# Patent

## Title
Therapeutic amides

## Abstract

Compounds of the formula




are disclosed herein. Therapeutic methods, compositions, and medicaments related thereto are also disclosed.

## Background
RELATED APPLICATIONS
This application claims the benefit of U.S. Provisional Application No. 60/824,631, filed on Sep. 6, 2006, which is hereby incorporated by reference in its entirety.


DESCRIPTION OF THE INVENTION
Ocular hypotensive agents are useful in the treatment of a number of various ocular hypertensive conditions, such as post-surgical and post-laser trabeculectomy ocular hypertensive episodes, glaucoma, and as presurgical adjuncts.
Glaucoma is a disease of the eye characterized by increased intraocular pressure. On the basis of its etiology, glaucoma has been classified as primary or secondary. For example, primary glaucoma in adults (congenital glaucoma) may be either open-angle or acute or chronic angle-closure. Secondary glaucoma results from pre-existing ocular diseases such as uveitis, intraocular tumor or an enlarged cataract.
The underlying causes of primary glaucoma are not yet known. The increased intraocular tension is due to the obstruction of aqueous humor outflow. In chronic open-angle glaucoma, the anterior chamber and its anatomic structures appear normal, but drainage of the aqueous humor is impeded. In acute or chronic angle-closure glaucoma, the anterior chamber is shallow, the filtration angle is narrowed, and the iris may obstruct the trabecular meshwork at the entrance of the canal of Schlemm. Dilation of the pupil may push the root of the iris forward against the angle, and may produce pupilary block and thus precipitate an acute attack. Eyes with narrow anterior chamber angles are predisposed to acute angle-closure glaucoma attacks of various degrees of severity.
Secondary glaucoma is caused by any interference with the flow of aqueous humor from the posterior chamber into the anterior chamber and subsequently, into the canal of Schlemm. Inflammatory disease of the anterior segment may prevent aqueous escape by causing complete posterior synechia in iris bombe, and may plug the drainage channel with exudates. Other common causes are intraocular tumors, enlarged cataracts, central retinal vein occlusion, trauma to the eye, operative procedures and intraocular hemorrhage.
Considering all types together, glaucoma occurs in about 2% of all persons over the age of 40 and may be asymptotic for years before progressing to rapid loss of vision. In cases where surgery is not indicated, topical β-adrenoreceptor antagonists have traditionally been the drugs of choice for treating glaucoma.
Certain eicosanoids and their derivatives are currently commercially available for use in glaucoma management. Eicosanoids and derivatives include numerous biologically important compounds such as prostaglandins and their derivatives. Prostaglandins can be described as derivatives of prostanoic acid which have the following structural formula:




Various types of prostaglandins are known, depending on the structure and substituents carried on the alicyclic ring of the prostanoic acid skeleton. Further classification is based on the number of unsaturated bonds in the side chain indicated by numerical subscripts after the generic type of prostaglandin [e.g. prostaglandin E1 (PGE1), prostaglandin E2 (PGE2)], and on the configuration of the substituents on the alicyclic ring indicated by α or β [e.g. prostaglandin F2α (PGF2β)].
Disclosed herein is a compound having a structure




or a pharmaceutically acceptable salt thereof, or a prodrug thereof;

wherein Y is an organic acid functional group, or an amide or ester thereof comprising up to 14 carbon atoms; or Y is hydroxymethyl or an ether thereof comprising up to 14 carbon atoms; or Y is a tetrazolyl functional group;

A is —(CH2)6—, cis —CH2CH═CH—(CH2)3—, or —CH2C≡C—(CH2)3—, wherein 1 or 2 carbon atoms may be replaced by S or O; or A is —(CH2)m—Ar—(CH2)o— wherein Ar is interarylene or heterointerarylene, the sum of m and o is 1, 2, 3, or 4, and wherein 1 —CH2— may be replaced by S or O, and 1 —CH2—CH2— may be replaced by —CH═CH— or —C≡C—;

E is SO2 or CO;

G is alkyl, aryl or heteroaryl having 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 carbon atoms; and

B is substituted aryl or substituted heteroaryl.

In one embodiment said compound is not




wherein R10 is H, CH3, or CH2CH3; and

R11 is H, CH3, OCH3, Br, Cl, or NO2.

In another embodiment, if A is




then B is hydroxyalkylaryl.

Also disclosed herein is a carboxylic acid or a bioisostere thereof, said carboxylic acid having a structure




or a pharmaceutically acceptable salt thereof, or a prodrug thereof;

wherein A is —(CH2)6—, cis —CH2CH═CH—(CH2)3—, or —CH2C≡C—(CH2)3—, wherein 1 or 2 carbon atoms may be replaced by S or O; or A is —(CH2)m—Ar—(CH2)o— wherein Ar is interarylene or heterointerarylene, the sum of m and o is 1, 2, 3, or 4, and wherein 1 —CH2— may be replaced by S or O, and 1 —CH2—CH2— may be replaced by —CH═CH— or —C≡C—;

E is SO2 or CO;

G is alkyl, aryl or heteroaryl having 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 carbon atoms; and

B is substituted aryl or substituted heteroaryl.

“Bioisosteres are substituents or groups that have chemical or physical similarities, and which produce broadly similar biological properties.” Silverman, Richard B., The Organic Chemistry of Drug Design and Drug Action, 2nd Edition, Amsterdam: Elsevier Academic Press, 2004, p. 29.
While not intending to be limiting, organic acid functional groups are bioisoteres of carboxylic acids. An organic acid functional group is an acidic functional group on an organic molecule. While not intending to be limiting, organic acid functional groups may comprise an oxide of carbon, sulfur, or phosphorous. Thus, while not intending to limit the scope of the invention in any way, in certain compounds Y is a carboxylic acid, sulfonic acid, or phosphonic acid functional group.
Additionally, an amide or ester of one of the organic acids shown above comprising up to 14 carbon atoms is also contemplated. In an ester, a hydrocarbyl moiety replaces a hydrogen atom of an acid such as in a carboxylic acid ester, e.g. CO2Me, CO2Et, etc.
In an amide, an amine group replaces an OH of the acid. Examples of amides include CON(R2)2, CON(OR2)R2, CON(CH2CH2OH)2, and CONH(CH2CH2OH) where R2 is independently H, C1-C6 alkyl, phenyl, or biphenyl. Moieties such as CONHSO2R2 are also amides of the carboxylic acid notwithstanding the fact that they may also be considered to be amides of the sulfonic acid R2—SO3H. The following amides are also specifically contemplated, CONSO2-biphenyl, CONSO2-phenyl, CONSO2-heteroaryl, and CONSO2-naphthyl. The biphenyl, phenyl, heteroaryl, or naphthyl may be substituted or unsubstituted.
Han et. al. (Biorganic & Medicinal Chemistry Letters 15 (2005) 3487-3490) has recently shown that the groups shown below are suitable bioisosteres for a carboxylic acid. The activity of compounds with these groups in inhibiting HCV NS3 protease was comparable to or superior to similar compounds where the group is replaced by CO2H. Thus, Y could be any group depicted below.
Carboxylic Acid Bioisosteres According to Han et. al.







While not intending to limit the scope of the invention in any way, Y may also be hydroxymethyl or an ether thereof comprising up to 14 carbon atoms. An ether is a functional group wherein a hydrogen of an hydroxyl is replaced by carbon, e.g., Y is CH2OCH3, CH2OCH2CH3, etc. These groups are also bioisosteres of a carboxylic acid.
“Up to 14 carbon atoms” means that the entire Y moiety, including the carbonyl carbon of a carboxylic acid ester or amide, and both carbon atoms in the —CH2O—C of an ether has 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, or 14 carbon atoms.
Finally, while not intending to limit the scope of the invention in any way, Y may be a tetrazolyl functional group.
While not intending to be limiting, examples of compounds having the identified Y are depicted below. In these examples R is H or hydrocarbyl, subject to the constraints defined herein. Each structure below represents a specific embodiment which is individually contemplated, as well as pharmaceutically acceptable salts and prodrugs of compounds which are represented by the structures. However, other examples are possible which may not fall within the scope of the structures shown below.
















 









Organic Acids
Esters
Amides



















 


Carboxylic Acid
Carboxylic Acid Ester
Carboxylic Acid Amide


 
















 


Phosponic Acid
Phosphonic Acid Ester
Phosphonic Acid Amide


 
















 


Sulfonic Acid
Sulfonic Acid Ester
Sulfonic Acid Amide


 












 


Y is hydroxymethyl
Ether









A tetrazolyl functional group is another bioisostere of a carboxylic acid. An unsubstituted tetrazolyl functional group has two tautomeric forms, which can rapidly interconvert in aqueous or biological media, and are thus equivalent to one another. These tautomers are shown below.




Additionally, if R2 is C1-C6 alkyl, phenyl, or biphenyl, other isomeric forms of the tetrazolyl functional group such as the one shown below are also possible, unsubstituted and hydrocarbyl substituted tetrazolyl up to C12 are considered to be within the scope of the term “tetrazolyl.”





While not intending to limit the scope of the invention in any way, in one embodiment, Y is CO2R2, CON(R2)2, CON(OR2)R2, CON(CH2CH2OH)2, CONH(CH2CH2OH), CH2OH, P(O)(OH)2, CONHSO2R2, SO2N(R2)2, SO2NHR2,




wherein R2 is independently H, C1-C6 alkyl, unsubstituted phenyl, or unsubstituted biphenyl.

