6-ol


99
[5-Chloro-2-(5-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


100
[2-(6-Chloro-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine


101
[2-(5-Chloro-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine


102
5-Fluoro-3-(2-piperidin-1-ylmethyl-phenylsulfanyl)-1H-indole


103
5-Fluoro-3-(2-morpholin-4-ylmethyl-phenylsulfanyl)-1H-indole


104
5-Fluoro-3-(2-pyrrolidin-1-ylmethyl-phenylsulfanyl)-1H-indole


105
[4-Chloro-2-(6-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


106
[4-Chloro-2-(2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


107
[4-Chloro-2-(5-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


108
[4-Chloro-2-(7-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


109
[4-Chloro-2-(4-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


110
[4-Chloro-2-(5-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


111
[4-Chloro-2-(6-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


112
[4-Chloro-2-(4-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


113
[4-Chloro-2-(7-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


114
[4-Chloro-2-(7-ethyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


115
[4-Chloro-2-(5-methoxy-4-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


116
[4-Chloro-2-(5-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


117
[4-Chloro-2-(6-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


118
[4-Chloro-2-(7-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


119
[4-Chloro-2-(4-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


120
[4-Chloro-2-(5-chloro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


121
[4-Chloro-2-(6-chloro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


122
[4-Chloro-2-(4-chloro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


123
[4-Chloro-2-(7-chloro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


124
[4-Chloro-2-(1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


125
[4-Chloro-2-(1-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


126
[4-Chloro-2-(3-methyl-1H-indol-2-ylsulfanyl)-benzyl]-methyl-amine


127
[4-Chloro-2-(5-fluoro-2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


128
2-(5-Fluoro-1H-indol-3-ylsulfanyl)-benzylamine


129
[2-(5-Fluoro-4-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


130
[2-(4,5-Difluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


131
[2-(4,6-Difluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


132
3-(2-Methylaminomethyl-phenylsulfanyl)-1H-indol-4-ol


133
2-(6-Fluoro-1H-indol-3-ylsulfanyl)-benzylamine


134
[2-(5,6-Difluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine


135
6-Fluoro-3-(2-methylaminomethyl-phenylsulfanyl)-1H-indol-5-ol


136
[2-(4-Chloro-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine


137
[2-(1H-Indol-5-ylsulfanyl)-benzyl]-methyl-amine


138
[2-(1H-Indol-4-ylsulfanyl)-benzyl]-methyl-amine


139
[2-(1H-Indol-6-ylsulfanyl)-benzyl]-methyl-amine


140
[2-(1H-Indol-7-ylsulfanyl)-benzyl]-methyl-amine









as the free base or a salt thereof, such as a pharmaceutically acceptable salt.

An non limiting aspect of the invention concerns such compounds according to the below embodiments 1-87:

    
    
        1. A compound represented by the general formulas IA to IF:
    
    






    
    
         Wherein
        
            R1-R2 are independently selected from hydrogen, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl, and C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl; or R1 and R2 together with the nitrogen form a 4-7 membered ring containing zero or one double bond, optionally said ring in addition to said nitrogen comprises one further heteroatom selected from nitrogen, oxygen and sulphur;
            R3-R12 are independently selected from hydrogen, halogen, cyano, nitro, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl, C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl, amino, C1-6-alk(en/yn)ylamino, di-(C1-6-alk(en/yn)yl)amino, C1-6-alk(en/yn)ylcarbonyl, aminocarbonyl, C1-6-alk(en/yn)ylaminocarbonyl, di-(C1-6-alk(en)yl)aminocarbonyl, hydroxy, C1-6-alk(en/yn)yloxy, C1-6-alk(en/yn)ylthio, halo-C1-6-alk(en/yn)yl, halo-C1-6-alk(en/yn)ylsulfonyl, halo-C1-6-alk(en/yn)ylsulfanyl, and C1-6-alk(en/yn)ylsulfonyl; and
            R13 is selected from hydrogen, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl, and C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl;
            or a salt thereof.
        
        
        2. The compound of embodiment 1, wherein R1-R2 are independently selected from hydrogen, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl, and C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl; or a salt thereof.
        3. The compound of embodiment 1, wherein R1-R2 are independently selected from hydrogen and C1-6-alkyl; or a salt thereof.
        4. The compound of embodiment 1, wherein R1 is hydrogen and R2 is methyl; or a salt thereof.
        5. The compound of embodiment 1, wherein R1 and R2 are methyl; or a salt thereof.
        6. The compound of embodiment 1, wherein R1 and R2 are hydrogen; or a salt thereof.
        7. The compound of embodiment 1, wherein R1 and R2 together with the nitrogen form a 4-7 membered ring containing zero or one double bond, optionally said ring in addition to said nitrogen comprises one further heteroatom selected from nitrogen, oxygen and sulphur; or a salt thereof.
        8. The compound of embodiment 1, wherein R1 and R2 together with the nitrogen form a ring selected from the group consisting of azetidine, pyrolidine, piperidine, piperazine, homopiperazine or morpholine; or a salt thereof.
        9. The compound of any of embodiments 1-8, wherein R3-R12 are independently selected from hydrogen, halogen, cyano, C1-6-alkyl, C3-8-cycloalkyl, C3-8-cycloalkyl-C1-6-alkyl, amino, C1-6-alkylamino, di-(C1-6-alkyl)amino, C1-6-alkylcarbonyl, aminocarbonyl, C1-6-alkylaminocarbonyl, di-(C1-6-alkylamino)carbonyl, hydroxy, C1-6-alkoxy, C1-6-alkylthio, halo-C1-6-alkyl, halo-C1-6-alkylsulfonyl, halo-C1-6-alkylsulfanyl, and C1-6-alkylsulfonyl; or a salt thereof.
        10. The compound of any of embodiments 1-8, wherein R3-R6 are independently selected from hydrogen, halogen, cyano, nitro, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl, C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl, amino, C1-6-alk(en/yn)ylamino, di-(C1-6-alk(en/yn)yl)amino, C1-6-alk(en/yn)ylcarbonyl, aminocarbonyl, C1-6-alk(en/yn)ylaminocarbonyl, di-(C1-6-alk(en)yl)aminocarbonyl, hydroxy, C1-6-alk(en/yn)yloxy, C1-6-alk(en/yn)ylthio, halo-C1-6-alk(en/yn)yl, halo-C1-6-alk(en/yn)ylsulfonyl, halo-C1-6-alk(en/yn)ylsulfanyl, and C1-6-alk(en/yn)ylsulfonyl; or a salt thereof.
        11. The compound of any of embodiments 1-8, wherein R3-R6 are independently selected from hydrogen, halogen, cyano, C1-6-alkyl, C3-8-cycloalkyl, C3-8-cycloalkyl-C1-6-alkyl, amino, C1-6-alkylamino, di-(C1-6-alkyl)amino, C1-6-alkylcarbonyl, aminocarbonyl, C1-6-alkylaminocarbonyl, di-(C1-6-alkylamino)carbonyl, hydroxy, C1-6-alkoxy, C1-6-alkylthio, halo-C1-6-alkyl, halo-C1-6-alkylsulfonyl, halo-C1-6-alkylsulfanyl, and C1-6-alkylsulfonyl; or a salt thereof.
        12. The compound of any of embodiments 1-8, wherein R3-R6 are independently selected from hydrogen, halogen, C1-6-alkyloxy and C1-6-alkyl; or a salt thereof.
        13. The compound of any of embodiments 1-8, wherein R3-R6 are independently selected from hydrogen, halogen, methoxy and methyl; or a salt thereof.
        14. The compound of any of embodiments 1-13, wherein only one or two of R3-R6 is different from hydrogen.
        15. The compound of any of embodiments 1-13, wherein only one of R3-R6 is different from hydrogen; or a salt thereof.
        16. The compound of any of embodiments 1-9, wherein three of R3-R6 are hydrogen and one of R3-R6 is halogen; or a salt thereof.
        17. The compound of any of embodiments 1-9, wherein three of R3-R6 are hydrogen and one of R3-R6 is methyl; or a salt thereof.
        18. The compound of any of embodiments 15-17, wherein R4 is different from hydrogen; or a salt thereof.
        19. The compound of any of embodiments 15-17, wherein R5 is different from hydrogen; or a salt thereof.
        20. The compound of any of embodiments 1-9, wherein R3-R6 are hydrogen; or a salt thereof.
        21. The compound of any of embodiments 1-20, wherein R13 is hydrogen; or a salt thereof.
        22. The compound of any of embodiments 1-20, wherein R13 is C1-6-alkyl; or a salt thereof
        23. The compound of any of embodiments 1-20, wherein R13 is methyl; or a salt thereof.
        24. The compound of any of embodiments 1-23, wherein the compound has the formula IA; or a salt thereof.
        25. The compound of any of embodiments 1-23, wherein the compound has the formula IB; or a salt thereof.
        26. The compound of any of embodiments 1-23, wherein the compound has the formula IC; or a salt thereof.
        27. The compound of any of embodiments 1-23, wherein the compound has the formula ID; or a salt thereof.
        28. The compound of any of embodiments 1-23, wherein the compound has the formula IE; or a salt thereof.
        29. The compound of any of embodiments 1-23, wherein the compound has the formula IF, or a salt thereof.
        30. The compound of any of embodiments 1-23, wherein the compound has the formula IA and R7 is selected from the group consisting of hydrogen, halogen, cyano, nitro, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl, C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl, amino, C1-6-alk(en/yn)ylamino, di-(C1-6-alk(en/yn)yl)am ino, C1-6-alk(en/yn)ylcarbonyl, aminocarbonyl, C1-6-alk(en/yn)ylaminocarbonyl, di-(C1-6-alk(en)yl)aminocarbonyl, hydroxy, C1-6-alk(en/yn)yloxy, C1-6-alk(en/yn)ylthio, halo-C1-6-alk(en/yn)yl, halo-C1-6-alk(en/yn)ylsulfonyl, halo-C1-6-alk(en/yn)ylsulfanyl, and C1-6-alk(en/yn)ylsulfonyl; or a salt thereof.
        31. The compound of any of embodiments 1-23, wherein the compound has the formula IA and R7 is selected from the group consisting of hydrogen, halogen, cyano, C1-6-alkyl, C3-8-cycloalkyl, C3-8-cycloalkyl-C1-6-alkyl, amino, C1-6-alkylamino, di-(C1-6-alkyl)amino, C1-6-alkylcarbonyl, aminocarbonyl, C1-6-alkylaminocarbonyl, di-(C1-6-alkylamino)carbonyl, hydroxy, C1-6-alkoxy, C1-6-alkylthio, halo-C1-6-alkyl, halo-C1-6-alkylsulfonyl, halo-C1-6-alkylsulfanyl, and C1-6-alkylsulfonyl; or a salt thereof.
        32. The compound of any of embodiments 1-23, wherein the compound has the formula IA and R7 is hydrogen; or a salt thereof.
        33. The compound of any of embodiments 1-23, wherein the compound has the formula IA and R7 is methyl; or a salt thereof.
        34. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R8-R11 are independently selected from hydrogen, halogen, cyano, nitro, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl, C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl, amino, C1-6-alk(en/yn)ylamino, di-(C1-6-alk(en/yn)yl)amino, C1-6-alk(en/yn)ylcarbonyl, aminocarbonyl, C1-6-alk(en/yn)ylaminocarbonyl, di-(C1-6-alk(en)yl)aminocarbonyl, hydroxy, C1-6-alk(en/yn)yloxy, C1-6-alk(en/yn)ylthio, halo-C1-6-alk(en/yn)yl, halo-C1-6-alk(en/yn)ylsulfonyl, halo-C1-6-alk(en/yn)ylsulfanyl, and C1-6-alk(en/yn)ylsulfonyl; or a salt thereof.
        35. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R8-R11 are independently selected from hydrogen, halogen, cyano, C1-6-alkyl, C3-8-cycloalkyl, C3-8-cycloalkyl-C1-6-alkyl, amino, C1-6-alkylamino, di-(C1-6-alkyl)amino, C1-6-alkylcarbonyl, aminocarbonyl, C1-6-alkylaminocarbonyl, di-(C1-6-alkylamino)carbonyl, hydroxy, C1-6-alkoxy, C1-6-alkylthio, halo-C1-6-alkyl, halo-C1-6-alkylsulfonyl, halo-C1-6-alkylsulfanyl, and C1-6-alkylsulfonyl; or a salt thereof.
        36. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R8-R11 are independently selected from hydrogen, halogen, cyano, methyl, hydroxy, methoxy and trifluoromethyl; or a salt thereof.
        37. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R8-R11 are independently selected from hydrogen, halogen, methyl and methoxy; or a salt thereof.
        38. The compound of any of embodiments 34-36, wherein only one of R8-R11 is different from hydrogen while rest of R8-R11 are hydrogen; or a salt thereof.
        39. The compound of any of embodiments 34-36, wherein the compound has the formula IA and two of R8-11 are different from hydrogen and two of R8-11 are hydrogen; or a salt thereof.
        40. The compound of any one of embodiments 1-23 or 30-37, wherein the compound has the formula IA and R8 is selected from the group consisting of halogen, methyl, and methoxy; or a salt thereof.
        41. The compound of embodiments 40, wherein R9-11 are hydrogen; or a salt thereof.
        42. The compound of embodiments 41, wherein R7 is hydrogen; or a salt thereof.
        43. The compound of any one of embodiments 1-23 or 30-37, wherein the compound has the formula IA and R9 is selected from the group consisting of halogen, methyl, and methoxy; or a salt thereof.
        44. The compound of embodiments 43, wherein R8 and R10-11 are hydrogen; or a salt thereof.
        45. The compound of embodiments 44, wherein R7 is hydrogen; or a salt thereof.
        46. The compound of any of embodiments 1-23 or 30-33, wherein the compound has the formula IA and wherein R8-11 are hydrogen; or a salt thereof.
        47. The compound of embodiments 38 or 39, wherein substituent(s) of R8-11 being different from hydrogen is/are selected from the group consisting of halogen, methyl, methoxy, hydroxy, cyano; or a salt thereof.
        48. The compound of embodiment 1, wherein the compound has the formula IA, and
        
            R1 is hydrogen and R2 is hydrogen or a C1-6-alkyl;
            R3-R6 are independently selected from hydrogen, halogen and methyl, wherein at most one or two of R3-R6 are different from hydrogen;
            R7 is hydrogen or methyl
            R8-11 are independently selected from hydrogen, halogen, methyl, and methoxy wherein at most one or two of R8-R11 are different from hydrogen;
            R13 is hydrogen.
            or a salt thereof.
        
