# Patent

## Title
Cyclosporin alkyne analogues and their pharmaceutical uses

## Abstract

The compounds of the present invention are represented by the chemical structure found in Formula I:




or a pharmaceutically acceptable salt thereof, with X, R0, R1, and R2 defined herein.

## Background
This application claims the benefit of U.S. Provisional Patent Application Ser. No. 60/614,283, filed Sep. 29, 2004, which is hereby incorporated by reference in its entirety.


FIELD OF THE INVENTION
The present invention discloses novel cyclosporin alkyne analogues and their utilities as immunosuppressive agents and as pharmaceutical agents for treatment of other diseases. Methods for preparation of such analogues are also disclosed.
BACKGROUND OF THE INVENTION
Cyclosporin A (CsA), a neutral cyclic undecapeptide isolated from the fungus Tolypocladium inflatum and currently marketed as Neoral® and Sandimmune® (Novartis, Basel, Switzerland), has been widely used for the prevention of organ transplant rejection. Cyclosporin A exerts its immunosuppressive effect at the molecular level by binding to the cyclophilin peptidyprolyl cis/trans isomerase. The resulting complex of cyclosporin A and cyclophilin binds to calcineurin, a Ca2+/calmodulin-dependent phosphatase, and inhibits its phosphatase activity. Calcineurin regulates the translocation of the transcription factor nuclear factor of activated T-cell (NFAT) and the subsequent expression of early genes necessary for T-cell proliferation. Inhibition of the phosphatase activity of calcineurin by the cyclosporin A-cyclophilin complex prevents NFAT nuclear localization and suppresses the expression of genes like IL-2, ultimately leading to immunosuppression (Matsuda et al., “Mechanisms of Action of Cyclosporin”, Immunopharmacology, 47:119-125 (2000)).
Cyclosporin A also has potential therapeutic application in the treatment of autoimmune diseases such as rheumatoid arthritis, Crohn's disease, psoriasis, and chronic inflammatory diseases, such as asthma. Unfortunately, clinical utility for these indications has not been realized because of the side effects such as nephrotoxicity, hypertension, hepatotoxicity, anaemia, and gastrointestinal intolerance that occur with clinically effective doses of cyclosporin A. The toxicity associated with cyclosporin A is believed by many experts working in the immunosuppression therapeutic area to be mechanism based (Lazarova et al., “Cyclosporin A Analogues: Recent Advances”, Expert Opin. Ther. Patents, 13:1327-1332 (2003)). Indeed, the goal of discovering novel cyclosporin analogues with improved therapeutic index has yet to be achieved despite the significant efforts in this drug discovery area over the last three decades (U.S. Pat. No. 5,525,590 to Bollinger et al.; U.S. Pat. No. 5,643,870 to Boelsterli et al.; U.S. Pat. No. 5,639,852 to Rich et al.; U.S. Pat. No. 5,236,899 to Durette; U.S. Pat. No. 5,122,511 to Patchett et al.; U.S. Pat. No. 4,914,188 to Dumont et al.; U.S. Pat. No. 4,771,122 to Seebach; U.S. Pat. No. 4,764,503 to Wenger; U.S. Pat. No. 4,396,542 to Wenger; U.S. Pat. No. 4,210,581 to Ruegger et al.).
More recent efforts to find novel cyclosporin analogues with potent immunosuppressive activity and decreased toxicity are underway and have led to compounds such as ISATX247. Preclinical observations indicate that ISATX247 has the potential to be significantly more potent and less toxic than other immunosuppressants in its class already available on the market for the prevention of transplant rejection. ISATX247 is in phase II clinical trials for the prevention of organ rejection after transplantation and for the treatment of psoriasis (Abel et al., “ISATX247: A Novel Calcineurin Inhibitor,” J. Heart Lung Transplant, 20:161 (2001); Aspeslet et al., “ISATX247: A Novel Calcineurin Inhibitor,” Transplantation Proceedings, 33:1048-1051 (2001); U.S. Pat. Nos. 6,605,593 and 6,613,739 to Naicker et al.).
A “soft” drug approach (Lazarova et al., “Synthesis and Biological Evaluation of Cyclosporin A Analogues: Potential Soft Drugs for the Treatment of Autoimmune Diseases,” J. Med. Chem., 46:674-676 (2003)) has also recently been described that seeks to minimize the toxicity of immunosuppressive cyclosporin A derivatives used for the treatment of autoimmune diseases (International Patent Publication No. WO 03/033010 to Or et al.) and respiratory diseases, such as asthma (International Patent Publication No. WO 02/069902 to Or et al.).
There is still a large need for novel cyclosporin analogues with improved therapeutic index.
The present invention is directed to achieving these objectives.
SUMMARY OF THE INVENTION
The compounds of the present invention are represented by Formula I, as shown below:




where:

    X is OH or OAc;
    R0 is H, CH2OH, or CH2OR3;
    R1 is hydrogen, deuterium, or methyl;
    R2 is selected from the group consisting of:
    
        hydrogen;
        halogen;
        C1-C6 saturated or unsaturated, straight or branched carbon chain;
        C1-C6 saturated or unsaturated, straight or branched carbon chain containing a substitution or substitutions selected from the group consisting of deuterium, halogen, nitrogen, sulfur, and silicon;
        C1-C6 saturated or unsaturated, straight or branched carbon chain containing a function group or function groups selected from the group consisting of alcohol, ether, aldehyde, ketone, carboxylic acid, ester, and amide;
        C1-C6 saturated or unsaturated, straight or branched carbon chain containing a function group of oxime or hydrazone;
        C1-C6 saturated or unsaturated, straight or branched carbon chain containing an aryl or a heteroaryl group;
        C3-C6 substituted and unsubstituted cycloalkyl;
        substituted and unsubstituted aryl; and
        substituted and unsubstituted heteroaryl; and
    
    
    R3 is selected from the group consisting of:
    
        alkanoyl,
        alkenoyl,
        alkynoyl,
        aryloyl,
        arylalkanoyl,
        alkylaminocarbonyl,
        arylaminocarbonyl,
        arylalkylaminocarbonyl,
        alkyloxycarbonyl,
        aryloxycarbonyl, and
        arylalkyloxycarbonyl,

wherein the compound is a cis geometric isomer, a trans geometric isomer, or a mixture of the cis and the trans geometric isomers or a pharmaceutically acceptable salt thereof.

    
    


The present invention discloses chemically modified cyclosporin analogues containing a carbon-carbon triple bond on the side chain of the position one amino acid and optionally a substitution on the position three amino acid of cyclosporin A. In particular, the present invention discloses novel cyclosporin analogues containing a conjugated system of a carbon-carbon triple bond and a carbon-carbon double bond on the side chain of the position one amino acid of cyclosporin A.
The present invention provides novel cyclosporin analogues which are effective as immunosuppressive agents. Some compounds of the present invention possess enhanced immunosuppressive activity over cyclosporin A. These compounds also possess utility in the treatment of ocular allergy and dry eye, as well as autoimmune and chronic inflammatory diseases, such as asthma, rheumatoid arthritis, multiple sclerosis, psoriasis, and ulcerative colitis.



BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 depicts the results from a concanavalin A (ConA)-stimulated murine splenocyte assay, where the novel cyclosporin analogue compounds of the present invention (disclosed in Examples 5 and 33) are shown to possess enhanced or similar potency in immunosuppression, compared to cyclosporin A and ISATX247.