According to Silverman (p. 30), the moieties shown below are also bioisosteres of a carboxylic acid.
Carboxylic Acid Bioisosteres According to Silverman




Orlek et al. (J. Med. Chem. 1991, 34, 2726-2735) described oxadiazoles as suitable bioisosteres for a carboxylic acid. These ester replacements were shown to be potent muscarinic agonists having improved metabolic stability. Oxadiazoles were also described by Anderson et al. (Eur. J. Med. Chem. 1996, 31, 417-425) as carboxamide replacements having improved in vivo efficacy at the benzodiazepine receptor.
Carboxylic Acid Bioisosteres According to Orlek et. al.




Kohara et al. (J. Med. Chem. 1996, 39, 5228-5235) described acidic heterocycles as suitable bioisosteres for a tetrazole. These carboxylic acid replacements were shown to be potent angiotensin 11 receptor antagonists having improved metabolic stability.
Tetrazole Bioisosteres According to Kohara et. al.




Drysdale et al. (J. Med. Chem. 1992, 35, 2573-2581) have described carboxylic acid mimics of non-peptide CCK-B receptor antagonists. The binding affinities of many of the bioisosteres are similar to the parent carboxylic acid.
Carboxylic Acid Bioisosteres According to Drysdale et. al.




A is —(CH2)6—, cis —CH2CH═CH—(CH2)3—, or —CH2C≡C—(CH2)3—, wherein 1 or 2 carbon atoms may be replaced by S or O; or A is —(CH2)m—Ar—(CH2)o— wherein Ar is interarylene or heterointerarylene, the sum of m and o is 1, 2, 3, or 4, and wherein 1 —CH2— may be replaced by S or O, and 1 —CH2—CH2— may be replaced by —CH═CH— or —C≡C—.
Thus, A may be —(CH2)6—, cis —CH2CH═CH—(CH2)3—, or —CH2C≡C—(CH2)3—.
Alternatively, A may be a group which is related to one of these three moieties in that any carbon is replaced with S or O. For example, A may be a moiety where S replaces one or two carbon atoms such as one of the following or the like.







Alternatively, A may be a moiety where O replaces one or two carbon atoms such as one of the following or the like.




Alternatively, A may have an O replacing one carbon atom and an S replacing another carbon atom, such as one of the following or the like.




Alternatively, in certain embodiments A is —(CH2)m—Ar—(CH2)o— wherein Ar is interarylene or heterointerarylene, the sum of m and o is 1, 2, 3, or 4, and wherein 1 —CH2— may be replaced by S or O, and 1 —CH2—CH2— may be replaced by —CH═CH— or —C≡C—. In other words,
in one embodiment A comprises:


    
    
        1) a) 1, 2, 3, or 4 —CH2— moieties, or
        
            b) 0, 1 or 2 —CH2— moieties and —CH═CH— or —C≡C—; and
        
        
        2) Ar;
        e.g. —CH2—Ar—, —(CH2)2—Ar—, —CH═CH—Ar—, —C≡C—Ar—, —CH2—Ar—CH2—, —CH2Ar—(CH2)2—, —CH2Ar—CH═CH—, —CH2Ar—C≡C—, —(CH2)2—Ar—(CH2)2—, and the like;

in another embodiment A comprises:

        1) a) O; and 0, 1, 2, or 3 —CH2— moieties; or
        
            b) O; and 0 or 1 —CH2— moieties and —CH═CH— or —C≡C—; and
        
        
        2) Ar;
        e.g., —O—Ar—, —Ar—CH2—O—, —O—Ar—(CH2)2—, —OAr—CH═CH—, —O—Ar—C≡C—, —O—CH2—Ar—, —O—CH2—Ar—(CH2)2, —O—CH2Ar—CH═CH—, —O—CH2Ar—C≡C—, and the like; or

in another embodiment A comprises:

        1) a) S; and 0, 1, 2, or 3 —CH2— moieties; or
        
            b) S; and 0 or 1 —CH2— moieties and —CH═CH— or —C≡C—; and
        
        
        2) Ar;
        e.g., —S—Ar—, —Ar—CH2—S—, —S—Ar—(CH2)2—, —SAr—CH═CH—, —S—Ar—C≡C—, —S—CH2—Ar—, —S—CH2—Ar—(CH2)2, —S—CH2Ar—CH═CH—, —S—CH2Ar—C≡C—, and the like.
    
    


In another embodiment, the sum of m and o is 2, 3, or 4 wherein one CH2 may be replaced with S or O and 1 —CH2—CH2— may be replaced by —CH═CH— or —C≡C—.
In another embodiment, the sum of m and o is 3 wherein one CH2 may be replaced with S or O and 1 —CH2—CH2— may be replaced by —CH═CH— or —C≡C—.
In another embodiment, the sum of m and o is 2 wherein one CH2 may be replaced with S or O or 1 —CH2—CH2— may be replaced by —CH═CH— or —C≡C—.
In another embodiment, the sum of m and o is 4 wherein one CH2 may be replaced with S or O and 1 —CH2—CH2— may be replaced by —CH═CH— or —C≡C—.
Interarylene or heterointerarylene refers to an aryl ring or ring system or a heteroaryl ring or ring system which connects two other parts of a molecule, i.e. the two parts are bonded to the ring in two distinct ring positions. Interarylene or heterointerarylene may be substituted or unsubstituted. Unsubstituted interarylene or heterointerarylene has no substituents other than the two parts of the molecule it connects. Substituted interarylene or heterointerarylene has substituents in addition to the two parts of the molecule it connects.
In one embodiment, Ar is substituted or unsubstituted interphenylene, interthienylene, interfurylene, interpyridinylene, interoxazolylene, and interthiazolylene. In another embodiment Ar is interphenylene (Ph). In another embodiment A is —(CH2)2-Ph-. Substitutents of Ar each have from 0 to 4 carbon atoms, from 0 to 3 oxygen atoms, from 0 to 2 sulfur atoms, from 0 to 2 nitrogen atoms, from 0 to 3 fluorine atoms, from 0 to 1 chlorine atoms, from 0 to 1 bromine atoms, from 0 to 1 iodine atoms, and from 0 to 10 hydrogen atoms.
In another embodiment A is —CH2—Ar—OCH2—. In another embodiment A is —CH2-Ph-OCH2—. In another embodiment, Ph is attached at the 1 and 3 positions, otherwise known as m-interphenylene, such as when A has the structure shown below.




In another embodiment A is —(CH2)6—, cis —CH2CH═CH—(CH2)3—, or —CH2C≡C—(CH2)3—, wherein 1 or 2 carbon atoms may be replaced with S or O; or A is —(CH2)2-Ph- wherein one —CH2— may be replaced with S or O.
In another embodiment A is —(CH2)6—, cis —CH2CH═CH—(CH2)3—, or —CH2C≡C—(CH2)3—, wherein 1 or 2 carbon atoms may be replaced with S or O; or A is —(CH2)2-Ph-.
In one embodiment, Ar is thienyl.
In other embodiments, A has one of the following structures.




In another embodiment A is —CH2OCH2Ar—.
In another embodiment A is —CH2SCH2Ar—.
In another embodiment A is —(CH2)3Ar—.
In another embodiment A is —CH2—O—(CH2)4—.
In another embodiment A is —CH2S(CH2)4—.
In another embodiment A is —(CH2)6—.
In another embodiment A is cis —CH2CH═CH—(CH2)3—.
In another embodiment A is —CH2C≡C—(CH2)3—.
In another embodiment A is —S(CH2)3S(CH2)2—.
In another embodiment A is —(CH2)4OCH2—.
In another embodiment A is cis —CH2CH═CH—CH2OCH2—.
In another embodiment A is —CH2CH≡CH—CH2OCH2—.
In another embodiment A is —(CH2)2S(CH2)3—.
In another embodiment A is —CH2-Ph-OCH2—, wherein Ph is interphenylene.
In another embodiment A is —CH2-mPh-OCH2—, wherein mPh is m-interphenylene.
In another embodiment A is —CH2—O—(CH2)4—.
In another embodiment A is —CH2—O—CH2—Ar—, wherein Ar is 2,5-interthienylene.
In another embodiment A is —CH2—O—CH2—Ar—, wherein Ar is 2,5-interfurylene.
In another embodiment A is (3-methylphenoxy)methyl.
In another embodiment A is (4-but-2-ynyloxy)methyl.
In another embodiment A is 2-(2-ethylthio)thiazol-4-yl.
In another embodiment A is 2-(3-propyl)thiazol-5-yl.
In another embodiment A is 3-(methoxymethyl)phenyl.
In another embodiment A is 3-(3-propylphenyl).
In another embodiment A is 3-methylphenethyl.
In another embodiment A is 4-(2-ethyl)phenyl.
In another embodiment A is 4-phenethyl.
In another embodiment A is 4-methoxybutyl.
In another embodiment A is 5-(methoxymethyl)furan-2-yl.
In another embodiment A is 5-(methoxymethyl)thiophen-2-yl.
In another embodiment A is 5-(3-propyl)furan-2-yl.
In another embodiment A is 5-(3-propyl)thiophen-2-yl.
In another embodiment A is 6-hexyl.
In another embodiment A is (Z)-6-hex-4-enyl.
Interarylene or heterointerarylene refers to an aryl ring or ring system or a heteroaryl ring or ring system which connects two other parts of a molecule, i.e. the two parts are bonded to the ring in two distinct ring positions. Interarylene or heterointerarylene may be substituted or unsubstituted. Unsubstituted interarylene or heterointerarylene has no substituents other than the two parts of the molecule it connects. Substituted interarylene or heterointerarylene has substituents in addition to the two parts of the molecule it connects.
In one embodiment, Ar is substituted or unsubstituted interphenylene, interthienylene, interfurylene, interpyridinylene, interoxazolylene, and interthiazolylene. In another embodiment Ar is interphenylene (Ph). In another embodiment A is —(CH2)2-Ph-. While not intending to limit scope of the invention in any way, substituents may have 4 or less heavy atoms, wherein the heavy atoms are C, N, O, S, P, F, Cl, Br, and/or I in any stable combination. Any number of hydrogen atoms required for a particular substituent will also be included. A substituent must be stable enough for the compound to be useful as described herein. In addition to the atoms listed above, a substituent may also have a metal cation or any other stable cation having an atom not listed above if the substituent is acidic and the salt form is stable. For example, —OH may form an —O—Na+ salt or CO2H may form a CO2—K+ salt. Any cation of the salt is not counted in the “4 or less heavy atoms.” Thus, the substituent may be
hydrocarbyl having up to 4 carbon atoms, including alkyl up to C4, alkenyl, alkynyl, and the like;
hydrocarbyloxy up to C3;
organic acid such as CO2H, SO3H, P(O)(OH)2, and the like, and salts thereof;
CF3;
halo, such as F, Cl, or Br;
hydroxyl;
NH2 and alkylamine functional groups up to C3;
other N or S containing substituents such as CN, NO2, and the like;
and the like.
In one embodiment A is —(CH2)m-Ph-(CH2)o— wherein the sum of m and o is 1, 2, or 3, and wherein one CH2 may be replaced with S or O.
In another embodiment A is —CH2—Ar—OCH2—. In another embodiment A is —CH2-Ph-OCH2—. In another embodiment, Ph is attached at the 1 and 3 positions, otherwise known as m-interphenylene, such as when A has the structure shown below.