        
        49. The compound of embodiment 1 wherein the compound has the formula IA,
        
            R1 is hydrogen and R2 is methyl;
            R3-R6 are as defined in any one of claims 13-20;
            R7 is hydrogen
            R8-R11 are as defined in claim 36-47
            R13 is hydrogen;
            or a salt thereof.
        
        
        50. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R8 is hydroxy; or a salt thereof.
        51. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R8 is methoxy; or a salt thereof.
        52. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R8 is methyl; or a salt thereof.
        53. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R8 is cyano; or a salt thereof.
        54. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R8 is Cl; or a salt thereof.
        55. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R8 is F; or a salt thereof.
        56. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R9 is cyano; or a salt thereof.
        57. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R9 is F; or a salt thereof.
        58. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R9 is Cl; or a salt thereof.
        59. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R9 is Br; or a salt thereof.
        60. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R9 is I; or a salt thereof.
        61. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R9 is methoxy; or a salt thereof.
        62. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R9 is methyl; or a salt thereof.
        63. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R9 is hydroxy; or a salt thereof.
        64. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R10 is F; or a salt thereof.
        65. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R10 is Cl; or a salt thereof.
        66. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R10 is Br; or a salt thereof.
        67. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R10 is methyl; or a salt thereof.
        68. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R10 is cyano; or a salt thereof.
        69. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R10 is CF3; or a salt thereof.
        70. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R10 is methoxy; or a salt thereof.
        71. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R11 is methyl; or a salt thereof.
        72. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R11 is ethyl; or a salt thereof.
        73. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R11 is methoxy; or a salt thereof.
        74. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R11 is Cl; or a salt thereof.
        75. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R11 is F; or a salt thereof.
        76. The compound of any of embodiments 50-75, wherein the rest of R8 to R11 are hydrogen; or a salt thereof.
        77. The compound of any of embodiments 1-23 or any of embodiments 30-33, wherein the compound has the formula IA and R10 and R11 are selected independently from the group consisting of hydrogen, methyl, fluoro and chloride; or a salt thereof.
        78. The compound of embodiment 77, wherein at least one of R10 and R11 is hydrogen; or a salt thereof.
        79. The compound of claim 1 selected from the group consisting of:
    
    
    [2-(1H-Indol-3-ylsulfanyl)benzyl]dimethyl amine;
    [2-(5-cyano-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    [2-(4-Fluoro-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    [2-(4-Chloro-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    [2-(5-Fluoro-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    [2-(5-Chloro-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    Dimethyl-[2-(7-methyl-1H-indol-3-ylsulfanyl)benzyl]amine
    [2-(7-Methoxy-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    [2-(5-Methoxy-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    [2-(6-Fluoro-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    [2-(6-Chloro-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    Dimethyl-[2-(2-methyl-1H-indol-3-ylsulfanyl)benzyl]amine
    Dimethyl-[2-(6-methyl-1H-indol-3-ylsulfanyl)benzyl]amine
    [2-(4-cyano-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    Dimethyl-[2-(1-methyl-1H-indol-3-ylsulfanyl)benzyl]amine
    Dimethyl-[2-(4-methyl-1H-indol-3-ylsulfanyl)benzyl]amine
    Dimethyl-[2-(4-hydroxy-1H-indol-3-ylsulfanyl)benzyl]amine
    [2-(6-cyano-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    [2-(7-Chloro-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    [2-(6-Methoxy-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    [2-(4-Methoxy-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    [2-(1H-lndol-3-ylsulfanyl)benzyl]methyl amine
    [2-(6-Fluoro-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    [2-(5-Fluoro-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    Methyl-[2-(4-methyl-1H-indol-3-ylsulfanyl)benzyl]amine
    [2-(4-Chloro-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    Methyl-[2-(2-methyl-1H-indol-3-ylsulfanyl)benzyl]amine
    [2-(5-Fluoro-2-methyl-1H-indol-3-ylsulfanyl)-benzyl]methyl amine
    Methyl-[2-(5-methyl-1H-indol-3-ylsulfanyl)benzyl]amine
    Methyl-[2-(7-methyl-1H-indol-3-ylsulfanyl)benzyl]amine
    [2-(4-Fluoro-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    [2-(7-Ethyl-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    [2-(6-Methoxy-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    [2-(5-Chloro-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    [2-(6-Chloro-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    [2-(5-Methoxy-4-methyl-1H-indol-3-ylsulfanyl)-benzyl]methyl amine
    [2-(5,6-Dimethoxy-1H-indol-3-ylsulfanyl)-benzyl]methyl amine
    [2-(6-Bromo-1H-indol-3-ylsulfanyl)-benzyl]methyl amine
    Methyl-[2-(6-methyl-1H-indol-3-ylsulfanyl)-benzyl]amine
    [2-(4,7-Dimethoxy-1H-indol-3-ylsulfanyl)-benzyl]methyl amine
    [2-(5-Methoxy-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    [2-(4-Methoxy-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    [2-(5-Bromo-1H-indol-3-ylsulfanyl)-benzyl]methyl amine
    [2-(7-Methoxy-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    [5-Chloro-2-(1H-indol-3-ylsulfanyl)-benzyl]methyl amine
    Methyl-[2-(6-trifluoromethyl-1H-indol-3-ylsulfanyl)-benzyl]amine;
    [5-Hydroxy-2-(1H-indol-3-ylsulfanyl)-benzyl]methyl amine;
    [2-(4-Bromo-1H-indol-3-ylsulfanyl)-benzyl]methyl amine;
    [2-(7-Chloro-1H-indol-3-ylsulfanyl)-benzyl]methyl amine;
    [2-(5-lodo-1H-indol-3-ylsulfanyl)-benzyl]methyl amine;
    [2-(6-Cyano-1H-indol-3-ylsulfanyl)-benzyl]methyl amine;
    [2-(1H-Indol-3-ylsulfanyl)-5-methyl-benzyl]methyl amine;
    [2-(3-methyl-1H-indol-2-ylsulfanyl)-benzyl]methyl amine;
    [2-(5,6-Dimethoxy-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine;
    [5-Fluoro-2-(3-methyl-1H-indol-2-ylsulfanyl)-benzyl]-methyl-amine;
    [5-Fluoro-2-(4-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [2-(4-Chloro-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine;
    [2-(7-Chloro-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine;
    [5-Fluoro-2-(6-trifluoromethyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [5-Fluoro-2-(7-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [2-(4-Bromo-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine;
    3-(4-Fluoro-2-methylaminomethyl-phenylsulfanyl)-2-methyl-1H-indol-4-ol;
    3-(4-Fluoro-2-methylaminomethyl-phenylsulfanyl)-1H-indol-6-ol;
    [5-Fluoro-2-(5-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [5-Fluoro-2-(4-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [2-(6-Chloro-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine;
    [2-(5-Chloro-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine;
    [5-Fluoro-2-(6-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [5-Fluoro-2-(5-methoxy-4-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [2-(5-Bromo-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine;
    [5-Fluoro-2-(5-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [2-(6-Bromo-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine;
    [5-Fluoro-2-(6-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [5-Fluoro-2-(6-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [5-Fluoro-2-(2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [5-Fluoro-2-(5-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [5-Fluoro-2-(4-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [5-Fluoro-2-(7-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [5-Fluoro-2-(1-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [5-Fluoro-2-(5-fluoro-2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [5-Chloro-2-(5-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [5-Chloro-2-(5-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [5-Chloro-2-(7-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [5-Chloro-2-(1-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [5-Chloro-2-(4-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [5-Chloro-2-(7-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [5-Chloro-2-(6-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [5-Chloro-2-(5-fluoro-2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [2-(5-Fluoro-2-methyl-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine;
    Methyl-[5-methyl-2-(4-methyl-1H-indol-3-ylsulfanyl)-benzyl]-amine;
    [2-(7-Ethyl-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine;
    [2-(6-Methoxy-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine;
    Methyl-[5-methyl-2-(2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-amine;
    [2-(4-Methoxy-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine;
    [2-(6-Bromo-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine;
    [2-(6-Fluoro-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine;
    [2-(4-Fluoro-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine;
    3-(4-Methyl-2-methylaminomethyl-phenylsulfanyl)-1H-indol-6-ol;
    [5-Chloro-2-(5-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [2-(6-Chloro-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine;
    [2-(5-Chloro-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine;
    5-Fluoro-3-(2-piperidin-1-ylmethyl-phenylsulfanyl)-1H-indole;
    5-Fluoro-3-(2-morpholin-4-ylmethyl-phenylsulfanyl)-1H-indole;
    5-Fluoro-3-(2-pyrrolidin-1-ylmethyl-phenylsulfanyl)-1H-indole;
    [4-Chloro-2-(6-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(5-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(7-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(4-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(5-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(6-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(4-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(7-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(7-ethyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(5-methoxy-4-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(5-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(6-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(7-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(4-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(5-chloro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(6-chloro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(4-chloro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(7-chloro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(1-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(3-methyl-1H-indol-2-ylsulfanyl)-benzyl]-methyl-amine;
    [4-Chloro-2-(5-fluoro-2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    2-(5-Fluoro-1H-indol-3-ylsulfanyl)-benzylamine;
    [2-(5-Fluoro-4-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [2-(4,5-Difluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    [2-(4,6-Difluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    3-(2-Methylaminomethyl-phenylsulfanyl)-1H-indol-4-ol;
    2-(6-Fluoro-1H-indol-3-ylsulfanyl)-benzylamine;
    [2-(5,6-Difluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
    6-Fluoro-3-(2-methylaminomethyl-phenylsulfanyl)-1H-indol-5-ol;[2-(4-Chloro-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine;
    [2-(1H-Indol-5-ylsulfanyl)-benzyl]-methyl-amine;
    [2-(1H-Indol-4-ylsulfanyl)-benzyl]-methyl-amine;
    [2-(1H-Indol-6-ylsulfanyl)-benzyl]-methyl-amine; and
    [2-(1H-Indol-7-ylsulfanyl)-benzyl]-methyl-amine;
    or a salt thereof.
    
        80. The compound of any of embodiments 1-23, wherein the compound has the formula IB and R12 is hydrogen or methyl; or a salt thereof.
        81. A compound of any one of embodiments 1-80 or a pharmaceutically acceptable salt thereof for use in a medicament.
        82. The use of a compound of any one of embodiments 1-80 or a pharmaceutically acceptable salt thereof for the preparation of a medicament for the treatment of affective disorders.
        83. The use of a compound of any one of embodiments 1-80 or a pharmaceutically acceptable salt thereof for the preparation of a medicament for the treatment of depression, anxiety disorders including general anxiety disorder, social anxiety disorder, post traumatic stress disorder, obsessive compulsive disorder, panic disorder, panic attacks, specific phobias, social phobia or agoraphobia.
        84. The use of a compound of any one of embodiments 1-80 or a pharmaceutically acceptable salt thereof for the preparation of a medicament for the treatment of depression.
        85. A method for the treatment of an affective disorder comprising administering a therapeutically effective amount of a compound of any one of embodiments 1-80 or a pharmaceutically acceptable salt thereof.
        86. A method for the treatment of depression, anxiety disorders including general anxiety disorder, social anxiety disorder, post traumatic stress disorder, obsessive compulsive disorder, panic disorder, panic attacks, specific phobias, social phobia or agoraphobia comprising administering a therapeutically effective amount of a compound of any one of embodiments 1-80 or a pharmaceutically acceptable salt thereof.
        87. A pharmaceutical composition comprising a compound of any one of embodiments 1-80 or a pharmaceutically acceptable salt thereof.
    
    