DETAILED DESCRIPTION OF THE INVENTION
The present invention provides novel cyclosporin analogues represented by Formula I, as shown below:




where:

    X is OH or OAc;
    R0 is H. CH2OH, or CH2OR3;
    R1 is hydrogen, deuterium, or methyl;
    R2 is selected from the group consisting of:
    
        hydrogen;
        halogen;
        C1-C6 saturated or unsaturated, straight or branched carbon chain;
        C1-C6 saturated or unsaturated, straight or branched carbon chain containing a substitution or substitutions selected from the group consisting of deuterium, halogen, nitrogen, sulfur, and silicon;
        C1-C6 saturated or unsaturated, straight or branched carbon chain containing a function group or function groups selected from the group consisting of alcohol, ether, aldehyde, ketone, carboxylic acid, ester, and amide;
        C1-C6 saturated or unsaturated, straight or branched carbon chain containing a function group of oxime or hydrazone;
        C1-C6 saturated or unsaturated, straight or branched carbon chain containing an aryl or a heteroaryl group;
        C3-C6 substituted and unsubstituted cycloalkyl;
        substituted and unsubstituted aryl; and
        substituted and unsubstituted heteroaryl; and
    
    
    R3 is selected from the group consisting of:
    
        alkanoyl,
        alkenoyl,
        alkynoyl,
        aryloyl,
        arylalkanoyl,
        alkylaminocarbonyl,
        arylaminocarbonyl,
        arylalkylaminocarbonyl,
        alkyloxycarbonyl,
        aryloxycarbonyl, and
        arylalkyloxycarbonyl,

wherein the compound is a cis geometric isomer, a trans geometric isomer, or a mixture of the cis and the trans geometric isomers or a pharmaceutically acceptable salt thereof.

    
    


The wavy bond in the structure of Formula I indicates the carbon-carbon double bond is the cis geometric isomer, the trans geometric isomer, or a mixture of both the cis and the trans geometric isomers.
One embodiment of the present invention is the above compound of Formula I, where: X is OH or OAc; R0 is H, CH2OH, or CH2OAc; R1 is H or D; and R2 is H.
Another embodiment of the present invention is the above compound of Formula I, where: X is OH or OAc; R0 is H, CH2OH, or CH2OAc; R1 is H or D; and R2 is CH3, CD3, CH2CH3, or CH2CH2CH3.
Another embodiment of the present invention is the above compound of Formula I, where: X is OH or OAc; R0 is H, CH2OH, or CH2OAc; R1 is H or D; and R2 is —CH═CH2, —CH═CHCH3, —C≡CH, or —C≡C—CH3.
Another embodiment of the present invention is the above compound of Formula I, where: X is OH or OAc; R0 is H, CH2OH, or CH2OAc; R1 is H or D; and R2 is F, Cl, Br, or I.
Another embodiment of the present invention is the above compound of Formula I, where: X is OH or OAc; R0 is H, CH2OH, or CH2OAc; R1 is H or D; and R2 is cyclopropyl.
Another embodiment of the present invention is the above compound of Formula I, where: X is OH or OAc; R0 is H, CH2OH, or CH2OAc; R1 is H or D; and R2 is CH2OH, CH(OH)CH3, CH2OCH3, CH2OCH2CH3, CHO, and C(═O)CH3.
Another embodiment of the present invention is the above compound of Formula I, where: X is OH or OAc; R0 is H, CH2OH, or CH2OAc; R1 is H or D; and R2 is CH═N—OCH3, CH═N—OCH2CH3, CH═N—NHCH3, or CH═N—N(CH3)2.
Another embodiment of the present invention is the above compound of Formula I, where: X is OH or OAc; R0 is H; R1 is H; and R2 is H, CH3, Si(CH3)3.
Other embodiments of the present invention include novel cyclosporine analogue compounds represented by Formula Ia, as shown below:




where:

    X=OH or OAc;
    R0=H;
    R1=H or D; and
    R2=H, CH3, CD3, n-propyl, n-butyl, —CH2CH2CH2Cl, Si(CH3)3, Ph, p-ClC6H4—, 2-pyridinyl, 3-thiophenyl, cyclopropyl, cyclohexyl, —CH2OH, —CH(OH)CH3, —CH2CH2OH, —CH(OH)CH2CH3, —CHO, —C(═O)CH3, —CH═CH2, —CH═CHCH3, —C(CH3)═CH2, —CH═CHI, Br, I, —CH2OCH3, —CH2OPh, —CH2OCH2CH═CH2, —CH2OCH2C≡CH, —CH2SCH2CH3, —CH2OCH2CO2But, —CH2OCH2CO2H, —CO2H, —CH2CH2CO2H, —CH═N—OCH3, or —CH═N—N(CH3)2;

or where:

    X=OH or OAc;
    R0=CH2OH or CH2OAc;
    R1=H or D; and
    R2=H, CH3, CD3, n-propyl, Si(CH3)3, Br, —CH═CH2, 3-thiophenyl, —CH2OH, —CH(OH)CH3, —CH2OCH3, —CH2SCH2CH3, —CH2OPh, —CH2OCH2C≡CH, cyclopropyl, or cyclohexyl.


Other embodiments of the present invention include novel cyclosporine analogue compounds represented by Formula Ib, as shown below:




where:

    X=OH or OAc;
    R0=H;
    R1=H or D; and
    R2=H, CH3, Si(CH3)3.


In particular, the present invention relates to novel cyclosporin analogues containing a carbon-carbon triple bond on the side chain of the position one amino acid and optionally a substitution on the position three amino acid of cyclosporin A. More particularly, the present invention relates to novel cyclosporin analogues containing a conjugated system, in which a function group of a carbon-carbon triple bond conjugating with a carbon-carbon double bond is incorporated.
A carbon-carbon triple bond exists in many natural products (Gung et al., “Total synthesis of (S)-(−)-(E)-15,16-Dihydrominquartynoic Acid: A Highly Potent Anticancer Agent,” J. Org. Chem., 69:3488-3492 (2004); Ito et al., “Cytotoxic Polyacetylenes from the Twigs of Ochanostachys amentacea,” J. Nat. Prod., 64:246-248 (2001), which are hereby incorporated by reference in their entirety). It is well known to use alkynes as pharmaceutical agents. However, only one cyclosporin alkyne, in which a carbon-carbon triple bond replaces the carbon-carbon double bond on the side chain of the position one amino acid of cyclosporin A, is known in the literature. Unfortunately, this modification significantly reduces the immunosuppressive activity of cyclosporin A, where this known cyclosporin alkyne shows only 10% relative immunosuppressive activity compared to cyclosporin A (Rich et al., “Synthesis, Conformation, and Immunosuppressive Activities of Three Analogues of Cyclosporin A Modified in the 1-Position,” J. Med. Chem., 33:999-1009 (1990), which is hereby incorporated by reference in its entirety). In contrast, the novel cyclosporin alkyne analogues of the present invention, which contains a conjugated system of a carbon-carbon triple bond and a carbon-carbon double bond, possess enhanced immunosuppressive activity over cyclosporin A.
The present invention also discloses methods for preparing the compounds represented by Formula I.
The starting material for the preparation of compounds of the present invention is cyclosporin A. The structure of cyclosporin A, a cycloundecapeptide, and the position numbering for each amino acid in the ring is shown below:




Cyclosporin A can also be represented by Formula IIa, as shown below:




The novel cyclosporin analogues of the present invention are derived from cyclosporin A or cyclosporin diol (Formula IIb), a key intermediate prepared by modification at the position three amino acid of cyclosporin A. As shown in Scheme 1, the cyclosporin diol intermediate can be prepared by deprotonation of cyclosporin A with lithium diisopropylamide (LDA) followed by treatment with formaldehyde (Seebach et al, “Modification of Cyclosporin A: Generation of an Enolate at the Sarcosine Residue and Reaction with Electrophiles,” Helv. Chim. Acta, 76:1564-1590 (1993), which is hereby incorporated by reference in its entirety).