In another embodiment A is —(CH2)6—, cis —CH2CH═CH—(CH2)3—, or —CH2C≡C—(CH2)3—, wherein 1 or 2 carbon atoms may be replaced with S or O; or A is —(CH2)2-Ph- wherein one CH2 may be replaced with S or O.
In another embodiment A is —(CH2)6—, cis —CH2CH═CH—(CH2)3—, or —CH2C≡C—(CH2)3—, wherein 1 or 2 carbon atoms may be replaced with S or O; or A is —(CH2)2-Ph-.
In other embodiments, A has one of the following structures, where Y is attached to the aromatic or heteroaromatic ring.




In another embodiment A is —CH2OCH2Ar.
In another embodiment A is —CH2SCH2Ar.
In another embodiment A is —(CH2)3Ar.
In another embodiment A is —CH2—O—(CH2)4.
In another embodiment A is —CH2S(CH2)4.
In another embodiment A is —(CH2)6—.
In another embodiment A is cis —CH2CH═CH—(CH2)3—.
In another embodiment A is —CH2C≡C—(CH2)3—.
In another embodiment A is —S(CH2)3S(CH2)2—.
In another embodiment A is —(CH2)4OCH2—.
In another embodiment A is cis —CH2CH═CH—CH2OCH2—.
In another embodiment A is —CH2CH≡CH—CH2OCH2—.
In another embodiment A is —(CH2)2S(CH2)3—.
In another embodiment A is —CH2-Ph-OCH2—, wherein Ph is interphenylene.
In another embodiment A is —CH2-mPh-OCH2—, wherein mPh is m-interphenylene.
In another embodiment A is —CH2—O—(CH2)4—.
In another embodiment A is —CH2—O—CH2—Ar—, wherein Ar is 2,5-interthienylene.
In another embodiment A is —CH2—O—CH2—Ar—, wherein Ar is 2,5-interfurylene.
In another embodiment A is (3-methylphenoxy)methyl.
In another embodiment A is (4-but-2-ynyloxy)methyl.
In another embodiment A is 2-(2-ethylthio)thiazol-4-yl.
In another embodiment A is 2-(3-propyl)thiazol-5-yl.
In another embodiment A is 3-methoxymethyl)phenyl.
In another embodiment A is 3-(3-propylphenyl.
In another embodiment A is 3-methylphenethyl.
In another embodiment A is 4-(2-ethyl)phenyl.
In another embodiment A is 4-phenethyl.
In another embodiment A is 4-methoxybutyl.
In another embodiment A is 5-(methoxymethyl)furan-2-yl.
In another embodiment A is 5-(methoxymethyl)thiophen-2-yl.
In another embodiment A is 5-(3-propyl)furan-2-yl.
In another embodiment A is 5-(3-propyl)thiophen-2-yl.
In another embodiment A is 6-hexyl.
In another embodiment A is (Z)-6-hex-4-enyl.
Compounds according to the each of the structures depicted below, and pharmaceutically acceptable salts thereof, and prodrugs thereof, are contemplated as individual embodiments. In other words, each structure represents a different embodiment.







E is SO2 or CO. Thus, each of the structures below is contemplated. These structures, or pharmaceutically acceptable salts thereof, or prodrugs thereof, individually represent a compound which is an embodiment contemplated herein. In other words, each structure represents a different embodiment.




G is alkyl, aryl or heteroaryl having 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 carbon atoms. Thus, each of the structures below is contemplated. These structures, or pharmaceutically acceptable salts thereof, or prodrugs thereof, individually represent a compound which is an embodiment contemplated herein. In other words, each structure represents a different embodiment.




Aryl is an aromatic ring or ring system such as phenyl, naphthyl, biphenyl, and the like.
Heteroaryl is aryl having one or more N, O, or S atoms in the ring, i.e. one or more ring carbons are substituted by N, O, and/or S. While not intending to be limiting, examples of heteroaryl include thienyl, pyridinyl, furyl, benzothienyl, benzofuryl, imidizololyl, indolyl, and the like.
A substituent of aryl or heteroaryl may have up to 20 non-hydrogen atoms each in any stable combination and as many hydrogen atoms as necessary, wherein the non-hydrogen atoms are C, N, O, S, P, F, Cl, Br, and/or I in any stable combination. However, the total number of non-hydrogen atoms on all of the substituents combined must also be 20 or less. A substituent must be sufficiently stable for the compound to be useful as described herein. In addition to the atoms listed above, a substituent may also have a metal cation or other stable cation having an atom not listed above if the substituent is acidic and the salt form is stable. For example, —OH may form an —O—Na+ salt or CO2H may form a CO2—K+ salt. Thus, while not intending to limit the scope of the invention in any way, a substituent may be:
hydrocarbyl, i.e. a moiety consisting of only carbon and hydrogen such as alkyl, alkenyl, alkynyl, and the like, including linear, branched or cyclic hydrocarbyl, and combinations thereof;
hydrocarbyloxy, meaning O-hydrocarbyl such as OCH3, OCH2CH3, O-cyclohexyl, etc, up to 19 carbon atoms;
other ether substituents such as CH2OCH3, (CH2)2OCH(CH3)2, and the like;
thioether substituents including S-hydrocarbyl and other thioether substituents;
hydroxyhydrocarbyl, meaning hydrocarbyl-OH such as CH2OH, C(CH3)2OH, etc, up to 19 carbon atoms;
nitrogen substituents such as NO2, CN, and the like, including
amino, such as NH2, NH(CH2CH3OH), NHCH3, and the like up to 19 carbon atoms;
carbonyl substituents, such as CO2H, ester, amide, and the like;
halogen, such as chloro, fluoro, bromo, and the like
fluorocarbyl, such as CF3, CF2CF3, etc.;
phosphorous substituents, such as PO32−, and the like;
sulfur substituents, including S-hydrocarbyl, SH, SO3H, SO2-hydrocarbyl, SO3-hydrocarbyl, and the like.
Substituted aryl or heteroaryl may have as many substituents as the ring or ring system will bear, and the substituents may be the same or different. Thus, for example, an aryl ring or a heteroaryl ring may be substituted with chloro and methyl; methyl, OH, and F; CN, NO2, and ethyl; and the like including any conceivable substituent or combination of substituent possible in light of this disclosure.
Substituted aryl or substituted heteroaryl also includes a bicyclic or polycyclic ring system wherein one or more rings are aromatic and one or more rings are not. For example, indanonyl, indanyl, indanolyl, tetralonyl, and the like are substituted aryl. For this type of polycyclic ring system, an aromatic or heteroaromatic ring, not a non-aromatic ring, must be attached to the remainder of the molecule. In other words, in any structure depicting —B herein, where — is a bond, the bond is a direct bond to an aromatic ring.
In one embodiment, B is substituted aryl or heteroaryl.
In another embodiment B is substituted phenyl.
In another embodiment B has no halogen atoms.
In another embodiment B is 4-(1-hydroxy-2,2-dimethylpropyl)phenyl.
In another embodiment B is 4-(1-hydroxy-2-methylpropan-2-yl)phenyl.
In another embodiment B is 4-(1-hydroxy-2-methylpropyl)phenyl.
In another embodiment B is 4-(1-hydroxybutyl)phenyl.
In another embodiment B is 4-(1-hydroxyheptyl)phenyl.
In another embodiment B is 4-(1-hydroxyhexyl)phenyl.
In another embodiment B is 4-(1-hydroxypentyl)phenyl.
In another embodiment B is 4-(1-hydroxypropyl)phenyl.
In another embodiment B is 4-(3-hydroxy-2-methylheptan-2-yl)phenyl.
In another embodiment B is 4-(3-hydroxy-2-methyloctan-2-yl)phenyl.
In another embodiment B is 1-hydroxy-2,3-dihydro-1H-inden-5-yl.
In another embodiment B is 2,3-dihydro-1H-inden-5-yl.
In another embodiment B is 3-(hydroxyl(1-propylcyclobutyl)methyl)phenyl.
In another embodiment B is 4-(1-hydroxy-5,5-dimethylhexyl)phenyl.
In another embodiment B is 4-(hydroxy(1-propylcyclobutyl)methyl)phenyl.
In another embodiment B is 4-tert-butylphenyl.
In another embodiment B is 4-hexylphenyl.
In another embodiment B is 4-(1-hydroxy-2-phenylethyl)phenyl.
In another embodiment B is 4-(1-hydroxy-3-phenylpropyl)phenyl.
In another embodiment B is 4-(1-hydroxycyclobutyl)phenyl.
In another embodiment B is 4-(2-cyclohexyl-1-hydroxyethyl)phenyl.
In another embodiment B is 4-(3-cyclohexyl-1-hydroxypropyl)phenyl.
In another embodiment B is 4-(cyclohexyl(hydroxy)methyl)phenyl.
In another embodiment B is 4-(cyclohexylmethyl)phenyl.
In another embodiment B is 4-(hydroxy(phenyl)methyl)phenyl.
Another embodiment is a compound according to the structure