The present invention comprises the free bases of the compounds of the invention. The present invention furthermore comprises salts of the compounds of the invention, typically, pharmaceutically acceptable salts. Such salts include pharmaceutical acceptable acid addition salts, pharmaceutically acceptable metal salts, ammonium and alkylated ammonium salts. Acid addition salts include salts of inorganic acids as well as organic acids.
Examples of suitable inorganic acids include hydrochloric, hydrobromic, hydroiodic, phosphoric, sulfuric, sulfamic, nitric acids and the like.
Examples of suitable organic acids include formic, acetic, trichloroacetic, trifluoroacetic, propionic, benzoic, cinnamic, citric, fumaric, glycolic, itaconic, lactic, methanesulfonic, maleic, malic, malonic, mandelic, oxalic, picric, pyruvic, salicylic, succinic, methane sulfonic, ethanesulfonic, tartaric, ascorbic, pamoic, bismethylene salicylic, ethanedisulfonic, gluconic, citraconic, aspartic, stearic, palmitic, EDTA, glycolic, p-aminobenzoic, glutamic, benzenesulfonic, p-toluenesulfonic acids, theophylline acetic acids, as well as the 8-halotheophyllines, for example 8-bromotheophylline and the like.
Also intended as pharmaceutical acceptable acid addition salts are the hydrates, which the present compounds, are able to form.
Further, the compounds of this invention may exist in unsolvated as well as in solvated forms with pharmaceutically acceptable solvents such as water, ethanol and the like. In general, the solvated forms are considered equivalent to the unsolvated forms for the purposes of this invention.
The compounds of the present invention may have one or more asymmetric centres and it is intended that any optical isomers (i.e. enantiomers or diastereomers), as separated, pure or partially purified optical isomers and any mixtures thereof including racemic mixtures, i.e. a mixture of stereoisomeres, are included within the scope of the invention
Racemic forms can be resolved into the optical antipodes by known methods, for example, by separation of diastereomeric salts thereof with an optically active acid, and liberating the optically active amine compound by treatment with a base. Another method for resolving racemates into the optical antipodes is based upon chromatography on an optically active matrix. Racemic compounds of the present invention can also be resolved into their optical antipodes, e.g. by fractional crystallization. The compounds of the present invention may also be resolved by the formation of diastereomeric derivatives. Additional methods for the resolution of optical isomers, known to those skilled in the art, may be used. Such methods include those discussed by J. Jaques, A. Collet and S. Wilen in “Enantiomers, Racemates, and Resolutions”, John Wiley and Sons, New York (1981). Optically active compounds can also be prepared from optically active starting materials.
Furthermore, when a double bond or a fully or partially saturated ring system is present in the molecule geometric isomers may be formed. It is intended that any geometric isomers, as separated, pure or partially purified geometric isomers or mixtures thereof are included within the scope of the invention. Likewise, molecules having a bond with restricted rotation may form geometric isomers. These are also intended to be included within the scope of the present invention.
Furthermore, some of the compounds of the present invention may exist in different tautomeric forms and it is intended that any tautomeric forms that the compounds are able to form are included within the scope of the present invention.
The invention also encompasses prodrugs of the present compounds, which on administration undergo chemical conversion by metabolic processes before becoming pharmacologically active substances. In general, such prodrugs will be functional derivatives of the compounds of the general formula I, IA, IB, IC, IE or IF which are readily convertible in vivo into the required compound of the formula I, IA, IB, IC, IE or IF. Conventional procedures for the selection and preparation of suitable prodrug derivatives are described, for example, in “Design of Prodrugs”, ed. H. Bundgaard, Elsevier, 1985.
The invention also encompasses active metabolites of the present compounds.
As described above the compounds of the invention, 2-(1 H-indolylsulfanyl)-benzyl amine derivatives, are serotonin reuptake inhibitors.
Accordingly, one embodiment of invention relates to compounds of Formula I, IA, IB, IC, IE or IF (e.g. formula IA) as the free base or a salt therof, wherein R1-R13 are as described herein, which compounds are serotonin reuptake inhibitors, i.e., e.g., having a binding affinity (IC50) of 5 μM or less, typically of 1 μM or less, preferably less than 500 nM or less than 100 nM or less than 50 nM, preferably as measured by the method described in Example 9—Transporter binding assay.
One embodiment of invention relates to compounds of formula I, IA, IB, IC, IE or IF (e.g. formula IA) as the free base or salts therof, wherein R1-R13 are as described herein, which compounds are norepinephrine reuptake inhibitors, i.e., e.g., having a binding affinity (IC50) of 5 μM or less, typically of 1 μM or less, preferably less than 500 nM, less than 100 nM or less than 50 nM, preferably as measured by the method described in Example 9—Transporter binding assay.
A further embodiment of invention relates to compounds of formula I, IA, IB, IC, IE or IF (e.g. formula (IA)) as the free base or salts thereof, wherein R1-R13 are as described herein, which compounds are dopamine reuptake inhibitors, i.e., e.g., having a binding affinity (IC50) of 5 μM or less, typically of 1 μM or less, preferably less than 500 nM, less than 100 nM or less than 50 nM, preferably as measured by the method described in Example 9—Transporter binding assay.
In particular, the invention provides compounds possessing the combined effect of serotonin reuptake inhibition and norepinephrine reuptake inhibition. Accordingly, a preferred embodiment relates to compounds of the invention (i.e. the compounds of formula I, IA, IB, IC, IE or IF (e.g. of formula IA) for which R1-R13 are as described herein) being dual serotonin and norepinephrine reuptake inhibitors, i.e. compounds of the invention which are both norepinephrine reuptake inhibitors and serotonin reuptake inhibitors, each of which are as defined above.
In one embodiment, it is preferred for the compounds of the invention possessing the combined effect of serotonin reuptake inhibition and norepinephrine reuptake inhibition as described above, that such compounds are not also dopamine reuptake inhibitors. Thus, this embodiment relates to compounds of the invention having a binding affinity for the serotonin transporter which is at least 5, preferably at least 10 or even more preferred at least 20 or 30 times higher than the binding affinity for the dopamine transporter, preferably as measured by the methods described in Example 9—Transporter binding assay.
In a further aspect the invention provides compounds possessing the combined effect of serotonin reuptake inhibition, norepinephrine and dopamine reuptake inhibition.
Accordingly, a preferred embodiment relates to compounds of the invention (i.e. the compounds of formula I, IA, IB, IC, IE or IF (e.g. formula IA) for which R1-R13 are as described herein) being triple serotonin, norepinephrine and dopamine reuptake inhibitors, i.e. compounds of the invention which are at the same time norepinephrine reuptake inhibitors, serotonin reuptake inhibitors, and dopamine reuptake inhibitors, each of which are as defined above.
Pharmaceutical Use
In a further aspect the invention provides a compound of formula I, IA, IB, IC, ID, IE or IF for use as a medicament.
As mentioned above the compounds of the invention are inhibitors of the serotonin transporter. In particular is provided compounds of the invention which are dual inhibitors of the serotonin and noradrenaline transporters. The compounds of the invention may thus be useful for treatment in a disorder or disease wherein the serotonin and/or noradrenaline are implicated.
Accordingly, in a further aspect the invention relates to a compound of the invention as the free base or a salt thereof for use as a medicament, i.e. in particular a compound represented by the general formula I, IA, IB, IC, IE or IF, e.g. formula IA, wherein

    
    
        R1-R2 are independently selected from hydrogen, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl, and C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl; or R1 and R2 together with the nitrogen form a 4-7 membered ring containing zero or one double bond, optionally said ring in addition to said nitrogen comprises one further heteroatom selected from nitrogen, oxygen and sulphur; which ring structure is substituted or unsubstituted as described herein;
        R3-R12 are independently selected from hydrogen, halogen, cyano, nitro, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl, C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl, amino, C1-6-alk(en/yn)ylamino, di-(C1-6-alk(en/yn)yl)amino, C1-6-alk(en/yn)ylcarbonyl, am inocarbonyl, C1-6-alk(en/yn)ylaminocarbonyl, di-(C1-6-alk(en)yl)aminocarbonyl, hydroxy, C1-6-alk(en/yn)yloxy, C1-6-alk(en/yn)ylthio, halo-C1-6-alk(en/yn)yl, halo-C1-6-alk(en/yn)ylsulfonyl, halo-C1-6-alk(en/yn)ylsulfanyl, and C1-6-alk(en/yn)ylsulfonyl; and
        R13 is selected from hydrogen, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl, and C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl;

as the free base or a salt thereof;

with the provisos that:

        when the sulphur atom is attached via atom nr. 2 of the indole then R7 does not exist;
        when the sulphur atom is attached via atom nr. 3 of the indole then R12 does not exist;
        when the sulphur atom is attached via atom nr. 4 of the indole then R8 does not exist;
        when the sulphur atom is attached via atom nr. 5 of the indole then R9 does not exist;
        when the sulphur atom is attached via atom nr. 6 of the indole then R10 does not exist; and
        when the sulphur atom is attached via atom nr. 7 of the indole then R11 does not exist.
    
    


By the expression a compound of the invention is meant any one of the embodiments of formula I, IA, IB, IC, IE or IF, in particular formula IA described herein.
The present invention also relates to a pharmaceutical composition comprising a compound of the invention as the free base or a salt thereof and a pharmaceutically acceptable carrier or diluent.
In an embodiment of the pharmaceutical composition, the compound of the invention is present in an amount of from about 0.001 to about 100 mg/kg body weight per day.
The present invention also relates to use of a compound of the invention as the free base or a salt thereof for the preparation of a pharmaceutical composition for the treatment of a disease or disorder, wherein a serotonin reuptake inhibitor is beneficial. The medicament may comprise any one of the embodiments of formula I, IA, IB, IC, IE or IF described herein.
The present invention also relates to use of a compound of the invention as the free base or a salt thereof for the preparation of a pharmaceutical composition for the treatment of a disease or disorder, wherein the combined effect of serotonin reuptake inhibition and norepinephrine reuptake inhibition is beneficial. The medicament may comprise any one of the embodiments of formula I, IA, IB, IC, IE or IF described herein.
The present invention also relates to use of a compound of the invention as the free base or a salt thereof for the preparation of a pharmaceutical composition for the treatment of a disease or disorder, the combined effect of serotonin reuptake inhibition and norepinephrine and dopamine reuptake inhibition is beneficial. The medicament may comprise any one of the embodiments of formula I, IA, IB, IC, IE or IF described herein.
A further embodiment of the invention relates to the use of a compound of formula I, IA, IB, IC, ID, IE or IF for the preparation of a pharmaceutical composition for the treatment of affective disorders, pain disorders, ADHD and stress urinary incontinence.
In particular the invention also relates to use of a compound of the invention as the free base or a salt thereof for the preparation of a pharmaceutical composition for the treatment of affective disorders. To further illustrate without limiting the invention, the affective disorder to be treated is selected from the group consisting of depressive disorders and anxiety disorders.
A further embodiment concerns the use of a compound of formula I, IA, IB, IC, ID, It or IF for the preparation of a pharmaceutical composition for the treatment of depressive disorders. Typically, the depressive disorder to be treated is selected from the group consisting of major depressive disorder, postnatal depression, dysthymia and depression associated with bipolar disorder, alzheimers, psychosis or parkinsons. To further illustrate without limiting the invention, an embodiment of the invention concerns the treatment of major depressive disorder; another embodiment concerns the treatment of postnatal depression; another embodiment concerns the treatment of dysthymia; another embodiment concerns the treatment of depression associated with bipolar disorder, alzheimers, psychosis or parkinsons. To further illustrate without limiting the invention, an embodiment of the invention concerns the treatment of depression associated with bipolar disorder; another embodiment concerns the treatment of depression associated with alzheimers; another embodiment concerns the treatment of depression associated with psychosis; another embodiment concerns the treatment of depression associated with parkinsons.
In a further embodiment the invention also relates to use of a compound of the invention as the free base or a salt thereof for the preparation of a pharmaceutical composition for the treatment of depression.
In a further embodiment the invention also relates to use of a compound of the invention as the free base or a salt thereof for the preparation of a pharmaceutical composition for the treatment of anxiety disorders. Typically, the anxiety disorders to be treated are selected from the group consisting of general anxiety disorder, social anxiety disorder, post traumatic stress disorder, obsessive compulsive disorder, panic disorder, panic attacks, specific phobias, social phobia and agoraphobia. In a further embodiment the invention also relates to use of a compound of the invention as the free base or a salt thereof for the preparation of a pharmaceutical composition for the treatment of general anxiety disorder. In a further embodiment the invention also relates to use of a compound of the invention as the free base or a salt thereof for the preparation of a pharmaceutical composition for the treatment of social anxiety disorder. In a further embodiment the invention also relates to use of a compound of the invention as the free base or a salt thereof for the preparation of a pharmaceutical composition for the treatment of post traumatic stress disorder. In a further embodiment the present invention also relates to use of a compound of the invention as the free base or a salt thereof the preparation of a pharmaceutical composition for the treatment of obsessive compulsive disorder. In a further embodiment the invention also relates to use of a compound of the invention as the free base or a salt thereof for the preparation of a pharmaceutical composition for the treatment of panic disorder. In a further embodiment present invention also relates to use of a compound of the invention as the free base or a salt thereof for the preparation of a pharmaceutical composition for the treatment of panic attacks. In a further embodiment the invention also relates to use of a compound of the invention as the free base or a salt thereof for the preparation of a pharmaceutical composition for the treatment of specific phobias. In a further embodiment the invention also relates to use of a compound of the invention as the free base or a salt thereof for the preparation of a pharmaceutical composition for the treatment of social phobia. In a further embodiment the invention also relates to use of a compound of the invention as the free base or a salt thereof for the preparation of a pharmaceutical composition for the treatment of agoraphobia.
A further aspect of the invention relates to a method for the treatment of a disease or disorder selected from the group consisting of an affective disorder, such as depression, anxiety disorders including general anxiety disorder, social anxiety disorder, post traumatic stress disorder, obsessive compulsive disorder, panic disorder, panic attacks, specific phobias, social phobia and agoraphobia in a living animal body, including a human, comprising administering to a subject in need thereof a therapeutically effective amount of a compound of the invention as the free base or a salt thereof, i.e. in particular a compound represented by the general formula I, IA, IB, IC, IE or IF, e.g. formula IA.
In a further embodiment the present invention relates to the use of a compound of formula I, IA, IB, IC, ID or IE as the free base or a salt thereof for the preparation of a pharmaceutical composition for the treatment of pain disorders. To further illustrate without limiting the invention, the pain disorder to be treated is selected from the group consisting of fibromyalgia syndrome (FMS), overall pain, back pain, shoulder pain, headache as well as pain while awake and during daily activities. To further illustrate without limiting the invention, an embodiment of the invention concerns the treatment of fibromyalgia syndrome; another embodiment concerns the treatment of overall pain; another embodiment concerns the treatment of back pain; another embodiment concerns the treatment of shoulder pain; another embodiment concerns the treatment of headache; another embodiment concerns the treatment of pain while awake and during daily activities.
In a further embodiment the present invention relates to the use of a compound of formula I, IA, IB, IC, ID or IE as the free base or a salt thereof for the preparation of a pharmaceutical composition for the treatment of attention deficit hyperactivity disorder.
In a further embodiment the present invention relates to the use of a compound of formula I, IA, IB, IC, ID or IE as the free base or a salt thereof for the preparation of a pharmaceutical composition for the treatment of stress urinary incontinence.
Pharmaceutical Composition
The compounds of the invention as the free base or the salt thereof may be administered alone or in combination with pharmaceutically acceptable carriers or excipients, in either single or multiple doses. The pharmaceutical compositions according to the invention may be formulated with pharmaceutically acceptable carriers or diluents as well as any other known adjuvants and excipients in accordance with conventional techniques such as those disclosed in Remington: The Science and Practice of Pharmacy, 19 Edition, Gennaro, Ed., Mack Publishing Co., Easton, Pa., 1995.
The pharmaceutical compositions may be specifically formulated for administration by any suitable route such as the oral, rectal, nasal, pulmonary, topical (including buccal and sublingual), transdermal, intracisternal, intraperitoneal, vaginal and parenteral (including subcutaneous, intramuscular, intrathecal, intravenous and intradermal) route, the oral route being preferred. It will be appreciated that the preferred route will depend on the general condition and age of the subject to be treated, the nature of the condition to be treated and the active ingredient chosen.
Pharmaceutical compositions for oral administration include solid dosage forms such as capsules, tablets, dragees, pills, lozenges, powders and granules. Where appropriate, they can be prepared with coatings such as enteric coatings or they can be formulated so as to provide controlled release of the active ingredient such as sustained or prolonged release according to methods well known in the art.
Liquid dosage forms for oral administration include solutions, emulsions, suspensions, syrups and elixirs.
Pharmaceutical compositions for parenteral administration include sterile aqueous and nonaqueous injectable solutions, dispersions, suspensions or emulsions as well as sterile powders to be reconstituted in sterile injectable solutions or dispersions prior to use. Depot injectable formulations are also contemplated as being within the scope of the present invention.
Other suitable administration forms include suppositories, sprays, ointments, cremes, gels, inhalants, dermal patches, implants, etc.
In an embodiment of the pharmaceutical composition, the compound of the invention administered in an amount of from about 0.001 to about 100 mg/kg body weight per day.
Conveniently, the compounds of the invention are administered in a unit dosage form containing said compounds in an amount of about 0.01 to 100 mg. The total daily dose is usually in the range of about 0.05-500 mg.
A typical oral dosage is in the range of from about 0.001 to about 100 mg/kg body weight per day, preferably from about 0.01 to about 50 mg/kg body weight per day, administered in one or more dosages such as 1 to 3 dosages. The exact dosage will depend upon the frequency and mode of administration, the sex, age, weight and general condition of the subject treated, the nature and severity of the condition treated and any concomitant diseases to be treated and other factors evident to those skilled in the art.
The formulations may conveniently be presented in unit dosage form by methods known to those skilled in the art. A typical unit dosage form for oral administration one or more times per day such as 1 to 3 times per day may contain from 0.01 to about 1000 mg, preferably from about 0.05 to about 500 mg, and more preferred from about 0.5 mg to about 200 mg.
For parenteral routes such as intravenous, intrathecal, intramuscular and similar administration, typically doses are in the order of about half the dose employed for oral administration.
The compounds of this invention are generally utilized as the free substance or as a salt such as a pharmaceutically acceptable salt thereof. One example is an acid addition salt of a compound having the utility of a free base. When a compound of the invention contains a free base such salts are prepared in a conventional manner by treating a solution or suspension of a free base of the invention with a chemical equivalent of an acid such as a pharmaceutically acceptable acid. Representative examples are mentioned above.
For parenteral administration, solutions of the compound of the invention in sterile aqueous solution, aqueous propylene glycol, aqueous vitamin E or sesame or peanut oil may be employed. Such aqueous solutions should be suitably buffered if necessary and the liquid diluent first rendered isotonic with sufficient saline or glucose. The aqueous solutions are particularly suitable for intravenous, intramuscular, subcutaneous and intraperitoneal administration. The sterile aqueous media employed are all readily available by standard techniques known to those skilled in the art.
Suitable pharmaceutical carriers include inert solid diluents or fillers, sterile aqueous solution and various organic solvents. Examples of solid carriers are lactose, terra alba, sucrose, cyclodextrin, talc, gelatine, agar, pectin, acacia, magnesium stearate, stearic acid and lower alkyl ethers of cellulose. Examples of liquid carriers are syrup, peanut oil, olive oil, phospho lipids, fatty acids, fatty acid amines, polyoxyethylene and water. Similarly, the carrier or diluent may include any sustained release material known in the art, such as glyceryl monostearate or glyceryl distearate, alone or mixed with a wax. The pharmaceutical compositions formed by combining the compound of the invention and the pharmaceutical acceptable carriers are then readily administered in a variety of dosage forms suitable for the disclosed routes of administration. The formulations may conveniently be presented in unit dosage form by methods known in the art of pharmacy.
Formulations of the present invention suitable for oral administration may be presented as discrete units such as capsules or tablets, each containing a predetermined. amount of the active ingredient, and which may include a suitable excipient. Furthermore, the orally available formulations may be in the form of a powder or granules, a solution or suspension in an aqueous or non-aqueous liquid, or an oil-in-water or water-in-oil liquid emulsion.
If a solid carrier is used for oral administration, the preparation may be tablette, e.g. placed in a hard gelatine capsule in powder or pellet form or e.g. in the form of a troche or lozenge. The amount of solid carrier may vary but will usually be from about 25 mg to about 1 g.
If a liquid carrier is used, the preparation may be in the form of a syrup, emulsion, soft gelatine capsule or sterile injectable liquid such as an aqueous or non-aqueous liquid suspension or solution.
The pharmaceutical formulations of the invention may be prepared by conventional methods in the art.
For example: Tablets may be prepared by mixing the active ingredient with ordinary adjuvants and/or diluents and subsequently compressing the mixture in a conventional tabletting machine. Examples of adjuvants or diluents comprise: Corn starch, potato starch, talcum, magnesium stearate, gelatine, lactose, gums, and the like. Any other adjuvants or additives usually used for such purposes such as colourings, flavourings, preservatives etc. may be used provided that they are compatible with the active ingredients.
Solutions for injections may be prepared by dissolving the active ingredient and possible additives in a part of the solvent for injection, preferably sterile water, adjusting the solution to the desired volume, sterilising the solution and filling it in suitable ampoules or vials. Any suitable additive conventionally used in the art may be added, such as tonicity agents, preservatives, antioxidants, etc.
In a further aspect the present invention relates to a method of preparing a compound of the invention as described in the following.
Methods of Preparation of the Compounds of the Invention
The compounds of the invention may be prepared as follows:
Method 1 (for compounds of formula IA) Alkylating an amine of formula III with an alkylating derivative of formula II:




where R1-R13 are as defined herein, and L is a leaving group such as e.g. halogen, mesylate or tosylate;

whereupon the compound of formula IA is isolated as the free base or a salt such as a pharmaceutically acceptable acid addition salt thereof.

Method 2 (for compounds of formula IA) Reduction of an amide derivative of formula IV:




where R1-R13 are as defined herein;

whereupon the compound of formula IA is isolated as the free base or a salt such as a pharmaceutically acceptable acid addition salt thereof.

Method 3 (for compounds of formula IA, also for compounds of formula IB when R12 ≠hydrogen) Reacting an indole of formula V with a reagent of formula VI by the use of a catalyst:




where R1-R13 are as defined herein;

whereupon the compound of formula IA or the compound of formula IB when R12≠hydrogen is isolated as the free base or a salt such as a pharmaceutically acceptable acid addition salt thereof.

Method 4 (for compounds of formula IC) Reduction of an amide derivative of formula VII:




where R1-R13 are as defined herein;

whereupon the compound of formula IC is isolated as the free base or a salt such as a pharmaceutically acceptable acid addition salt thereof.

Method 5 (for compounds of formula ID) Reduction of an amide derivative of formula VIII:




where R1-R13 are as defined herein;

whereupon the compound of formula ID is isolated as the free base or a salt such as a pharmaceutically acceptable acid addition salt thereof.

Method 6 (for compounds of formula IE) Reduction of an amide derivative of formula IX:




where R1-R13 are as defined herein;

whereupon the compound of formula IE is isolated as the free base or a salt such as a pharmaceutically acceptable acid addition salt thereof.

Method 7 (for compounds of formula IF) Reduction of an am ide derivative of formula X:




where R1-R13 are as defined herein;

whereupon the compound of formula IF is isolated as the free base or a salt such as a pharmaceutically acceptable acid addition salt thereof.

Method 8 (for compounds of formula IB with R12=hydrogen) Reduction of an amide derivative of formula XI:




where R1-R13 are as defined herein;

whereupon the compound of formula IB is isolated as the free base or a salt such as a pharmaceutically acceptable acid addition salt thereof.

Method 9 (for compounds of formula IC with R2=hydrogen) Deprotection of a compound of formula XII:




where R1, R3-R13 are as defined herein and R′ is a protection group such as a carbamate (such as methyl-, ethyl-, tert-butyl-, allyl-, or benzyl-carbamate);

whereupon the compound of formula IC is isolated as the free base or a salt such as a pharmaceutically acceptable acid addition salt thereof.

Method 10 (for compounds of formula ID with R2=hydrogen) Deprotection of a compound of formula XIII:




where R1, R3-R13 are as defined herein and R′ is a protection group such as a carbamate (such as methyl-, ethyl-, tert-butyl-, allyl-, or benzyl-carbamate);

whereupon the compound of formula ID is isolated as the free base or a salt such as a pharmaceutically acceptable acid addition salt thereof.

Method 11 (for compounds of formula IE with R2=hydrogen) Deprotection of a compound of formula XIV:




where R1, R3-R13 are as defined herein and R′ is a protection group such as a carbamate (such as methyl-, ethyl-, tert-butyl-, allyl-, or benzyl-carbamate);

whereupon the compound of formula IE is isolated as the free base or a salt such as a pharmaceutically acceptable acid addition salt thereof.

Method 12 (for compounds of formula IF with R2=hydrogen) Deprotection of a compound of formula XV:




where R1, R3-R13 are as defined herein and R′ is a protection group such as a carbamate (such as methyl-, ethyl-, tert-butyl-, allyl-, or benzyl-carbamate);

whereupon the compound of formula IF is isolated as the free base or a salt such as a pharmaceutically acceptable acid addition salt thereof.

The alkylation according to method 1 is conveniently performed in an organic solvent such as a suitably boiling alcohol or ketone, preferably in the presence of an organic or inorganic base (potassium carbonate, duisopropylethylamine or triethylamine) at reflux temperature. Alternatively, the alkylation can be performed at a fixed temperature, which is different from the boiling point, in one of the above-mentioned solvents or in dim ethyl formamide (DMF), dimethylsulfoxide (DMSO), or N-methylpyrrolidin-2-one (NMP), preferably in the presence of a base. The alkylating derivatives of formula II can be derived from the corresponding benzylic alcohols which in turn are synthesised from the corresponding benzoic acids by standard reduction methods e.g. by the use of lithium aluminium hydride. The corresponding benzoic acids can be synthesised by methods analogous to those described in e.g. Hamel, P.; Girard, M.; Tsou, N. N.; J. Heterocycl. Chem.; 36, 1999, 643-652. The amines of formula III are commercially available.
The reduction according to method 2 is performed by standard literature methods i.e. by the use of a reducing agent like borane, alane or lithium aluminium hydride. Amides of the formula V can be prepared by coupling of the corresponding benzoic acids (synthesised by methods analogous to those described in e.g. Hamel, P.; Girard, M.; Tsou, N. N.; J. Heterocycl. Chem.; 36, 1999, 643-652 and Hamel, P.; Zajac, N.; Atkinson, J. G.; Girard, Y.; J. Org. Chem.; 59; 21; 1994; 6372-6377) with an amine of formula III by standard methods e.g. via the carboxylic acid chloride or activated esters or by the use of carboxylic acids in combination with a coupling reagent such as e.g. dicyclohexyl carbodiimide.
The reaction in method 3 can be performed by reacting a N-alkyl-2,3-dihydro-benzo[d]isothiazole of formula VI with an indole of formula V in the presence of an activating agent like e.g. an lewis acid or e.g. an oxidising agent like e.g. N-chlorosuccinimide. N-Alkyl-2,3-dihydro-benzo[d]isothiazoles of formula VI can be prepared by methods analogous to those described in the literature e.g. Hoffmann, R. W.; Goldmann, S.; Chem. Ber. 111, 1978, 2716-2725 and Kanakarajan, K.; Meier, H.; Angew. Chem. 96, 1984, 220. Indoles of formula V are either commercially available or can be prepared by standard methods as described in standard works like e.g. Houben-Weyl, Methoden der organischen Chemie (Methods of Organic Chemistry), Georg-Thieme-Verlag, Stuttgart and Organic Reactions, John Wiley & Sons, Inc. New York.
The reduction according to method 4 is performed by standard literature methods i.e. by the use of a reducing agent like borane, alane or lithium aluminium hydride. Amides of the formula VII can be prepared by coupling of the corresponding 2-mercapto-benzamides (synthesised by reduction of the corresponding 2,2′-dithiobenzamides analogous to those described in e.g. Elworthy, T. R.; Ford, A. P. D. W.; Bantle, G. W.; Morgans, D. J.; Ozer, R. S.; et al. J. Med. Chem. 40, 1997, 2674-2687) with a 4-halo- or 4-pseudohalo indole by methods analogous to those described in the literature e.g. Schopfer, U.; Schlapbach, A. Tetrahedron; 57, 2001, 3069-3073, where “halo” is either bromo or iodo or “pseudohalo” is e.g. triflate or nonaflate. When R13=hydrogen in formula VII, then this position is protected prior to the coupling reaction and deprotected after the coupling reaction according to standard literature procedures with standard protection groups, e.g. a 4-methyl-phenyl-sulfonyl group or a tert-butoxy-carbonyl group.
The reduction according to method 5 is performed by standard literature methods i.e. by the use of a reducing agent like borane, alane or lithium aluminium hydride. Amides of the formula VIII can be prepared by coupling of the corresponding 2-mercapto-benzamides (synthesised by reduction of the corresponding 2,2′-dithiobenzamides analogous to those described in e.g. Elworthy, T. R.; Ford, A. P. D. W.; Bantle, G. W.; Morgans, D. J.; Ozer, R. S.; et al. J. Med. Chem. 40, 1997, 2674-2687) with a 5-halo- or 5-pseudohalo indole by methods analogous to those described in the literature e.g. Schopfer, U.; Schlapbach, A. Tetrahedron; 57, 2001, 3069-3073, where “halo” is either bromo or iodo or “pseudohalo” is e.g. triflate or nonaflate. When R13=hydrogen in formula VIII, then this position is protected prior to the coupling reaction and deprotected after the coupling reaction according to standard literature procedures with standard protection groups, e.g. a 4-methyl-phenyl-sulfonyl group or a tert-butoxy-carbonyl group.
The reduction according to method 6 is performed by standard literature methods i.e. by the use of a reducing agent like borane, alane or lithium aluminium hydride. Amides of the formula IX can be prepared by coupling of the corresponding 2-mercapto-benzamides (synthesised by reduction of the corresponding 2,2′-dithiobenzamides analogous to those described in e.g. Elworthy, Todd R.; Ford, Anthony P. D. W.; Bantle, Gary W.; Morgans, David J.; Ozer, Rachel S.; et al. J. Med. Chem. 40, 1997, 2674-2687) with a 6-halo- or 6-pseudohalo indole by methods analogous to those described in the literature e.g. Schopfer, U.; Schlapbach, A. Tetrahedron; 57, 2001, 3069-3073, where “halo” is either bromo or iodo or “pseudohalo” is e.g. triflate or nonaflate. When R13=hydrogen in formula IX, then this position is protected prior to the coupling reaction and deprotected after the coupling reaction according to standard literature procedures with standard protection groups, e.g. a 4-methyl-phenyl-sulfonyl group or a tert-butoxy-carbonyl group.
The reduction according to method 7 is performed by standard literature methods i.e. by the use of a reducing agent like borane, alane or lithium aluminium hydride. Amides of the formula X can be prepared by coupling of the corresponding 2-mercapto-benzamides (synthesised by reduction of the corresponding 2,2′-dithiobenzamides analogous to those described in e.g. Elworthy, T. R.; Ford, A. P. D. W.; Bantle, G. W.; Morgans, D. J.; Ozer, R. S.;et al. J. Med. Chem. 40, 1997, 2674-2687) with a 7-halo- or 7-pseudohalo indole by methods analogous to those described in the literature e.g. Schopfer, U.; Schlapbach, A. Tetrahedron; 57, 2001, 3069-3073, where “halo” is either bromo or iodo or “pseudohalo” is e.g. triflate or nonaflate. When R13=hydrogen in formula X, then this position is protected prior to the coupling reaction and deprotected after the coupling reaction according to standard literature procedures with standard protection groups, e.g. a 4-methyl-phenyl-sulfonyl group or a tert-butoxy-carbonyl group.
The reduction according to method 8 is performed by standard literature methods i.e. by the use of a reducing agent like borane, alane or lithium aluminium hydride. Amides of the formula X can be prepared by acidic rearrangement (e.g. treatment inma solution of trifluoroacetic acid) of amides of formula IV analogous to methods described in the literature (Hamel, P.; Girard, M.; Tsou, N. N.; J. Heterocyclic Chem. 36, 1999, 643-652; Hamel, P.; Girard, Y.; Atkinson, J. G.; J. Org. Chem. 57, 1992; 2694-2699).
The deprotection according to method 9 can be performed by standard techniques, known to the persons skilled in the art and detailed in the textbook Protective Groups in Organic Synthesis Greene, T. W.; Wuts, P. G. M. Wiley Interscience, (1991) ISBN 0471623016. The protected amine can be prepared in a similar manner as described in the literature by reaction of properly substituted (2-mercapto-benzyl)-methyl-carbamic acid ester with properly substituted 4-halo indole or 4-pseudohalo indole, where “halo” is either bromo or iodo and “pseudohalo” is e.g. triflate or nonaflate, according to Schopfer, H.; Schlapbach, U.; Tetrahedron 2001, 57, 3069-3073. When R13=hydrogen in formula XII, then this position is protected prior to the coupling reaction and deprotected after the coupling reaction according to standard literature procedures with standard protection groups, e.g. a 4-methyl-phenyl-sulfonyl group or a tert-butoxy-carbonyl group. The properly substituted (2-mercapto-benzyl)-methyl-carbamic acid ester can be prepared from the properly substituted (2-bromo-benzyl)-methyl-carbamic acid ester or properly substituted (2-iodo-benzyl)-methyl-carbamic acid ester in a palladium catalysed coupling reaction with a trialkylsilane thiol with subsequent desilylation with a fluoride donor such as tetrabutylammonium fluoride (Winn, M.; et al. J. Med. Chem. 2001, 44, 4393-4403).
The deprotection according to method 10 can be performed as described in method 9. The protected amine can be prepared from the properly substituted (2-mercapto-benzyl)-methyl-carbamic acid ester and the properly substituted 5-halo indole or 5-pseudohalo indole, where “halo” is either bromo or iodo and “pseudohalo” is e.g. triflate or nonaflate, as described in method 9. When R13=hydrogen in formula XIII, then this position is protected prior to the coupling reaction and deprotected after the coupling reaction according to standard literature procedures with standard protection groups, e.g. a 4-methyl-phenyl-sulfonyl group or a tert-butoxy-carbonyl group.
The deprotection according to method 11 can be performed as described in method 9. The protected amine can be prepared from the properly substituted (2-mercapto-benzyl)-methyl-carbamic acid ester and the properly substituted 6-halo indole or 6-pseudohalo indole, where “halo” is either bromo or iodo and “pseudohalo” is e.g. triflate or nonaflate, as described in method 9. When R13=hydrogen in formula XIV, then this position is protected prior to the coupling reaction and deprotected after the coupling reaction according to standard literature procedures with standard protection groups, e.g. a 4-methyl-phenyl-sulfonyl group or a tert-butoxy-carbonyl group.
The deprotection according to method 12 can be performed as described in method 9. The protected amine can be prepared from the properly substituted (2-mercapto-benzyl)-methyl-carbamic acid ester and the properly substituted 7-halo indole or 7-pseudohalo indole, where “halo” is either bromo or iodo and “pseudohalo” is e.g. triflate or nonaflate, as described in method 9. When R13=hydrogen in formula XV, then this position is protected prior to the coupling reaction and deprotected after the coupling reaction according to standard literature procedures with standard protection groups, e.g. a 4-methyl-phenyl-sulfonyl group or a tert-butoxy-carbonyl group.
The invention disclosed herein is further illustrated by the following non-limiting examples.
EXAMPLES
General Methods
Analytical LC-MS data were obtained on a PE Sciex API 150EX instrument equipped with photoionization (APPI) ion source and Shimadzu LC-8A/SLC-10A LC system. The LC conditions (Symmetry C18 column 4.6×30 mm with a particle size of 3.5 μm) were linear gradient elution with eluents A (water containing 0.05% TFA) and B (acetonitrile containing 5% water and 0.035% TFA). Gradient (time[min]/%B): (0.00/10.0); (4.00/100.0); (4.10/10.0); (5.00/10.0) with 2 mL/min. Purity was determined by integration of the UV trace (254 nm) and ELS (SEDERE SEDEX 55 with Heto CBN 8-30 cooling bath). The retention times, Rt, are expressed in minutes.
Mass spectra were obtained by an alternating scan method to give molecular weight information. The molecular ion, MH+, was obtained at low orifice voltage (5V) and fragmentation at high orifice voltage (100V).
Preparative LC-MS-separation was performed on the same instrument. The LC conditions (Symmetry C18 column 10×50 mm) were linear gradient elution with eluents A (water containing 0.05% TFA) and B (acetonitrile containing 5% water and 0.035% TFA): (time[min]/%B): (0.00/20.0); (7.00/100.0); (7.10/20.0); (8.00/20.0) with 5.7 mL/min Fraction collection was performed by split-flow MS detection.
For column chromatography silica gel of formula Kieselgel 60, 230-400 mesh ASTM was used. For ion-exchange chromatography (SCX, 1 g, Varian Mega Bond Elut®, Chrompack cat. No. 220776) was used. Prior to use the SCX-columns were pre-conditioned with 10% solution of acetic acid in methanol (3 mL).
Preparation of Intermediates
Example 1
2-(1H-Indol-3-ylsulfanyl)-N,N-dimethyl benzamide
N,N,N′,N′-Tetramethyl-2,2′-dithiodibenzamide (Elworthy, Todd R.; Ford, Anthony P. D. W.; Bantle, Gary W.; Morgans, David J.; Ozer, Rachel S.; et al. J. Med. Chem. 40, 1997, 2674-2687) (12.80 g, 35.5 mmol) was dissolved in 1,2-dichloroethane (200 mL) under Ar, and sulfurylchloride (2.9 mL, 4.84 g, 35.9 mmol) was carefully added with stirring under Ar. The reaction mixture was stirred for 15 min at room temperature and the resulting solution was added slowly (dropwise) to an icecold solution (0° C.) of indole (8.4 g, 71.7 mmol) in dry DMF (180 mL) under Ar. The mixture was stirred at 0° C. under Ar for 2.5 hours and then quenched by addition of water (180 mL) and sat. aqueous NaHCO3 (150 mL). To the resulting emulsion was added ethyl acetate (250 mL). The organic phases were combined and washed with brine (100 mL). The water phase was further extracted with ethyl acetate (2×100 mL) and the combined organic phases were washed with brine and dried over MgSO4 and evaporated in vacuo to a dark orange oil which crystallized upon standing. The product was purified and isolated by recrystallisation (acetonitrile) to give 5.53 g (26%) crystalline product (m.p. 195.6-197.6° C.). From the motherliq. was further 4.45 g (21%) product isolated (m.p. 194.3-196.4° C.).
The following compounds were prepared in a similar way:

    2-(4-Chloro-1H-indol-3-ylsulfanyl)-N,N-dimethylbenzamide
    2-(4-Fluoro-1H-indol-3-ylsulfanyl)-N,N-dimethylbenzamide
    2-(4-Fluoro-1H-indol-3-ylsulfanyl)-N,N-dimethylbenzamide
    2-(5-Fluoro-1H-indol-3-ylsulfanyl)-N,N-dimethylbenzamide
    2-(5-Chloro-1H-indol-3-ylsulfanyl)-N,N-dimethylbenzamide
    N,N-Dimethyl-2-(7-methyl-1H-indol-3-ylsulfanyl)benzamide
    2-(5-Methoxy-1H-indol-3-ylsulfanyl)-N,N-dimethylbenzamide
    2-(6-Fluoro-1H-indol-3-ylsulfanyl)-N,N-dimethylbenzamide
    2-(6-Chloro-1H-indol-3-ylsulfanyl)-N,N-dimethylbenzamide
    N,N-Dimethyl-2-(2-methyl-1H-indol-3-ylsulfanyl)benzamide
    2-(6-Hydroxy-1H-indol-3-ylsulfanyl)-N,N-dimethylbenzamide
    2-(7-Methoxy-1H-indol-3-ylsulfanyl)-N,N-dimethylbenzamide
    N,N-Dimethyl-2-(4-methyl-1H-indol-3-ylsulfanyl)benzamide
    N,N-Dimethyl-2-(7-nitro-1H-indol-3-ylsulfanyl)benzamide
    2-(4-Hydroxy-1H-indol-3-ylsulfanyl)-N,N-dimethylbenzamide
    2-(4-Cyano-1H-indol-3-ylsulfanyl)-N,N-dimethylbenzamide
    2-(6-Cyano-1H-indol-3-ylsulfanyl)-N,N-dimethylbenzamide
    2-(7-Chloro-1H-indol-3-ylsulfanyl)-N,N-dimethylbenzamide
    2-(6-Methoxy-1H-indol-3-ylsulfanyl)-N,N-dimethylbenzamide
    N,N-Dimethyl-2-(1-methyl-1H-indol-3-ylsulfanyl)benzamide
    2-(4-Methoxy-1H-indol-3-ylsulfanyl)-N,N-dimethylbenzamide
    N,N-Dimethyl-2-(6-methyl-1H-indol-3-ylsulfanyl)benzamide


Example 2
2-(1H-Indol-3-ylsulfanyl)-N-methylbenzamide
Carbonyldiimidazole (11 mmol) was added to a solution of 2-(1H-indol-3-ylsulfanyl) benzoic acid (Hamel, P.; Girard, M.; Tsou, N. N.; J. Heterocycl. Chem. 36, 1999, 643-652) (10 mmol) in dry THF (200 mL) and refluxed for 60 minutes under argon. Methyl amine (1M in THF; 40 ml) was added slowly to the reaction mixture and the mixture was stirred at room temperature for 16 hours. The mixture was evaporated in vacuo and the product purified by column chromatography on silica gel using ethyl acetate as an eluent.
The following compounds were prepared in a similar way:

    2-(5-Fluoro-1H-indol-3-ylsulfanyl)-N-methyl benzamide
    2-(6-Fluoro-1H-indol-3-ylsulfanyl)-N-methyl benzamide
    2-(2-Methyl-1H-indol-3-ylsulfanyl)-N-methyl benzamide
    2-(4-Methyl-1H-indol-3-ylsulfanyl)-N-methyl benzamide
    2-(4-Chloro-1H-indol-3-ylsulfanyl)-N-methyl benzamide


Example 3
(2-mercapto-benzyl)-methyl-carbamic acid tert-butyl ester
(2-Iodo-benzyl)-methyl-carbamic acid tert-butyl ester (5.0 g, 14.4 mmol) in dry toluene (30 mL) was placed in two Emrys Optimizer EXP 20 mL tubes. To each tube tris(dibenzylideneacetone)dipalladium (66 mg, 0.072 mmol), bis(2-diphenylphosphinophenyl)ether (78 mg, 0.14 mmol), triisopropylsilanethiol (1.44 g, 7.56 mmol) and sodium tert-butoxide (900 mg, 9.36 mmol) were added sequentially. The tubes were sealed and subjected to microwave heating at 160° C. for 15 minutes. After cooling the mixture, the product was eluted through a plug of silica with ethyl acetate-heptane (1:10) to give 5.2 g (88%) of methyl-(2-triisopropylsilanylsulfanyl-benzyl)-carbamic acid tert-butyl ester. This product was dissolved in THF (70 mL) and cooled to 0° C. Tetrabutylammonium fluoride trihydrate (4.21 g, 13.3 mmol) dissolved in THF (40 mL) was added dropwise at 0° C. and the mixture was stirred at this temperature for 15 minutes. The crude mixture was poured onto a plug of silica gel and the product was eluted with ethyl acetate-heptane (1:2) to give 3.2 g (100%) of (2-mercapto-benzyl)-methyl-carbamic acid tert-butyl ester contaminated with traces of triisopropylsilane fluoride.
Example 4
Compounds of the Invention of formula I
Synthiesis of