or a pharmaceutical salt thereof, or a prodrug thereof,

wherein R is hydrogen or C1-10 hydrocarbyl.

Another embodiment is a compound according to the structure





or a pharmaceutical salt thereof, or a prodrug thereof,

wherein R is hydrogen or C1-10 hydrocarbyl.

Another embodiment is a compound according to the structure





or a pharmaceutical salt thereof, or a prodrug thereof,

wherein R is hydrogen or C1-10 hydrocarbyl.

Another embodiment is a compound according to the structure





“C1-10” hydrocarbyl is hydrocarbyl having 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 carbon atoms.
Hydrocarbyl is a moiety consisting of only carbon and hydrogen, and includes, but is not limited to alkyl, alkenyl, alkynyl, and the like, and in some cases aryl, and combinations thereof.
Alkyl is hydrocarbyl having no double or triple bonds including:
linear alkyl such as methyl, ethyl, propyl, n-butyl, n-pentyl, n-hexyl, and the like;
branched alkyl such as isopropyl, branched butyl isomers (i.e. sec-butyl, tert-butyl, etc), branched pentyl isomers (i.e. isopentyl, etc), branched hexyl isomers, and higher branched alkyl fragments;
cycloalkyl such as cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, etc.; and
alkyl fragments consisting of both cyclic and noncyclic components, whether linear or branched, which may be attached to the remainder of the molecule at any available position including terminal, internal, or ring carbon atoms.
Alkenyl is hydrocarbyl having one or more double bonds including linear alkenyl, branched alkenyl, cyclic alkenyl, and combinations thereof in analogy to alkyl.
Alkynyl is hydrocarbyl having one or more triple bonds including linear alkynyl, branched alkynyl, cyclic alkynyl and combinations thereof in analogy to alkyl.
Aryl is an unsubstituted or substituted aromatic ring or ring system such as phenyl, naphthyl, biphenyl, and the like. Aryl may or may not be hydrocarbyl, depending upon whether it has substituents with heteroatoms.
Arylalkyl is alkyl which is substituted with aryl. In other words alkyl connects aryl to the remaining part of the molecule.
Examples are —CH2-Phenyl, —CH2—CH2-Phenyl, and the like. Arylalkyl may or may not be hydrocarbyl, depending upon whether it has substituents with heteroatoms.
Unconjugated dienes or polyenes have one or more double bonds which are not conjugated. They may be linear, branched, or cyclic, or a combination thereof.
Combinations of the above are also possible.
Hydroxyalkylaryl is aryl, including phenyl, heteroaryl and the like, which is substituted with hydroxyalkyl. Hydroxyalkyl is alkyl, whether linear, branched, cyclic, or a combination thereof, which has a hydroxyl substituent. For example, CHOH(CH2)4—CH3 is hydroxyalkyl, and phenyl-CHOH(CH2)4—CH3, is hydroxyalkylaryl.
Thus, each of the structures below is contemplated. These structures, or pharmaceutically acceptable salts thereof, or prodrugs thereof, individually represent a compound which is an embodiment contemplated herein. In other words, each structure represents a different embodiment.













In the above embodiments, x is 5, 6, or 7, and y+z is 2x+1.
In one embodiment, x is 5 and y+z is 11.
In another embodiment, x is 6 and y+z is 13.
In another embodiment, x is 7 and y+z is 15.
Hypothetical examples of useful compounds are shown below.



























COMPOUND EXAMPLES
The following are hypothetical examples of useful compounds:
Compound Example 1
A compound having a structure




or a pharmaceutically acceptable salt thereof, or a prodrug thereof;

wherein Y is an organic acid functional group, or an amide or ester thereof comprising up to 14 carbon atoms; or Y is hydroxymethyl or an ether thereof comprising up to 14 carbon atoms; or Y is a tetrazolyl functional group;

A is —(CH2)6—, cis —CH2CH═CH—(CH2)3—, or —CH2C≡C—(CH2)3—, wherein 1 or 2 carbon atoms may be replaced by S or O; or A is —(CH2)m—Ar—(CH2)o— wherein Ar is interarylene or heterointerarylene, the sum of m and o is 1, 2, 3, or 4, and wherein 1 —CH2— may be replaced by S or O, and 1 —CH2—CH2— may be replaced by —CH═CH— or —C≡C—;

J is C═O, CHOH, CHF, CHCl, CHBr, or CHCN; and

B is substituted aryl or substituted heteroaryl.

Compound Example 2
The compound according to compound example 1 wherein Y is selected from CO2R2, CON(R2)2, CON(OR2)R2, CON(CH2CH2OH)2, CONH(CH2CH2OH), CH2OH, P(O)(OH)2, CONHSO2R2, SO2N(R2)2, SO2NHR2,




wherein R2 is independently H, C1-C6 alkyl, unsubstituted phenyl, or unsubstituted biphenyl.

Compound Example 3
The compound according to compound example 1 or 2 wherein B is substituted phenyl.
Compound Example 4
The compound according to compound example 1 or 2 having a structure




or a pharmaceutically acceptable salt thereof, or a prodrug thereof;

R is hydrogen or C1-10 hydrocarbyl.

Compound Example 5
The compound according to compound example 4 wherein R is alkyl.
Compound Example 6
The compound according to compound example 4 wherein R is arylalkyl.
Compound Example 7
The compound according to any one of compound examples 1 to 6 having a structure




or a pharmaceutically acceptable salt thereof, or a prodrug thereof;

R is hydrogen or C1-10 hydrocarbyl.

Compound Example 8
The compound according to compound example 1 or 2 wherein A is (3-methylphenoxy)methyl.
Compound Example 9
The compound according to compound example 1 or 2 wherein A is (4-but-2-ynyloxy)methyl.
Compound Example 10
The compound according to compound example 1 or 2 wherein A is 2-(2-ethylthio)thiazol-4-yl.
Compound Example 11
The compound according to compound example 1 or 2 wherein A is 2-(3-propyl)thiazol-5-yl.
Compound Example 12
The compound according to compound example 1 or 2 wherein A is 3-methoxymethyl)phenyl.
Compound Example 13
The compound according to compound example 1 or 2 wherein A is 3-(3-propylphenyl.
Compound Example 14
The compound according to compound example 1 or 2 wherein A is 3-methylphenethyl.
Compound Example 15
The compound according to compound example 1 or 2 wherein A is 4-(2-ethyl)phenyl.
Compound Example 16
The compound according to compound example 1 or 2 wherein A is 4-phenethyl.
Compound Example 17
The compound according to compound example 1 or 2 wherein A is 4-methoxybutyl.
Compound Example 18
The compound according to compound example 1 or 2 wherein A is 5-(methoxymethyl)furan-2-yl.
Compound Example 19
The compound according to compound example 1 or 2 wherein A is 5-(methoxymethyl)thiophen-2-yl.
Compound Example 20
The compound according to compound example 1 or 2 wherein A is 5-(3-propyl)furan-2-yl.
Compound Example 21
The compound according to compound example 1 or 2 wherein A is 5-(3-propyl)thiophen-2-yl.
Compound Example 22
The compound according to compound example 1 or 2 wherein A is 6-hexyl.
Compound Example 23
The compound according to compound example 1 or 2 wherein A is (Z)-6-hex-4-enyl.
Compound Example 24
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-(1-hydroxy-2,2-dimethylpropyl)phenyl.
Compound Example 25
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-(1-hydroxy-2-methylpropan-2-yl)phenyl.
Compound Example 26
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-(1-hydroxy-2-methylpropyl)phenyl.
Compound Example 27
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-(1-hydroxybutyl)phenyl.
Compound Example 28
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-(1-hydroxyheptyl)phenyl.
Compound Example 29
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-(1-hydroxyhexyl)phenyl.
Compound Example 30
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-(1-hydroxypentyl)phenyl.
Compound Example 31
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-(1-hydroxypropyl)phenyl.
Compound Example 32
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-(3-hydroxy-2-methylheptan-2-yl)phenyl.
Compound Example 33
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-(3-hydroxy-2-methyloctan-2-yl)phenyl.
Compound Example 34
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 1-hydroxy-2,3-dihydro-1H-inden-5-yl.
Compound Example 35
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 2,3-dihydro-1H-inden-5-yl.
Compound Example 36
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 3-(hydroxy(1-propylcyclobutyl)methyl)phenyl.
Compound Example 37
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-(1-hydroxy-5,5-dimethylhexyl)phenyl.
Compound Example 38
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-(hydroxy(1-propylcyclobutyl)methyl)phenyl.
Compound Example 39
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-tert-butylphenyl.
Compound Example 40
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-hexylphenyl.
Compound Example 41
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-(1-hydroxy-2-phenylethyl)phenyl.
Compound Example 42
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-(1-hydroxy-3-phenylpropyl)phenyl.
Compound Example 43
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-(1-hydroxycyclobutyl)phenyl.
Compound Example 44
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-(2-cyclohexyl-1-hydroxyethyl)phenyl.
Compound Example 45
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-(3-cyclohexyl-1-hydroxypropyl)phenyl.
Compound Example 46
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-(cyclohexyl(hydroxy)methyl)phenyl.
Compound Example 47
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-(cyclohexylmethyl)phenyl.
Compound Example 48
The compound according to any one of compound examples 1, 2, and 8-23 wherein B is 4-(hydroxy(phenyl)methyl)phenyl.
Compound Example 49
The compound according to compound example 1 having a structure




wherein a dashed line represents the presence or absence of a bond; and

R20 is OH, O, or halo.

Compound Example 50
The compound according to compound example 49 having a structure




Compound Example 51
The compound according to compound example 49 having a structure




Compound Example 52
The compound according to compound example 49 having a structure




Compound Example 53
The compound according to compound example 49 having a structure




Compound Example 54
The compound according to compound example 49 having a structure




The following are hypothetical examples of compositions, kits, methods, uses, and medicaments employing the hypothetical compound examples.
Composition Example
A composition comprising a compound according to any one of compound examples 1 to 52, wherein said composition is a liquid which is ophthalmically acceptable.
Medicament Examples
Use of a compound according to any one of compound examples 1 to 52 in the manufacture of a medicament for the treatment of glaucoma or ocular hypertension in a mammal.
A medicament comprising a compound according to any one of compound examples 1 to 52, wherein said composition is a liquid which is ophthalmically acceptable.
Method Example
A method comprising administering a compound according to any one of compound examples 1 to 52 to a mammal for the treatment of glaucoma or ocular hypertension.
Kit Example
A kit comprising a composition comprising compound according to any one of compound examples 1 to 52, a container, and instructions for administration of said composition to a mammal for the treatment of glaucoma or ocular hypertension.
A “pharmaceutically acceptable salt” is any salt that retains the activity of the parent compound and does not impart any additional deleterious or untoward effects on the subject to which it is administered and in the context in which it is administered compared to the parent compound. A pharmaceutically acceptable salt also refers to any salt which may form in vivo as a result of administration of an acid, another salt, or a prodrug which is converted into an acid or salt.
Pharmaceutically acceptable salts of acidic functional groups may be derived from organic or inorganic bases. The salt may comprise a mono or polyvalent ion. Of particular interest are the inorganic ions lithium, sodium, potassium, calcium, and magnesium. Organic salts may be made with amines, particularly ammonium salts such as mono-, di- and trialkyl amines or ethanol amines. Salts may also be formed with caffeine, tromethamine and similar molecules. Hydrochloric acid or some other pharmaceutically acceptable acid may form a salt with a compound that includes a basic group, such as an amine or a pyridine ring.
A “prodrug” is a compound which is converted to a therapeutically active compound after administration, and the term should be interpreted as broadly herein as is generally understood in the art. While not intending to limit the scope of the invention, conversion may occur by hydrolysis of an ester group or some other biologically labile group. Generally, but not necessarily, a prodrug is inactive or less active than the therapeutically active compound to which it is converted. Ester prodrugs of the compounds disclosed herein are specifically contemplated. An ester may be derived from a carboxylic acid of Cl (i.e. the terminal carboxylic acid of a natural prostaglandin), or an ester may be derived from a carboxylic acid functional group on another part of the molecule, such as on a phenyl ring. While not intending to be limiting, an ester may be an alkyl ester, an aryl ester, or a heteroaryl ester. The term alkyl has the meaning generally understood by those skilled in the art and refers to linear, branched, or cyclic alkyl moieties. C1-6 alkyl esters are particularly useful, where alkyl part of the ester has from 1 to 6 carbon atoms and includes, but is not limited to, methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, iso-butyl, t-butyl, pentyl isomers, hexyl isomers, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, and combinations thereof having from 1-6 carbon atoms, etc.
Those skilled in the art will readily understand that for administration or the manufacture of medicaments the compounds disclosed herein can be admixed with pharmaceutically acceptable excipients which per se are well known in the art. Specifically, a drug to be administered systemically, it may be confected as a powder, pill, tablet or the like, or as a solution, emulsion, suspension, aerosol, syrup or elixir suitable for oral or parenteral administration or inhalation.
For solid dosage forms or medicaments, non-toxic solid carriers include, but are not limited to, pharmaceutical grades of mannitol, lactose, starch, magnesium stearate, sodium saccharin, the polyalkylene glycols, talcum, cellulose, glucose, sucrose and magnesium carbonate. The solid dosage forms may be uncoated or they may be coated by known techniques to delay disintegration and absorption in the gastrointestinal tract and thereby provide a sustained action over a longer period. For example, a time delay material such as glyceryl monostearate or glyceryl distearate may be employed. They may also be coated by the technique described in the U.S. Pat. Nos. 4,256,108; 4,166,452; and 4,265,874 to form osmotic therapeutic tablets for control release. Liquid pharmaceutically administrable dosage forms can, for example, comprise a solution or suspension of one or more of the presently useful compounds and optional pharmaceutical adjutants in a carrier, such as for example, water, saline, aqueous dextrose, glycerol, ethanol and the like, to thereby form a solution or suspension. If desired, the pharmaceutical composition to be administered may also contain minor amounts of nontoxic auxiliary substances such as wetting or emulsifying agents, pH buffering agents and the like. Typical examples of such auxiliary agents are sodium acetate, sorbitan monolaurate, triethanolamine, sodium acetate, triethanolamine oleate, etc. Actual methods of preparing such dosage forms are known, or will be apparent, to those skilled in this art; for example, see Remington's Pharmaceutical Sciences, Mack Publishing Company, Easton, Pa., 16th Edition, 1980. The composition of the formulation to be administered, in any event, contains a quantity of one or more of the presently useful compounds in an amount effective to provide the desired therapeutic effect.
Parenteral administration is generally characterized by injection, either subcutaneously, intramuscularly or intravenously. Injectables can be prepared in conventional forms, either as liquid solutions or suspensions, solid forms suitable for solution or suspension in liquid prior to injection, or as emulsions. Suitable excipients are, for example, water, saline, dextrose, glycerol, ethanol and the like. In addition, if desired, the injectable pharmaceutical compositions to be administered may also contain minor amounts of non-toxic auxiliary substances such as wetting or emulsifying agents, pH buffering agents and the like.
The amount of the presently useful compound or compounds administered is dependent on the therapeutic effect or effects desired, on the specific mammal being treated, on the severity and nature of the mammal's condition, on the manner of administration, on the potency and pharmacodynamics of the particular compound or compounds employed, and on the judgment of the prescribing physician. The therapeutically effective dosage of the presently useful compound or compounds may be in the range of about 0.5 or about 1 to about 100 mg/kg/day.
A liquid which is ophthalmically acceptable is formulated such that it can be administered topically to the eye. The comfort should be maximized as much as possible, although sometimes formulation considerations (e.g. drug stability) may necessitate less than optimal comfort. In the case that comfort cannot be maximized, the liquid should be formulated such that the liquid is tolerable to the patient for topical ophthalmic use. Additionally, an ophthalmically acceptable liquid should either be packaged for single use, or contain a preservative to prevent contamination over multiple uses.
For ophthalmic application, solutions or medicaments are often prepared using a physiological saline solution as a major vehicle. Ophthalmic solutions should preferably be maintained at a comfortable pH with an appropriate buffer system. The formulations may also contain conventional, pharmaceutically acceptable preservatives, stabilizers and surfactants.
Preservatives that may be used in the pharmaceutical compositions of the present invention include, but are not limited to, benzalkonium chloride, chlorobutanol, thimerosal, phenylmercuric acetate and phenylmercuric nitrate. A useful surfactant is, for example, Tween 80. Likewise, various useful vehicles may be used in the ophthalmic preparations of the present invention. These vehicles include, but are not limited to, polyvinyl alcohol, povidone, hydroxypropyl methyl cellulose, poloxamers, carboxymethyl cellulose, hydroxyethyl cellulose and purified water.
Tonicity adjustors may be added as needed or convenient. They include, but are not limited to, salts, particularly sodium chloride, potassium chloride, mannitol and glycerin, or any other suitable ophthalmically acceptable tonicity adjustor.
Various buffers and means for adjusting pH may be used so long as the resulting preparation is ophthalmically acceptable. Accordingly, buffers include acetate buffers, citrate buffers, phosphate buffers and borate buffers. Acids or bases may be used to adjust the pH of these formulations as needed.
In a similar vein, an ophthalmically acceptable antioxidant for use in the present invention includes, but is not limited to, sodium metabisulfite, sodium thiosulfate, acetylcysteine, butylated hydroxyanisole and butylated hydroxytoluene.
Other excipient components which may be included in the ophthalmic preparations are chelating agents. A useful chelating agent is edetate disodium, although other chelating agents may also be used in place or in conjunction with it.
The ingredients are usually used in the following amounts:














Ingredient
Amount (% w/v)









active ingredient
about 0.001-5



preservative
0-0.10



vehicle
0-40



tonicity adjuster
1-10



buffer
0.01-10



pH adjuster
q.s. pH 4.5-7.5



antioxidant
as needed



surfactant
as needed



purified water
as needed to make 100%










For topical use, creams, ointments, gels, solutions or suspensions, etc., containing the compound disclosed herein are employed. Topical formulations may generally be comprised of a pharmaceutical carrier, cosolvent, emulsifier, penetration enhancer, preservative system, and emollient.
The actual dose of the active compounds of the present invention depends on the specific compound, and on the condition to be treated; the selection of the appropriate dose is well within the knowledge of the skilled artisan.
The compounds disclosed herein are also useful in combination with other drugs useful for the treatment of glaucoma or other conditions.
For the treatment of glaucoma, combination treatment with the following classes of drugs are contemplated:
β-Blockers (or β-adrenergic antagonists) including carteolol, levobunolol, metiparanolol, timolol hemihydrate, timolol maleate, β1-selective antagonists such as betaxolol, and the like, or pharmaceutically acceptable salts or prodrugs thereof;
Adrenergic Agonists including
non-selective adrenergic agonists such as epinephrine borate, epinephrine hydrochloride, and dipivefrin, and the like, or pharmaceutically acceptable salts or prodrugs thereof; and
α2-selective adrenergic agonists such as apraclonidine, brimonidine, and the like, or pharmaceutically acceptable salts or prodrugs thereof;
Carbonic Anhydrase Inhibitors including acetazolamide, dichlorphenamide, methazolamide, brinzolamide, dorzolamide, and the like, or pharmaceutically acceptable salts or prodrugs thereof;
Cholinergic Agonists including
direct acting cholineraic agonists such as carbachol, pilocarpine hydrochloride, pilocarbine nitrate, pilocarpine, and the like, or pharmaceutically acceptable salts or prodrugs thereof;
chlolinesterase inhibitors such as demecarium, echothiophate, physostigmine, and the like, or pharmaceutically acceptable salts or prodrugs thereof;
Glutamate Antagonists and other neuroprotective agents such as Ca2+ channel blockers such as memantine, amantadine, rimantadine, nitroglycerin, dextrophan, detromethorphan, CGS-19755, dihydropyridines, verapamil, emopamil, benzothiazepines, bepridil, diphenylbutylpiperidines, diphenylpiperazines, HOE 166 and related drugs, fluspirilene, eliprodil, ifenprodil, CP-101,606, tibalosine, 2309BT, and 840S, flunarizine, nicardipine, nifedimpine, nimodipine, barnidipine, verapamil, lidoflazine, prenylamine lactate, amiloride, and the like, or pharmaceutically acceptable salts or prodrugs thereof;

Prostamides such as bimatoprost, or pharmaceutically acceptable salts or prodrugs thereof; and

Prostaglandins including travoprost, UFO-21, chloprostenol, fluprostenol, 13,14-dihydro-chloprostenol, isopropyl unoprostone, latanoprost and the like.

Cannabinoids including CB1 agonists such as WIN-55212-2 and CP-55940 and the like, or pharmaceutically acceptable salts or prodrugs thereof.

For treatment of diseases affecting the eye including glaucoma, these compounds can be administered topically, periocularly, intraocularly, or by any other effective means known in the art.
In addition to the treatment of glaucoma, prostaglandin EP2 selective agonists are believed to have several medical uses. For example, U.S. Pat. No. 6,437,146 teaches the use of prostaglandin EP2 selective agonists “for treating or preventing inflammation and pain in joint and muscle (e.g., rheumatoid arthritis, rheumatoid spondylitis, osteoarthritis, gouty arthritis, juvenile arthritis, etc.), inflammatory skin condition (e.g., sunburn, burns, eczema, dermatitis, etc.), inflammatory eye condition (e.g., conjunctivitis, etc.), lung disorder in which inflammation is involved (e.g., asthma, bronchitis, pigeon fancier's disease, farmer's lung, etc.), condition of the gastrointestinal tract associated with inflammation (e.g., aphthous ulcer, Chrohn's disease, atrophic gastritis, gastritis varialoforme, ulcerative colitis, coeliac disease, regional ileitis, irritable bowel syndrome, etc.), gingivitis, inflammation, pain and tumescence after operation or injury, pyrexia, pain and other conditions associated with inflammation, allergic disease, systemic lupus crythematosus, scleroderma, polymyositis, tendinitis, bursitis, periarteritis nodose, rheumatic fever, Sjgren's syndrome, Behcet disease, thyroiditis, type I diabetes, diabetic complication (diabetic microangiopathy, diabetic retinopathy, diabetic neohropathy, etc.), nephrotic syndrome, aplastic anemia, myasthenia gravis, uveitis contact dermatitis, psoriasis, Kawasaki disease, sarcoidosis, Hodgkin's disease, Alzheimers disease, kidney dysfunction (nephritis, nephritic syndrome, etc.), liver dysfunction (hepatitis, cirrhosis, etc.), gastrointestinal dysfunction (diarrhea, inflammatory bowel disease, etc.) shock, bone disease characterized by abnormal bone metabolism such as osteoporosis (especially, postmenopausal osteoporosis), hypercalcemia, hyperparathyroidism, Paget's bone diseases, osteolysis, hypercalcemia of malignancy with or without bone metastases, rheumatoid arthritis, periodonritis, osteoarthritis, ostealgia, osteopenia, cancer cachexia, calculosis, lithiasis (especially, urolithiasis), solid carcinoma, mesangial proliferative glomerulonephritis, edema (e.g. cardiac edema, cerebral edema, etc.), hypertension such as malignant hypertension or the like, premenstrual tension, urinary calculus, oliguria such as the one caused by acute or chronic failure, hyperphosphaturia, or the like.”
U.S. Pat. No. 6,710,072 teaches the use of EP2 agonists for the treatment or prevention of “osteoporosis, constipation, renal disorders, sexual dysfunction, baldness, diabetes, cancer and in disorder of immune regulation . . . various pathophysiological diseases including acute myocardial infarction, vascular thrombosis, hypertension, pulmonary hypertension, ischemic heart disease, congestive heart failure, and angina pectoris.”
These compounds can also be used to treat or prevent conditions affecting the posterior part of the eye including maculopathies/retinal degeneration such as non-exudative age related macular degeneration (ARMD), exudative age related macular degeneration (ARMD), choroidal neovascularization, diabetic retinopathy, acute macular neuroretinopathy, central serous chorioretinopathy, cystoid macular edema, and diabetic macular edema; uveitis/retinitis/choroiditis such as acute multifocal placoid pigment epitheliopathy, Behcet's disease, birdshot retinochoroidopathy, infectious (syphilis, lyme, tuberculosis, toxoplasmosis), intermediate uveitis (pars planitis), multifocal choroiditis, multiple evanescent white dot syndrome (mewds), ocular sarcoidosis, posterior scleritis, serpiginous choroiditis, subretinal fibrosis and uveitis syndrome, Vogt-Koyanagi- and Harada syndrome; vasuclar diseases/exudative diseases such as retinal arterial occlusive disease, central retinal vein occlusion, disseminated intravascular coagulopathy, branch retinal vein occlusion, hypertensive fundus changes, ocular ischemic syndrome, retinal arterial microaneurysms, Coat's disease, parafoveal telangiectasis, hemi-retinal vein occlusion, papillophlebitis, central retinal artery occlusion, branch retinal artery occlusion, carotid artery disease (CAD), frosted branch angiitis, sickle cell retinopathy and other hemoglobinopathies, angioid streaks, familial exudative vitreoretinopathy, and Eales disease; traumatic/surgical conditions such as sympathetic ophthalmia, uveitic retinal disease, retinal detachment, trauma, conditions caused by laser, conditions caused by photodynamic therapy, photocoagulation, hypoperfusion during surgery, radiation retinopathy, and bone marrow transplant retinopathy; proliferative disorders such as proliferative vitreal retinopathy and epiretinal membranes, and proliferative diabetic retinopathy; infectious disorders such as ocular histoplasmosis, ocular toxocariasis, presumed ocular histoplasmosis syndrome (POHS), endophthalmitis, toxoplasmosis, retinal diseases associated with HIV infection, choroidal disease associate with HIV infection, uveitic disease associate with HIV infection, viral retinitis, acute retinal necrosis, progressive outer retinal necrosis, fungal retinal diseases, ocular syphilis, ocular tuberculosis, diffuse unilateral subacute neuroretinitis, and myiasis; genetic disorders such as retinitis pigmentosa, systemic disorders with accosiated retinal dystrophies, congenital stationary night blindness, cone dystrophies, Stargardt's disease and fundus flavimaculatus, Best's disease, pattern dystrophy of the retinal pigmented epithelium, X-linked retinoschisis, Sorsby's fundus dystrophy, benign concentric maculopathy, Bietti's crystalline dystrophy, and pseudoxanthoma elasticum; retinal tears/holes such as retinal detachment, macular hole, and giant retinal tear; tumors such as retinal disease associated with tumors, congenital hypertrophy of the retinal pigmented epithelium, posterior uveal melanoma, choroidal hemangioma, choroidal osteoma, choroidal metastasis, combined hamartoma of the retina and retinal pigmented epithelium, retinoblastoma, vasoproliferative tumors of the ocular fundus, retinal astrocytoma, and intraocular lymphoid tumors; and miscellaneous other diseases affecting the posterior part of the eye such as punctate inner choroidopathy, acute posterior multifocal placoid pigment epitheliopathy, myopic retinal degeneration, and acute retinal pigement epitheliitis. Preferably, the disease or condition is retinitis pigmentosa, proliferative vitreal retinopathy (PVR), age-related macular degeneration (ARMD), diabetic retinopathy, diabetic macular edema, retinal detachment, retinal tear, uveitus, or cytomegalovirus retinitis.
These compounds are also useful in treating asthma.
Synthetic Methods