    1. [2-(1H-Indol-3-ylsulfanyl)benzyl]dimetlhyl amine


2-(1-Indol-3-ylsulfanyl)-N,N-dimethyl benzamide (1 mmol) was dissolved in dry tetrahydrofuran (30 mL). To the mixture was added 3 mL 1 M borane in tetrahydrofuran and the mixture was stirred at room temperature for 24 hours. Methanol (5 mL) was added and the mixture stirred at room temperature for 30 min and then evaporated in vacuo. The mixture was redissolved in ethyl acetate (100 mL) and washed with saturated sodium hydrogen carbonate (20 mL), dried over anhydrous MgSO4 and evaporated in vacuo. The product was crystallized as an oxalate salt by dissolution in acetone and addition of one equivalent of oxalic acid.
The following compounds were prepared in a similar way and analytical data are shown in table 1.:

    2. [2-(5-cyano-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    3. [2-(4-Fluoro-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    4. [2-(4-Chloro-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    5. [2-(5-Fluoro-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    6. [2-(5-Chloro-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    7. Dimethyl-[2-(7-methyl-1H-indol-3-ylsulfanyl)benzyl]amine
    8. [2-(7-Methoxy-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    9. [2-(5-Methoxy-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    10. [2-(6-Fluoro-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    11. [2-(6-Chloro-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    12. Dimethyl-[2-(2-methyl-1H-indol-3-ylsulfanyl)benzyl]amine
    13. Dimethyl-[2-(6-methyl-1H-indol-3-ylsulfanyl)benzyl]amine
    14. [2-(4-cyano-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    15. Dimethyl-[2-(1-methyl-1H-indol-3-ylsulfanyl)benzyl]amine
    16. Dimethyl-[2-(4-methyl-1H-indol-3-ylsulfanyl)benzyl]amine
    17. Dimethyl-[2-(4-hydroxy-1H-indol-3-ylsulfanyl)benzyl]amine
    18. [2-(6-cyano-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    19. [2-(7-Chloro-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    20. [2-(6-Methoxy-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine
    21. [2-(4-Methoxy-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine


Example 5
Compounds of Formula I
Synthesis of


    22. [2-(1H-Indol-3-ylsulfanyl)benzyl]metlyl amine


2-Methyl-2,3-dihydro-benzoisothiazole (VI) (Hoffmann, R. W.; Goldman, S. Chem. Ber. 111, 1978, 2716-2725) (75 mg, 0.50 mmol) was dissolved in THF (1 mL) and added to indole (V) (140 mg, 0.60 mmol) under Ar. Tricloroacetic acid (90 mg, 0.55 mmol) was added and the reaction mixture was stirred at room temperature for 16 hours. 2 mL 1N NaOH (aq) was added. Extraction with ethyl acetate (2×10 mL) and purification by flash chromatography on silica gel (eluent: ethyl acetate then ethyl acetate/methanol/triethylamine) gave 88 mg [2-(1H-Indol-3-ylsulfanyl)benzyl]methylamine (67% yield).
The following compounds were prepared in a similar way and analytical data are shown in Table 1:

    23. [2-(6-Fluoro-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    24. [2-(5-Fluoro-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    25. Methyl-[2-(4-methyl-1H-indol-3-ylsulfanyl)benzyl]amine
    26. [2-(4-Chloro-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    27. Methyl-[2-(2-methyl-1H-indol-3-ylsulfanyl)benzyl]amine
    28. [2-(5-Fluoro-2-methyl-1H-indol-3-ylsulfanyl)-benzyl]methyl amine
    29. Methyl-[2-(5-methyl-1H-indol-3-ylsulfanyl)benzyl]amine
    30. Methyl-[2-(7-methyl-1H-indol-3-ylsulfanyl)benzyl]amine
    31. [2-(4-Fluoro-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    32. [2-(7-Ethyl-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    33. [2-(6-Methoxy-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    34. [2-(5-Chloro-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    35. [2-(6-Chloro-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    36. [2-(5-Methoxy-4-methyl-1H-indol-3-ylsulfanyl)-benzyl]methyl amine
    37. [2-(5,6-Dimethoxy-1H-indol-3-ylsulfanyl)-benzyl]methyl amine
    38. [2-(6-Bromo-1H-indol-3-ylsulfanyl)-benzyl]methyl amine
    39. Methyl-[2-(6-methyl-1H-indol-3-ylsulfanyl)-benzyl]amine
    40. [2-(4,7-Dimethoxy-1H-indol-3-ylsulfanyl)-benzyl]methyl amine
    41. [2-(5-Methoxy-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    42. [2-(4-Methoxy-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    43. [2-(5-Bromo-1H-indol-3-ylsulfanyl)-benzyl]methyl amine
    44. [2-(7-Methoxy-1H-indol-3-ylsulfanyl)benzyl]methyl amine
    45. [5-Chloro-2-(1H-indol-3-ylsulfanyl)-benzyl]methyl amine
    46. Methyl-[2-(6-trifluoromethyl-1H-indol-3-ylsulfanyl)-benzyl]amine
    47. [5-Hydroxy-2-(1H-indol-3-ylsulfanyl)-benzyl]methyl amine
    48. [2-(4-Bromo-1H-indol-3-ylsulfanyl)-benzyl]methyl amine
    49. [2-(7-Chloro-1H-indol-3-ylsulfanyl)-benzyl]methyl amine
    50. [2-(5-Iodo-1H-indol-3-ylsulfanyl)-benzyl]methyl amine
    51. [2-(6-Cyano-1H-indol-3-ylsulfanyl)-benzyl]methyl amine
    52. [2-(1H-Indol-3-ylsulfanyl)-5-methyl-benzyl]methyl amine
    53. [2-(3-methyl-1H-indol-2-ylsulfanyl)-benzyl]methyl amine
    54. [2-(5,6-Dimethoxy-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine
    55. [5-Fluoro-2-(3-methyl-1H-indol-2-ylsulfanyl)-benzyl]-methyl-amine
    56. [5-Fluoro-2-(4-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    57. [2-(4-Chloro-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine
    58. [2-(7-Chloro-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine
    59. [5-Fluoro-2-(6-trifluoromethyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    60. [5-Fluoro-2-(7-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    61. [2-(4-Bromo-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine
    62. 3-(4-Fluoro-2-methylaminomethyl-phenylsulfanyl)-2-methyl-1H-indol-4-ol
    63. 3-(4-Fluoro-2-methylaminomethyl-phenylsulfanyl)-1H-indol-6-ol
    64. [5-Fluoro-2-(5-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    65. [5-Fluoro-2-(4-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    66. [2-(6-Chloro-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine
    67. [2-(5-Chloro-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine
    68. [5-Fluoro-2-(6-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    69. [5-Fluoro-2-(5-methoxy-4-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    70. [2-(5-Bromo-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine
    71. [5-Fluoro-2-(5-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    72. [2-(6-Bromo-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine
    73. [5-Fluoro-2-(6-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    74. [5-Fluoro-2-(6-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    75. [5-Fluoro-2-(2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    76. [5-Fluoro-2-(5-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    77. [5-Fluoro-2-(4-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    78. [5-Fluoro-2-(7-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    79. [5-Fluoro-2-(1-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    80. [5-Fluoro-2-(5-fluoro-2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    81. [5-Chloro-2-(5-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    82. [5-Chloro-2-(5-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    83. [5-Chloro-2-(7-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    84. [5-Chloro-2-(1-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    85. [5-Chloro-2-(4-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    86. [5-Chloro-2-(7-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    87. [5-Chloro-2-(6-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    88. [5-Chloro-2-(5-fluoro-2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    89. [2-(5-Fluoro-2-methyl-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine
    90. Methyl-[5-methyl-2-(4-methyl-1H-indol-3-ylsulfanyl)-benzyl]-amine
    91. [2-(7-Ethyl-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine
    92. [2-(6-Methoxy-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine
    93. Methyl-[5-methyl-2-(2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-amine
    94. [2-(4-Methoxy-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine
    95. [2-(6-Bromo-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine
    96. [2-(6-Fluoro-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine
    97. [2-(4-Fluoro-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine
    98. 3-(4-Methyl-2-methylaminomethyl-phenylsulfanyl)-1H-indol-6-ol
    99. [5-Chloro-2-(5-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    100. [2-(6-Chloro-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine
    101. [2-(5-Chloro-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine
    105. [4-Chloro-2-(6-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    106. [4-Chloro-2-(2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    107. [4-Chloro-2-(5-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    108. [4-Chloro-2-(7-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    109. [4-Chloro-2-(4-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    110. [4-Chloro-2-(5-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    111. [4-Chloro-2-(6-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    112. [4-Chloro-2-(4-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    113. [4-Chloro-2-(7-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    114. [4-Chloro-2-(7-ethyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    115. [4-Chloro-2-(5-methoxy-4-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    116. [4-Chloro-2-(5-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    117. [4-Chloro-2-(6-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    118. [4-Chloro-2-(7-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    119. [4-Chloro-2-(4-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    120. [4-Chloro-2-(5-chloro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    121. [4-Chloro-2-(6-chloro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    122. [4-Chloro-2-(4-chloro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    123. [4-Chloro-2-(7-chloro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    124. [4-Chloro-2-(1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    125. [4-Chloro-2-(1-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    126. [4-Chloro-2-(3-methyl-1H-indol-2-ylsulfanyl)-benzyl]-methyl-amine
    127. [4-Chloro-2-(5-fluoro-2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    129. [2-(5-Fluoro-4-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    130. [2-(4,5-Difluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    131. [2-(4,6-Difluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    132. 3-(2-Methylaminomethyl-phenylsulfanyl)-1H-indol-4-ol
    134. [2-(5,6-Difluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine
    135. 6-Fluoro-3-(2-methylaminomethyl-phenylsulfanyl)-1H-indol-5-ol
    136. [2-(4-Chloro-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine


Example 6
Compounds of Formula I
Syntlhesis of


    102. 5-Fluoro-3-(2-piperidin-1-ylmethyl-phenylsulfanyl)-1H-indole


6 mL conc. H2SO4 was added to 2,2′-dithiodibenzoic acid (20 g, 65.3 mmol) in 150 mL methanol. The reaction mixture was refluxed for three days, cooled to room temperature and neutralized with sat. aqueous NaHCO3. Methanol was removed in vacuo. The residue was extracted with ethyl acetate. The organic phase was washed with brine, dried with MgSO4 and concentrated in vacuo to give 17.8 g dimethyl 2,2′-dithiodibenzoic acid ester (53.2 mmol, 82%). 1.20 mL Sulfurylchloride (15 mmol) was added to 5.00 g dimethyl 2,2′-dithiodibenzoic acid ester (15 mmol) in 40 mL dry 1,2-dichloroethane under Ar at 0° C. The reaction mixture was stirred 15 min at room temperature and added to 4.10 g fluoro-1H-indole (30.3 mmol) in 50 mL dry THF under Ar. The reaction mixture was stirred for 2 hours at room temperature and then quenched by addition of sat. aqueous NaHCO3. Ethyl acetate was added, the two phases were separated and the organic phase was washed with brine, dried with MgSO4 and concentrated in vacuo. 8.30 g 2-(5-Fluoro-1H-indol-3-ylsulfanyl)-benzoic acid methyl ester (27.5 mmol, 92%) was isolated after flash chromatography on silica gel. 4.15 g 2-(5-Fluoro-1H-indol-3-ylsulfanyl)-benzoic acid methyl ester (13.8 mmol) in 50 mL dry THF was added dropwise to 0.58 g LiAlH4 (15.4 mmol) in 20 mL dry diethyl ether at 0° C. 150 mL dry THF was added and the reaction mixture was stirred 16 hours at room temperature. The raction was quenched with 1 mL water and 1 mL 2N NaOH. The reaction mixture was stirred for 1 hour, then 2.5 mL water was added and stirring was continued for another hour. The mixture was filtered, dried with MgSO4 and concentrated in vacuo to give 3.00 g 2-(5-fluoro-1H-indol-3-ylsulfanyl)-phenyl]-methanol (11.0 mmol, 80%). 0.275 g p-Toluenesulfonylchloride (1.44 mmol) was added to 0.375g 2-(5-fluoro-1H-indol-3-ylsulfanyl)-phenyl]-methanol (1.37 mmol) in 5 mL dry THF at 0° C. The reaction mixture was stirred 2 hours at 0° C. and then added to 2.75 mmol piperidine in 10 mL dry THF and stirred 16 hours at room temperature. Water and ethyl acetate were added to the reaction mixture. The two phases were separated and the organic phase was washed with brine, dried with MgSO4 and concentrated in vacuo. 5-Fluoro-3-(2-piperidin-1-ylmethyl-phenylsulfanyl)-1H-indole was isolated after flash chromatography.
The following compounds were prepared in a similar way and analytical data are shown in Table 1:

    103. 5-Fluoro-3-(2-morpholin-4-ylmethyl-phenylsulfanyl)-1H-indole
    104. 5-Fluoro-3-(2-pyrrolidin-1-ylmethyl-phenylsulfanyl)-1H-indole