While there are many ways to prepare the compounds disclosed herein, one exemplary synthesis may begin with an alkyl halide or alkyl sulfonate (1, X=halide or sulfonate, see Scheme 1). Compounds such as 1 are commercially available or may be made according to published literature procedures (e.g. methyl 4-(3-bromopropyl)benzoate [Bioorg. Med. Chem. Lett. 2006, 16, 1799-1802] and methyl 5-[4-(mesyloxy)butyl]thiophene-2-carboxylate [J. Med. Chem. 1992, 35, 1109-1116]). Conversion of 1 to 2 takes place via an azide intermediate. In some cases, compound 2 may be commercially available (as in the case of 8-aminooctanoic acid [A=n-hexyl and Y=carboxylate] which is available from Aldrich Chemical Company). Intermediate 2 may be acylated or sulfonylated using an appropriate acyl or sulfonyl halide a to afford intermediate 3. Intermediate 3 is then arylated on nitrogen according to Buchwald's copper-catalyzed procedure (J. Am. Chem. Soc. 2002, 124, 7421-7428) or palladium-catalyzed procedure (Org. Lett. 2000, 2, 1101-1104), or a similar method, using a wide variety of substituted bromophenyl and other bromoaryl compounds b to give compound 4. The haloarenes b are either available commercially or may be made according to published literature procedures. For example, U.S. patent application Ser. No. 11/009,298, filed on Dec. 10, 2004 and U.S. Provisional Patent Application 60/742,779 filed on Dec. 6, 2005, both of which are expressly incorporated by reference herein, disclose methods of making a number of useful substituted bromophenyl compounds. These procedures may also be readily adapted to other bromoaryl compounds such as substituted bromothienyl, substituted bromofuryl, substituted bromopyridinyl, substituted bromonaphthyl, substituted bromobenzothienyl, and the like. Compound 4 may be the target compound, or may require deprotection(s) and/or functionalization (depending on the nature of B and Y) to arrive at the target compound.




In another hypothetical route to compound 4, aniline 5 is acylated or sulfonylated using an appropriate acyl or sulfonyl halide a to afford intermediate 6 (see Scheme 2). Anilines such as 5 are either available commercially or may be made from aryl halides according to published Buchwald-Hartwig amination reactions (for general reviews, see Jiang and Buchwald in Metal-Catalyzed Cross-Coupling Reactions, 2nd ed.: de Meijere, A., Diederich, F., Eds.; Wiley-VCH: Weinheim, Germany, 2004, p 699, and Hartwig in Handbook of Organopalladium Chemistry for Organic Synthesis; Negishi, E. I., Ed.; Wiley-Interscience: New York, 2002; Vol. 1, p 1051; specifically for primary aniline synthesis, see Shen and Hartwig: J. Am. Chem. Soc. 2006, 128, 10028-10029 and references therein). Intermediate 6 is then alkylated with electrophile 1 to afford compound 4.




In another hypothetical route to compound 4, the last two steps of scheme 1 are reversed (see Scheme 3). Thus alkylamine 2 is arylated on nitrogen using aryl or heteroaryl halide b according to Buchwald-Hartwig conditions (see above reviews) to provide alkylarylamine 7. Intermediate 7 is acylated or sulfonylated using an appropriate acyl or sulfonyl halide a to afford compound 4. It is envisioned that alternate routes involving rearranging the steps of these syntheses may be useful for arriving at compound 4.




In one specific hypothetical example (Scheme 4), alcohol 1a (see Shih, et al., J. Med. Chem. 1992, 35, 1109-1116 and Cragoe et al., U.S. Pat. No. 4,225,609, incorporated by reference herein) is converted in three steps to amine 2a. Acylation affords amide 3a which is then arylated using Buchwald's copper conditions to afford 4a. Deprotection followed by ester saponification yields desired product 9a.




In another specific hypothetical example, compound 8a may be oxidized to ketone 10a using one of the common methods known in the art such as Dess-Martin periodinane in DCM (Scheme 5). For example, this reaction may be carried out at room temperature. In another specific hypothetical example, compound 8a may be converted to the chloro or bromo derivatives 11a by first mesylating the hydroxyl group, then treating the mesylate with either tetrabutylammonium chloride or tetrabutylammonium bromide. This may be done using toluene or another appropriate solvent, and may be carried out at an elevated temperature such as 50° C. In another specific hypothetical example, compound 8a may be treated with DAST according to the methods known in the art to arrive at fluoro compound 12a. Other methods similar to these are known in the art, and may be employed. Also, this chemistry may also be used generally to modify compounds such as those within the scope of the structure depicted below.




Example 1
N-(4-(1-(4-methoxybenzyloxy)hexyl)phenyl)acetamide (103)
To a solution of acetamide 101 (100 mg, 1.7 mmol) and 1-bromo-4-(1-(4-methoxy)hexyl)benzene 102 (511 mg, 1.36 mmol) in acetonitrile (3.4 mL) were added potassium carbonate (374 mg, 2.72 mmol), copper(I)iodide (322 mg, 1.7 mmol) and N,N′-dimethylethylenediamine (0.36 ml, 3.4 mmol). The reaction was thoroughly degassed under vacuum, purged under an atmosphere of nitrogen and refluxed overnight. The reaction was allowed to cool to room temperature, diluted with EtOAc and filtered through celite. The filtrate was dried (MgSO4), filtered and concentrated in vacuo. The residue was purified by flash column chromatography (FCC, silica gel, 3:2 hex/EtOAc) to afford 372 mg (62%) of the aryl amide 103.
Example 2
Methyl 7-(N-(4-(1-(4-methoxybenzyloxy)hexyl)phenyl)acetamido)hept-5-ynoate (104)
Sodium bis(trimethylsilyl)amide (0.31 ml of a 1.0 M solution in THF, 0.31 mmol) was added to a solution of the aryl amide 103 (100 mg, 0.282 mmol) in THF (1.3 mL) at 0° C. After 15 min a solution of the methyl 7-iodohept-5-ynoate (90 mg, 0.338 mmol) in THF (0.3 mL) was added and the reaction was warmed room temperature. After stirring for 16 h the reaction was the quenched with saturated aqueous ammonium chloride and extracted with EtOAc. The organic portion was washed with brine, dried (MgSO4), filtered and the filtrate was concentrated in vacuo. Purification by FCC (silica gel, 3:2 hex/EtOAc) gave 35 mg (25%) of ester 104.
Example 3
Methyl 7-(N-(4-(1-hydroxyhexyl)phenyl)acetamido)hept-5-ynoate (105)
4,5-Dichloro-3,6-dioxo-1,4-cyclohexadiene-1,2-dicarbonitrile (19 mg, 0.081 mmol) was added to a solution of the MPM-ether 104 (35 mg, 0.071 mmol) in CHCl3 (1.6 mL) and H2O (0.1 mL) at 0° C. After stirring for 2 h at 0° C. the reaction was quenched with sodium bicarbonate and extracted with EtOAc. The organic portion was washed with saturated aqueous sodium hydrogen sulfate and brine, then dried (MgSO4), filtered and concentrated in vacuo. The residue was purified by flash column chromatography (silica gel, 3:2 hex/EtOAc) to yield 23 mg (87%) of the hydroxyl-ester 105.
Example 4
7-(N-(4-(1-hydroxyhexyl)phenyl)acetamido)hept-5-ynoic acid (106)
Lithium hydroxide (0.3 mL of a 0.5N solution in H2O, 0.14 mmol) was added to a solution of the ester 105 (23 mg, 0.062 mmol) in THF (0.3 mL) at 23° C. After stirring for 16 h the reaction was acidified with 10% citric acid and extracted with EtOAc. The organic portion was washed with brine twice and then dried (MgSO4), filtered and concentrated in vacuo. The residue was purified by FCC (silica gel, 9:1 CH2Cl2/MeOH) to afford 17 mg (77%) of the acid 106.




Example 5
Methyl 5-(3-iodopropyl)thiophene-2-carboxylate (108)
Iodine (187 mg, 0.74 mmol) was added to a solution of triphenylphosphine (194 mg, 0.74 mmol) and imidazole (49 mg, 0.74 mmol) in CH2Cl2 (1.5 mL) at 23° C. After 0.5 h a solution of methyl 5-(3-hydroxypropyl)thiophene-2-carboxylate 7 (123 mg, 0.62 mmol) in CH2Cl2 (0.5 mL) was added. After stirring for 2 h the reaction was concentrated in vacuo and the residue was purified by FCC (silica gel, 7:3 hex/EtOAc) to provide 170 mg (89%) of the iodide 108.
Example 6
Methyl 5-(-3-(N-(4-(1-(4-methoxybenzyloxy)hexyl)phenyl)acetamido)propyl)thiophene-2-carboxylate (109)
Sodium hydride (21 mg, 0.86 mmol) was added to a solution of the arylamide 102 (203 mg, 0.57 mmol) in THF (1 mL) at 0° C. After 0.5 h a solution of the iodide 108 (355 mg, 1.14 mmol) in THF (0.5 mL) was added and the reaction was allowed to warm to room temperature on its own accord. Stirring was continued an additional 16 h at 23° C. and then the reaction was quenched with saturated aqueous ammonium chloride. The mixture was extracted with EtOAc and the organic portion was washed with brine, dried (MgSO4), filtered then concentrated in vacuo. Purification of the residue by FCC (silica gel, 3:2 hex/EtOAc) provided 61 mg (20%) of the above titled compound 109.
Example 7
Methyl 5-(−3-(N-(4-(1-hydroxyhexyl)phenyl)acetamido)propyl)thiophene-2-carboxylate (110)
43 mg (91%) of hydroxyl-ester 110 was prepared in accordance with the procedures described in Example 3.
Example 8
5-(-3-(N-(4-(1-hydroxyhexyl)phenyl)acetamido)propyl)thiophene-2-carboxylic acid (111)
29 mg (70%) of carboxylic acid 111 was prepared in accordance with the procedures described in Example 4.
Example 9
Methyl 5-(3-iodopropyl)thiophene-2-carboxylate (13)
Methyl 5-(4-hydroxybutyl)thiophene-2-carboxylate 112 (1.07 g, 4.99 mmol) was converted to 1.61 g (99%) iodide 113 according to the procedures described in Example 5.
Example 10
Methyl 5-(-3-(N-(4-(1-(4-methoxybenzyloxy)hexyl)phenyl)acetamido)butyl)thiophene-2-carboxylate (14)
92 mg (29%) of arylamide 114 was prepared in accordance with the procedures described in Example 6.
Example 11
Methyl 5-(-3-(N-(4-(1-hydroxyhexyl)phenyl)acetamido)butyl)thiophene-2-carboxylate (115)
57 mg (73%) of hydroxyl-ester 115 was prepared in accordance with the procedures described in Example 3.
Example 12
5-(-3-(N-(4-(1-hydroxyhexyl)phenyl)acetamido)butyl)thiophene-2-carboxylic acid (116)
36 mg (65%) of carboxylic acid 116 was prepared in accordance with the procedures described in Example 4.
From the methods disclosed herein, a person of ordinary skill in the art can prepare the compounds disclosed herein by using the disclosed methods, by adaptations readily ascertainable by those in the art from the disclosure herein, and/or by the knowledge generally available in the art.
A person of ordinary skill in the art understands the meaning of the stereochemistry associated with the hatched wedge/solid wedge structural features. For example, an introductory organic chemistry textbook (Francis A. Carey, Organic Chemistry, New York: McGraw-Hill Book Company 1987, p. 63) states “a wedge indicates a bond coming from the plane of the paper toward the viewer” and the hatched wedge, indicated as a “dashed line”, “represents a bond receding from the viewer.”
Treatment of inflammatory bowel disease may be accomplished by the administration of the compounds described herein to the suffering mammal. Inflammatory bowel disease describes a variety of diseases characterized by inflammation of the bowels including, but not limited to, ulcerative colitis and Crohn's disease. Treatment may be accomplished by oral administration, by suppository, or parenteral administration, or some other suitable method.
While not intending to limit the scope of the invention in any way, delivery of the compounds disclosed herein to the colon via oral dosage forms may be accomplished by any of a number of methods known in the art. For example, reviews by Chourasia and Jain in J Pharm Pharmaceut Sci 6 (1): 33-66, 2003 and Shareef et. al (AAPS PharmSci 2003; 5 (2) Article 17) describe a number of useful methods. While not intending to limit the scope of the invention in any way these methods include 1) administration of a prodrug, including an azo or a carbohydrate based prodrug; 2) coating the drug with, or encapsulating or impregnating the drug into a polymer designed for delivery to the colon, 3) time released delivery of the drug, 4) use of a bioadhesive system; and the like.
While not intending to be bound in any way by theory, it is believed that intestinal microflora are capable of reductive cleavage of an azo bond leaving the two nitrogen atoms as amine functional groups. While not intending to limit the scope of the invention in any way, the azo prodrug approach has been used to deliver to 5-aminosalicylic acid to the colons of humans in clinical trials for the treatment of inflammatory bowel disease. It is also believed that bacteria of the lower GI also have enzymes which can digest glycosides, glucuronides, cyclodextrins, dextrans, and other carbohydrates, and ester prodrugs formed from these carbohydrates have been shown to deliver the parent active drugs selectively to the colon. For example, in vivo and in vitro studies on rats and guinea pigs with prodrugs of dexamethasone, prednisolone, hydrocortisone, and fludrocortisone, suggest that glycoside conjugates may be useful for the delivery of steroids to the human colon. Other in vivo studies have suggested that glucouronide, cyclodextrin, and dextran prodrugs of steroids or non-steroidal anti-inflammatory drugs are useful for delivery of these drugs to the lower GI tract. An amide of salicylic acid and glutamic acid has been shown to be useful for the delivery of salicylic acid to the colon of rabbit and dog.
While not intending to limit the scope of the invention in any way, carbohydrate polymers such as amylase, arabinogalactan, chitosan, chondroiton sulfate, dextran, guar gum, pectin, xylin, and the like, or azo-group containing polymers can be used to coat a drug compound, or a drug may be impregnated or encapsulated in the polymer. It is believed that after oral administration, the polymers remain stable in the upper GI tract, but are digested by the microflora of the lower GI thus releasing the drug for treatment.
Polymers which are sensitive to pH may also be used since the colon has a higher pH than the upper GI tract. Such polymers are commercially available. For example, Rohm Pharmaceuticals, Darmstadt, Germany, commercially provides pH dependent methacrylate based polymers and copolymers which have varying solubilities over different pH ranges based upon the number of free carboxylate groups in the polymer under the tradename Eudragit®. Several Eudragit® dosage forms are currently used to deliver salsalazine for the treatment of ulcerative colitis and Crohn's disease. Time release systems, bioadhesive systems, and other delivery systems have also been studied.
In Vitro Testing
U.S. patent application Ser. No. 11/553,143, filed on Oct. 26, 2006, incorporated by reference herein, describes the methods used to obtain the in vitro data in the table below.
















EP2 data

EP4 data















flipr
cAMP

flipr

Other Receptors (EC50 in nM)


















Structure
EC50
EC50
Ki
EC50
KI
hFP
hEP1
hEP3A
hTP
hIP
hDP









NT
NT
NA
NT
NA
NA
NA
NA
8529
NA
NA


 






NT
NT
>10000
NT
NA
NA
NA
NA
NA
NA
4763


 






NT
NT
>10000
NT
>10000
NA
NA
NA
NA
NA
NA









The foregoing description details specific methods and compositions that can be employed to practice the present invention, and represents the best mode contemplated. However, it is apparent for one of ordinary skill in the art that further compounds with the desired pharmacological properties can be prepared in an analogous manner, and that the disclosed compounds can also be obtained from different starting compounds via different chemical reactions. Similarly, different pharmaceutical compositions may be prepared and used with substantially the same result. Thus, however detailed the foregoing may appear in text, it should not be construed as limiting the overall scope hereof; rather, the ambit of the present invention is to be governed only by the lawful construction of the claims.

## Claims

1. A compound of the formula




or a pharmaceutically acceptable salt thereof;
wherein Y is an organic acid functional group, or an amide or ester thereof consisting of up to 14 carbon atoms; or Y is hydroxymethyl or an ether thereof consisting of up to 14 carbon atoms; or Y is a tetrazolyl functional group;
A is —(CH2)6—, cis —CH2CH═CH—(CH2)3—, or —CH2C≡C—(CH2)3—, wherein 1 or 2 carbon atoms may be replaced by S or O; or A is —(CH2)m—Ar—(CH2)o— wherein Ar is interarylene or heterointerarylene, the sum of m and o is 1, 2, 3, or 4, and wherein 1 —CH2— may be replaced by S or O, and 1 —CH2—CH2— may be replaced by —CH═CH— or —C≡C—;
E is SO2 or CO;
G is C1-4 alkyl, phenyl, furan or thiophene; and
R is hydrogen or C1-10 hydrocarbyl.

2. A compound of the formula




or a pharmaceutically acceptable salt thereof;
wherein A is —(CH2)6—, cis —CH2CH═CH—(CH2)3—, or —CH2C≡C—(CH2)3—, wherein 1 or 2 carbon atoms may be replaced by S or O; or A is —(CH2)m—Ar—(CH2)o— wherein Ar is interphenylene or monocyclic heterointerarylene, the sum of m and o is 1, 2, 3, or 4, and wherein one CH2 may be replaced by S or O;
E is SO2 or CO;
G is C1-4 alkyl, phenyl, furan or thiophene; and
R is hydrogen or C1-10 hydrocarbyl.

3. The compound according to claim 1 wherein Y is selected from CO2R2, CON(R2)2, CON(OR2)R2, CON(CH2CH2OH)2, CONH(CH2CH2OH), CH2OH, P(O)(OH)2, CONHSO2R2, SO2N(R2)2, SO2NHR2,




wherein R2 is independently H, C1-C6 alkyl, unsubstituted phenyl, or unsubstituted biphenyl.

4. The compound of claim 1 wherein G is methyl.

5. The compound according to any one of claim 1 wherein A is selected from:

6. The compound according to claim 5 wherein A is 5-(3-propyl)thiophen-2-yl.

7. The compound of claim 1 wherein E is CO.

8. A method for reducing intraocular pressure comprising administering to a subject in need thereof a therapeutically effective amount of a compound according to claim 1.