Example 7
Compounds of Formula I
Synthesis of


    128. 2-(5-Fluoro-1H-indol-3-ylsulfanyl)-benzylamine


4.50 g NaBH4 (119 mmol) was added in portions to 7.50 g allyl bromide (62.0 mmol) and 8.35 g 2,2′-dithiodibenzamide (27.4 mmol, prepared from 2,2′-dithiodibenzoic acid via 2,2′-dithiodibenzoic acid chloride) in 80 mL methanol at 0° C. The reaction mixture was stirred I hour at room temperature. 50 mL IN HCl was added and stirring was continued 1 hour. Methanol was removed in vacuo. The residue was extracted with ethyl acetate. The organic phase was washed with brine, dried with MgSO4 and concentrated in vacuo to give 10.0 g 2-allylsulfanyl-benzamide (51.7 mmol, 94%). 2.1 g LiAlH4 (55 mmol) was added to 6.0 g 2-allylsulfanyl-benzamide (31 mmol) in 50 mL dry THF at 0° C. The reaction mixture was stirred for 16 hours at room temperature. The reaction was quenched with 4 mL water and 3 mL 2N NaOH. The reaction mixture was stirred for 1 hour, then 9 mL water was added and stirring was continued for another hour. The mixture was filtered, dried with MgSO4 and concentrated in vacuo to give 5.05 g 2-allylsulfanyl-benzylamine (28.2 mmol, 91%). 2.05 g Di-tert-butyl dicarbonate (9.37 mmol) was added to 1.40 g 2-allylsulfanyl-benzylamine (7.81 mmol) and a catalytic amount of N,N-dimethyl-4-amino pyridine in 20 mL THF. The reaction mixture was stirred for 15 minutes at room temperature. 10 mL 20% citric acid was added and the reaction mixture was stirred for 30 minutes. The reaction mixture was extracted with ethyl acetate, the two phases were separated and the organic phase was washed with brine, dried with MgSO4 and concentrated in vacuo to give (2-allylsulfanyl-benzyl)-carbamic acid tert-butyl ester in quantitative yield. 0.70g NalO4 (3.3 mmol) in 20 mL water was added to 0.75 g (2-allylsulfanyl-benzyl)-carbamic acid tert-butyl ester (2.7 mmol) in 20 mL methanol and stirred for 2 hours at room temperature. The reaction mixture was filtered and methanol was removed in vacuo. The residue was extracted with ethyl acetate. The organic phase was washed with brine, dried with MgSO4 and concentrated in vacuo. The residue was redissolved in 5 mL THF and added to 0.50 g fluoro-1H-indole (3.7 mmol) and 0.65 g trichloro acetic acid (4.0 mmol) in 5 mL THF and stirred for 16 hours at 50° C. Sat. aqueous NaHCO3 and ethyl acetate was added, the two phases were separated and the organic phase was washed with brine, dried with MgSO4 and concentrated in vacuo. The residue was purified by flash chromatography and 0.157 g [2-(5-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-carbamic acid tert-butyl ester (0.42 mmol, 16%) was isolated after recrystallization from ethyl acetate/heptane. 8 mL diethyl ether saturated with HCl was added to 0.157 g [2-(5-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-carbamic acid tert-butyl ester (0.42 mmol) in 8 mL methanol and stirred 16 hours. The reaction was neutralized with 2N NaOH and extracted with ethyl acetate. The organic phase was washed with brine, dried with MgSO4 and concentrated in vacuo to give 0.112 g 2-(5-fluoro-1H-indol-3-ylsulfanyl)-benzylamine (98%).
The following compound was prepared in a similar way and analytical data are shown in Table 1:

    133. 2-(6-Fluoro-1H-indol-3-ylsulfanyl)-benzylamine


Example 8
Compounds of Formula I
Synthesis of


    [2-(1H-Indol-5-ylsulfanyl)-benzyl]-methyl-amine


(2-Mercapto-benzyl)-methyl-carbamic acid tert-butyl ester (1.85 g, 7.30 mmol) in dry toluene (15 mL) is placed in an Emrys Optimizer EXP 20 mL tube. Tris(dibenzylideneacetone) dipalladium (334 mg, 0.37 mmol), bis(2-diphenylphosphinophenyl)ether (197 mg, 0.37 mmol), tert-butyl-5-bromoindole-1-carboxylate (2.38 g, 8.03 mmol) and potassium tert-butoxide (860 mg, 7.67 mmol) are added. The reaction vessel is sealed and subjected to microwave heating at 160° C. for 15 minutes. Upon cooling the mixture is poured onto a plug of silica and the product is eluted with ethyl acetate-heptane (1:4). 0.67 g (20%) of 5-{2-[(tert-butoxycarbonyl-methyl-amino)-methyl]-phenylsulfanyl}-indole-1-carboxylic acid tert-butyl ester is isolated and used in the next step whithout further purification. 5-{2-[(tert-butoxycarbonyl-methyl-amino)-methyl]-phenylsulfanyl}-indole-1-carboxylic acid tert-butyl ester (0.67 g, 1.43 mmol) in methanol (15 mL) and diethyl ether saturated with hydrochloric acid (15 mL) is stirred at room temperature for 1 hour and concentrated in vacuo. Ice/water is added to the remanence and 28% aqueous NaOH is added until pH 9. The aqueous fraction is extracted with ethyl acetate (3×15 mL). Combined organic fractions are dried with MgSO4 and concentrated in vacuo. The product is purified by silica gel chromatography eluting with ethyl acetate-triethyl amine (100:4) followed by ethyl acetate-ethanol-triethyl amine (100:5:5). Upon evaporation of the volatiles, 40 mg (10%) of [2-(1H-indol-5-ylsulfanyl)-benzyl]-methyl-amine is isolated.
The following compounds are prepared in a similar way:

    [2-(1H-lndol-4-ylsulfanyl)-benzyl]-methyl-amine
    [2-(1H-Indol-6-ylsulfanyl)-benzyl]-methyl-amine
    [2-(1H-Indol-7-ylsulfanyl)-benzyl]-methyl-amine









TABLE 1







Measured molecular mass, measured HPLC-retention time


(Rt, min) and UV- and ELSD-purities (%).













UV-purity
ELSD-



compound
Rt (min.)
(%)
purity (%)
M + H+














1
1.79
97.9
100
283.2


2
1.75
80.6
96.5
307.9


3
1.83
98.0
97.1
300.8


4
1.91
95.4
98.2
317.1


5
1.83
98.8
99.3
301.1


6
2.04
99.4
99.1
317.1


7
2.00
97.9
97.4
297.2


8
1.91
96.8
98.3
313.1


9
1.79
98.9
100
313.2


10
1.91
99.5
100
301.1


11
2.08
96.1
100
316.8


12
1.87
95.2
99.1
297


13
1.82
98.7
100.0
297.2


14
1.56
95.2
100.0
308


15
1.88
98.3
100.0
297.1


16
1.81
99.2
100.0
297.1


17
1.49
75.0
91.5
299


18
1.68
90.0
95.0
308


19
1.96
90.5
95.6
316.8


20
1.77
88.7
96.0
313.1


21
1.75
87.3
96.9
313


22
1.79
98.5
97.5
269


23
1.95
100
95.4
287


24
1.94
99.2
95.8
286.8


25
1.93
97.2
97.0
283.3


26
1.90
98.2
96.3
303


27
1.87
97.4
96.8
283.1


28
2.01
97.0
99.1
301.1


29
1.85
98.0
99.9
283


30
1.89
98.1
99.8
283


31
1.72
97.9
99.7
286.9


32
2.02
97.9
100
297.1


33
1.72
99.5
99.9
299.1


34
1.92
97.7
100
303.1


35
1.97
96.5
99.9
303.1


36
1.81
98.8
99.8
313.2


37
1.51
97.7
99.6
329.1


38
2.00
97.5
99.8
346.9


39
1.87
80.6
99.0
283.1


40
1.73
84.1
97.9
329.1


41
1.68
87.5
98.5
299.1


42
1.66
87.6
99.4
299


43
1.98
93.7
98.7
348.8


44
1.78
93.7
99.3
299.1


45
2.45
84.3
85.4
303.3


46
2.05
96.8
100
337.1


47
1.30
93.4
100
285.1


48
1.83
92.4
100
348.8


49
1.92
90.6
99.9
303


50
2.00
88.6
99.6
395.1


51
1.62
86.1
98.5
293.8


52
1.82
97.0
99.7
283.3


53
2.04
95.9
99.7
283.4


54
1.56
73.92
98.05
347.0


55
2.10
74.19
96.08
299.1


56
1.76
78.09
100.00
304.9


57
1.88
80.25
99.77
320.8


58
1.97
80.83
98.86
320.9


59
2.12
84.31
99.11
355.1


60
1.83
86.68
99.15
317.1


61
1.90
87.33
99.75
367.0


62
1.64
88.10
99.61
317.0


63
1.41
88.77
99.74
303.1


64
1.83
91.91
100.00
304.8


65
1.74
92.27
100.00
317.1


66
2.00
93.20
99.91
321.1


67
1.97
93.68
100.00
320.9


68
1.92
93.80
99.97
301.0


69
1.85
94.35
100.00
329.1


70
2.00
94.52
99.86
367.0


71
1.73
95.29
99.88
317.1


72
2.04
95.56
99.80
367.0


73
1.85
95.67
100.00
305.0


74
1.76
96.68
99.95
317.1


75
1.82
97.23
100.00
301.1


76
1.91
97.71
100.00
301.1


77
1.89
97.73
99.96
301.1


78
1.93
97.79
99.95
301.1


79
1.96
98.85
99.95
301.0


80
1.88
99.01
99.86
319.0


81
1.94
86.65
99.91
320.9


82
1.85
72.56
100.00
332.8


83
2.03
94.94
99.91
317.1


84
2.05
92.54
99.90
317.1


85
1.85
86.79
99.70
332.9


86
1.95
82.70
99.69
333.0


87
1.97
85.03
99.85
320.9


88
1.99
88.12
100.00
335.0


89
1.95
99.44
100.00
315.1


90
1.97
98.16
100.00
297.2


91
2.12
95.13
99.74
311.3


92
1.83
93.40
100.00
313.1


93
1.78
92.78
98.90
297.0


94
1.79
92.77
100.00
313.1


95
2.11
90.80
100.00
363.0


96
1.94
89.78
99.94
301.1


97
1.84
87.54
100.00
301.0


98
1.49
87.12
99.49
299.1


99
1.51
86.97
100.00
318.9


100
2.07
85.51
98.57
317.1


101
2.04
81.67
94.01
317.0


102
2.00
82.20
80.30
341.1


103
1.86
90.90
82.40
342.9


104
1.95
90.40
78.70
327.1


105
2.06
92.49
99.44
317.1


106
1.96
87.25
98.90
317.0


107
2.03
90.96
99.55
316.8


108
2.04
91.97
99.87
316.8


109
2.02
83.80
98.60
317.1


110
1.96
90.04
99.61
320.9


111
1.99
97.66
99.69
321.0


112
1.89
88.36
99.15
320.9


113
1.98
90.52
99.39
320.9


114
2.18
87.86
99.70
331.0


115
1.97
87.81
99.17
347.0


116
1.88
89.22
99.38
333.0


117
1.89
95.36
99.65
332.9


118
1.96
82.34
98.84
332.7


119
1.87
90.44
99.82
333.0


120
2.08
89.98
99.57
337.2


121
2.13
87.91
99.27
337.1


122
2.00
84.01
98.48
337.2


123
2.11
80.98
99.08
337.1


124
1.91
91.92
99.81
303.1


125
2.08
84.95
98.14
316.7


126
2.25
70.89
87.20
317.1


127
2.01
83.89
98.73
335.1


128
1.74
88.20
98.40
273.0


129
1.77
93.93
99.83
317.1


130
1.78
95.85
99.64
305.0


131
1.80
97.04
99.88
305.0


132
1.42
80.84
97.76
285.1


133
1.78
97.33
99.29
273.0


134
1.84
97.99
99.48
305.0


135
1.38
92.53
98.73
303.1


136
1.86
93.25
97.20
317.0









Example 9
Transporter Binding Assay
Measurements of [3H]-5-HT Uptake into Rat Cortical Synaptosomes
Whole brains from male Wistar rats (125-225 g), excluding cerebellum, are homogenized in 0.32 M sucrose supplemented with 1 mM nialamid with a glass/teflon homogenizer. The homogenate is centrifuged at 600×g for 10 min at 4° C. The pellet is discarded and the supernatant is centrifuged at 20.000×g for 55 min. The final pellet is homogenized (20 sec) in this assay buffer (0.5 mg original tissue/well). Test compounds (or buffer) and 10 nM [3H]-5-HT are added to 96 well plates and shaken briefly. Composition of assay buffer: 123 mM NaCl, 4.82 mM KCl, 0.973 mM CaCl2, 1.12 mM MgSO4, 12.66 mM Na2HPO4, 2.97 mM NaH2PO4, 0.162 mM EDTA, 10 mM glucose and 1 mM ascorbic acid. Buffer is oxygenated with 95% 02/5% C02 for 10 min at 37° C. and pH is adjusted 7.4. The incubation is started by adding tissue to a final assay volume of 0.2 mL. After 15 min incubation with radioligand at 37° C., samples are filtered directly on Unifilter GF/C glass fiber filters (soaked for 1 hour in 0.1% polyethylenimine) under vacuum and immediately washed with 3×0.2 ml assay buffer. Non-specific uptake is determined using citalopram (10 μM final concentration). Citalopram is included as reference in all experiments as dose-response curve.
Measurements of [3H]Noradrenaline Uptake into Rat Cortical Synaptosomes
Fresh cortex from male Wistar rats (125-225 g) are homogenized in 0.4M sucrose with a glass/teflon homogenizer. The homogenate is centrifuged at 600×g for 10 min at 4° C. The pellet is discarded and the supernatant is centrifuged at 20.000×g for 55 min. The final pellet is homogenized (20 sec) in this assay buffer (6 mg original tissue/mL=4 mg/well). Test compounds (or buffer) and 10 nM [3H]-noradrenaline are added to deep 96 well plates and shaken briefly. Composition of assay buffer: 123 mM NaCl, 4.82 mM KCl 0.973 mM CaCl2, 1.12 mM MgSO4, 12.66 mM Na2HPO4, 2.97 mM NaH2PO4, 0.162 mM EDTA, 10 mM glucose and 1 mM ascorbic acid. Buffer is oxygenated with 95% 02/5% C02 for 10 min at 37° C. and pH is adjusted 7.4. The incubation is started by adding tissue to a final assay volume of 1 ml. After 15 min incubation with radioligand at 37° C., samples are filtered directly on Unifilter GF/C glass fiber filters (soaked for 1 hour in 0.1% polyethylenimine) under vacuum and immediately washed with 3×1 mL assay buffer. Non-specific uptake is determined using talsupram (10 μM final concentration). Duloxetine is included as reference in all experiments as dose-response curve.
Results of the experiments showed that the tested compounds of the invention inhibit the serotonin and norepinephrine reuptake with IC50 below 200 nM.
Measurements of [3H]Dopamine Uptake into Rat Synaptosomes
Tissue preparation: male wistar rats (125-250 g) are sacrificed by decapitated and striatum quickly dissected out and placed in 40 vol (w/v) ice cold 0.40 M sucrose. The tissue is gently homogenised (glass teflon homogeniser) and the P2 fraction is obtained by centrifugation (1000 g, 10 minutes and 40000 g, 20 minutes, 4° C.) and suspended in 560 volumes of a modified Krebs-Ringer-phosphate buffer, pH 7.4. Tissue 0,25 mg/well(140 μl) (original tissue) is mixed with test suspension. After 5 minutes pre-incubation 12.5 nM 3H-dopamine is added and the mixture is incubated for 5 minutes at RT.
The incubation is terminated by filtering the samples under vacuum through Whatman GF/C filters with a wash of 1 ml buffer. The filters are dried and appropriate scintillation fluid (Optiphase Supermix) is added. After storage for 2 hours in the dark the content of radioactivity is determined by liquid scintillation counting. Uptake is obtained by subtracting the non-specific binding and passive transport measured in the presence of 100 μM of benztropin. For determination of the inhibition of uptake ten concentrations of drugs covering 6 decades are used.
3H-DA=3,4-(ring-2,5,6-3H)dopamine hydrochloride from New England Nuclear, specific activity 30-50 Ci/mmol.
Hyttel, Biochem. Pharmacol. 1978, 27, 1063-1068;
Hyttel, Prog. Neuro-Psychopharmacol. & bil. Psychiat. 1982, 6 277-295;
Hyttel & Larsen, Acta Pharmacol. Tox. 1985, 56, suppl. 1, 146-153.

## Claims

1. A compound of the general formula I:




wherein the sulphur atom is attached to the indole via any ring carbon of the indole and wherein:
R1-R2 are independently selected from hydrogen, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl, and C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl;
R3-R7 and R9-R12 are independently selected from hydrogen, halogen, cyano, nitro, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl, C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl, amino, C1-6-alk(en/yn)ylamino, di-(C1-6-alk(en/yn)yl)amino, C1-6-alk(en/yn)ylcarbonyl, aminocarbonyl, C1-6-alk(en/yn)ylaminocarbonyl, di-(C1-6-alk(en/yn)yl)aminocarbonyl, hydroxy, C1-6-alk(en/yn)yloxy, C1-6-alk(en/yn)ylthio, halo-C1-6-alk(en/yn)yl, halo-C1-6-alk(en/yn)ylsulfonyl, halo-C1-6-alk(en/yn)ylsulfanyl and C1-6-alk(en/yn)ylsulfonyl;
R8 is selected from hydrogen, cyano, nitro, C1-6-alk(en/yn)yl, C3-8-cycloalk(en)yl, C3-8-cycloalk(en)yl-C1-6-alk(en/yn)yl, amino, C1-6-alk(en/yn)ylamino, di-(C1-6-alk(en/yn)yl)amino, C1-6alk(en/yn)ylcarbonyl, aminocarbonyl, C1-6-alk(en/yn)ylaminocarbonyl, di-(C1-6- alk(en/yn)yl)aminocarbonyl, hydroxy, C1-6-alk(en/yn)yloxy, C1-6alk(en/yn)ylthio, halo-C 1-6-alk(en/yn)yl, halo-C1-6-alk(en/yn)ylsulfonyl, halo-C1-6-alk(en/yn)ylsulfanyl and C1-6-alk(en/yn)ylsulfonyl; and
R13 is selected from hydrogen or C1-6-alk(en/yn)yl;

or a pharmaceutically acceptable salt thereof;
with the provisos that:
when the sulphur atom is attached via atom nr. 2 of the indole then R7 does not exist;
when the sulphur atom is attached via atom nr. 3 of the indole then R12 does not exist;
when the sulphur atom is attached via atom nr. 4 of the indole then R8 does not exist;
when the sulphur atom is attached via atom nr. 5 of the indole then R9 does not exist;
when the sulphur atom is attached via atom nr. 6 of the indole then R10 does not exist; and
when the sulphur atom is attached via atom nr. 7 of the indole then R11 does not exist.

2. The compound according to claim 1 wherein R1 and R2 are independently selected from hydrogen and C1-6-alk(en/yn)yl.

3. The compound according to claim 1, wherein R3-R7 and R9-R12 are independently selected from the group consisting of hydrogen, halogen, cyano, C1-6-alk(en/yn)yl, hydroxy, C1-6-alk(en/yn)yloxy and halo-C1-6-alk(en/yn)yl.

4. The compound according to claim 1, wherein R3-R6 are independently selected from the group consisting of hydrogen, halogen and C1-6-alk(en/yn)yl.

5. The compound according to claim 1, wherein R7 and R9-R12 are independently selected from the group consisting of hydrogen, halogen, cyano, C1-6-alk(en/yn)yl, hydroxy, C1-6-alk(en/yn)yloxy and halo-C1-6-alk(en/yn)yl.

6. A pharmaceutical composition comprising a compound according to claim 1 and at least one pharmaceutically acceptable carrier or diluent.

7. A compound selected from the group consisting of:
[2-(1H-Indol-3-ylsulfanyl)benzyl]dimethyl amine;
[2-(5-cyano-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine;
[2-(5-Fluoro-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine;
[2-(5-Chloro-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine;
Dimethyl-[2-(7-methyl-1H-indol-3-ylsulfanyl)benzyl]amine;
[2-(7-Methoxy-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine;
[2-(5-Methoxy-1H-indol-3′-ylsulfanyl)benzyl]dimethyl amine;
[2-(6-Fluoro-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine;
[2-(6-Chloro-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine;
Dimethyl-[2-(2-methyl-1H-indol-3-ylsulfanyl)benzyl]amine;
Dimethyl-[2-(6-methyl-1H-indol-3-ylsulfanyl)benzyl]amine;
[2-(4-cyano-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine;
Dimethyl-[2-(1-methyl-1H-indol-3-ylsulfanyl)benzyl]amine;
Dimethyl-[2-(4-methyl-1H-indol-3-ylsulfanyl)benzyl]amine;
Dimethyl-[2-(4-hydroxy-1H-indol-3-ylsulfanyl)benzyl]amine;
[2-(6-cyano-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine;
[2-(7-Chloro-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine;
[2-(6-Methoxy-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine;
[2-(4-Methoxy-1H-indol-3-ylsulfanyl)benzyl]dimethyl amine;
[2-(1H-Indol-3-ylsulfanyl)benzyl]methylamine;
[2-(6-Fluoro-1H-indol-3-ylsulfanyl)benzyl]methyl amine;
[2-(5-Fluoro-1H-indol-3-ylsulfanyl)benzyl]methyl amine;
Methyl-[2-(4-methyl-1H-indol-3-ylsulfanyl)benzyl]amine
Methyl-[2-(2-methyl-1H-indol-3-ylsulfanyl)benzyl]amine;
[2-(5-Fluoro-2-methyl-1H-indol-3-ylsulfanyl)-benzyl]methyl amine;
Methyl-[2-(5-methyl-1H-indol-3-ylsulfanyl)benzyl]amine;
Methyl-[2-(7-methyl-1H-indol-3-ylsulfanyl)benzyl]amine;
[2-(7-Ethyl-1H-indol-3-ylsulfanyl)benzyl]methyl amine;
[2-(6-Methoxy-1H-indol-3′-ylsulfanyl)benzyl]methyl amine;
[2-(5-Chloro-1H-indol-3-ylsulfanyl)benzyl]methyl amine;
[2-(6-Chloro-1H-indol-3-ylsulfanyl)benzyl]methyl amine;
[2-(5-Methoxy-4-methyl-1H-indol-3-ylsulfanyl)-benzyl]methyl amine;
[2-(5,6-Dimethoxy-1H-indol-3-ylsulfanyl)-benzyl]methyl amine;
[2-(6-Bromo-1H-indol-3-ylsulfanyl)-benzyl]methyl amine;
Methyl-[2-(6-methyl-1H-indol-3-ylsulfanyl)-benzyl]amine;
[2-(4,7-Dimethoxy-1H-indol-3-ylsulfanyl)-benzyl]methyl amine;
[2-(5-Methoxy-1H-indol-3-ylsulfanyl)benzyl]methyl amine;
[2-(4-Methoxy-1H-indol-3-ylsulfanyl)benzyl]methyl amine;
[2-(5-Bromo-1H-indol-3-ylsulfanyl)-benzyl]methyl amine;
[2-(7-Methoxy-1H-indol-3-ylsulfanyl)benzyl]methyl amine;
[5-Chloro-2-(1H-indol-3-ylsulfanyl)-benzyl]methyl amine;
Methyl-[2-(6-trifluoromethyl-1H-indol-3-ylsulfanyl)-benzyl]amine;
[5-Hydroxy-2-(1H-indol-3-ylsulfanyl)-benzyl]methyl amine;
[2-(4-Bromo-1H-indol-3-ylsulfanyl)-benzyl]methyl amine;
-[2-(7-Chloro-1H-indol-3-ylsulfanyl)-benzyl]methyl amine;
[2-(5-Iodo-1H-indol-3-ylsulfanyl)-benzyl]methyl amine;
[2-(6-Cyano-1H-indol-3-ylsulfanyl)-benzyl]methyl amine;
[2-(1H-lndol-3-ylsulfanyl)-5-methyl-benzyl]methyl amine;
[2-(3-methyl-1H-indol-2-ylsulfanyl)-benzyl]methyl amine;
[2-(5,6-Dimethoxy-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine;
[5-Fluoro-2-(3-methyl-1H-indol-2-ylsulfanyl)-benzyl]-methyl-amine;
[2-(7-Chloro-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine;
[5-Fluoro-2-(6-trifluoromethyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[5-Fluoro-2-(7-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
3-(4-Fluoro-2-methylaminomethyl-phenylsulfanyl)-2-methyl-1H-indol-4-ol;
3-(4-Fluoro-2-methylaminomethyl-phenylsulfanyl)-1H-indol-6-ol;
[5-Fluoro-2-(5-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[5-Fluoro-2-(4-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[2-(6-Chloro-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine;
[2-(5-Chloro-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine;
[5-Fluoro-2-(6-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[5-Fluoro-2-(5-methoxy-4-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[2-(5-Bromo-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine;
[5-Fluoro-2-(5-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[2-(6-Bromo-1H-indol-3-ylsulfanyl)-5-fluoro-benzyl]-methyl-amine;
[5-Fluoro-2-(6-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[5-Fluoro-2-(6-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[5-Fluoro-2-(2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[5-Fluoro-2-(5-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[5-Fluoro-2-(4-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[5-Fluoro-2-(7-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[5-Fluoro-2-(1-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[5-Fluoro-2-(5-fluoro-2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[5-Chloro-2-(5-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[5-Chloro-2-(5-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[5-Chloro-2-(7-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[5-Chloro-2-(1-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[5-Chloro-2-(4-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[5-Chloro-2-(7-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[5-Chloro-2-(6-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[5-Chloro-2-(5-fluoro-2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[2-(5-Fluoro-2-methyl-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine;
Methyl-[5-methyl-2-(4-methyl-1H-indol-3-ylsulfanyl)-benzyl]-amine;
[2-(7-Ethyl-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine;
[2-(6-Methoxy-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine;
Methyl-[5-methyl-2-(2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-amine;
[2-(4-Methoxy-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine;
[2-(6-Bromo-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine;
[2-(6-Fluoro-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine;
[2-(4-Fluoro-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine;
3-(4-Methyl-2-methylaminomethyl-phenylsulfanyl)-1H-indol-6-ol;
[5-Chloro-2-(5-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[2-(6-Chloro-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine;
[2-(5-Chloro-1H-indol-3-ylsulfanyl)-5-methyl-benzyl]-methyl-amine;
[4-Chloro-2-(6-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(5-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(7-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(4-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(5-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(6-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(4-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(7-fluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(7-ethyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(5-methoxy-4-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(5-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(6-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(7-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(4-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(5-chloro-1-H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(6-chloro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(7-chloro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(1-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(3-methyl-1H-indol-2-ylsulfanyl)-benzyl]-methyl-amine;
[4-Chloro-2-(5-fluoro-2-methyl-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
2-(5-Fluoro-1H-indol-3-ylsulfanyl)-benzylamine;
[2-(5-Fluoro-4-methoxy-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
3-(2-Methylaminomethyl-phenylsulfanyl)-1H-indol-4-ol;
2-(6-Fluoro-1H-indol-3-ylsulfanyl)-benzyl amine;
[2-(5,6-Difluoro-1H-indol-3-ylsulfanyl)-benzyl]-methyl-amine;
6-Fluoro-3-(2-methylaminomethyl-phenylsulfanyl)-1H-indol-5-ol;
[2-(1H-Indol-5-ylsulfanyl)-benzyl]-methyl-amine;
[2-(1H-Indol-4-ylsulfanyl)-benzyl]-methyl-amine;
[2-(1H-Indol-6-ylsulfanyl)-benzyl]-methyl-amine; and
[2-(1H-Indol-7-ylsulfanyl)-benzyl]-methyl-amine;

or a pharmaceutically acceptable salt thereof.

8. The compound according to claim 1, wherein R8 is independently selected from the group consisting of hydrogen, cyano, C1-6- alk(en/yn)yl, hydroxy, C1-6-alk(en/yn)yloxy and halo-C1-6-alk(en/yn)yl.

9. A compound that is [2-(5-Fluoro-1H-indol-3- ylsulfanyl)benzyl]dimethyl amine or a pharmaceutically acceptable salt thereof.

10. A compound that is [2-(6-Fluoro-1H-indol-3- ylsulfanyl)benzyl]dimethyl amine or a pharmaceutically acceptable salt thereof.

11. A compound that is [2-(4-Methoxy-1H-indol-3- ylsulfanyl)benzyl]dimethyl amine or a pharmaceutically acceptable salt thereof.

12. A compound that is [2-(6-Fluoro-1H-indol-3- ylsulfanyl)benzyl]methyl amine or a pharmaceutically acceptable salt thereof.

13. A compound that is [2-(5-Fluoro-1H-indol-3- ylsulfanyl)benzyl]methyl amine or a pharmaceutically acceptable salt thereof.

14. A compound that is [2-(5-Fluoro-2-methyl-1H- indol-3-ylsulfanyl)-benzyl]methyl amine or a pharmaceutically acceptable salt thereof.

15. A compound that is [5-Chloro-2-(6-fluoro-1H- indol-3-ylsulfanyl)-benzyl]-methyl-amine or a pharmaceutically acceptable salt thereof.