According to one embodiment of the present invention, novel cyclosporin alkyne analogues can be prepared by employing palladium-mediated couplings (such as Sonogashira and Negishi coupling) as a key step, which is outlined in Scheme 2. Acetylation of cyclosporin A (Formula Ia) or cyclosporin diol intermediate of Formula IIb with acetic anhydride, followed by oxidative cleavage of the double bond with ozone, generates the cyclosporin aldehyde of Formula III smoothly. Treatment of the cyclosporin aldehyde with iodoform-CrCl2 complex (Takai et al, “Simple and Selective Method for RCHO→(E)-RCH═CHX Conversion by Means of a CHX3—CrCl2 System,” J. Am. Chem. Soc., 108:7408-7410 (1986), which is hereby incorporated by reference in its entirety) affords cyclosporin vinyl iodides of Formula IVa in good to excellent yield (50-80%) in exclusively the trans-configuration. Palladium-catalyzed coupling (such as Sonogashira coupling and Negishi coupling) of the cyclosporin vinyl iodide of Formula IVa with various alkynes or alkynylzinc reagents provides novel cyclosporin alkynes of Formula Ia in the trans-configuration in high yield. The acetyl protecting group in the cyclosporin alkyne of Formula Ia can be removed by treatment with potassium carbonate in methanol (see Scheme 2).




Utilizing the same strategy, the cis-isomer of cyclosporin alkyne analogues (Formula Ib) can be prepared using the cis-isomer of cyclosporin vinyl iodide (Formula IVb), as shown in Scheme 3. By application of phosphorous ylide chemistry (Wittig reaction), the cyclosporin aldehyde of Formula III can be converted to the cyclosporin vinyl iodide of Formula IVb exclusively as the cis-isomer. Typically, the phosphorous ylide can be generated by treatment of the corresponding phosphonium salt with a strong base, such as n-butyllithium or sodium bis(trimethylsilyl)amide. Palladium catalyzed coupling (such as Sonogashira coupling and Negishi coupling) of the cyclosporin vinyl iodide of Formula IVb with various alkynes or alkynylzinc reagents provides the novel cyclosporin alkyne of Formula Ib in the cis-configuration. The deacetylation is conducted under the same conditions as described above in Scheme 2.




According to another embodiment of the present invention, cyclosporin alkyne analogues can be prepared by the application of phosphorus chemistry (such as Wittig reaction), as shown in Scheme 4. This chemistry converts the cyclosporin aldehyde of Formula III to a mixture of cis and trans geometric isomers of cyclosporin alkyne analogues of Formula I, which is difficult to be separated. Typically, the phosphorous ylide species under Wittig or Homer-Emmons conditions are generated by treatment of various phosphonium salts or phosphonates with a strong base, such as n-butyllithium or sodium bis(trimethylsilyl)amide. The deacetylation is conducted under the same conditions as described in Scheme 2.




The compounds disclosed in the present invention are particularly useful as immunosuppressive agent. Administration of these compounds suppresses the immune response in organ transplant patients and, thus, prevents allograft rejection. The compounds of the present invention possess enhanced immunosuppressive activity over cyclosporin A. For example, as shown in FIG. 1, the novel cyclosporin alkyne analogue compound disclosed in Example 5 demonstrates immunosuppressive activity up to two times more potent (as determined by IC50) over ISATX247 and up to three or four times more active, compared to cyclosporin A, while the cyclosporin alkyne analogue compound disclosed in Example 33 is up to two times more active over cyclosporin A and equipotent to ISATX247 in the concanavalin A (ConA) stimulated murine splenocyte assay. Table 1 shows the immunosuppressive activities of several novel cyclosporin alkyne analogue compounds disclosed in the present application. (The third column in Table 1 contains Cyclosporin A positive control values included for comparison.)







TABLE 1







Immunosuppressive Activity of Novel Cyclosporin Alkyne Analogue


Compounds of the Present Invention











Example where the





Novel Cyclosporin

IC50



Alkyne Analogue
IC50 
(ng/mL)



Compound is Disclosed
(ng/mL)
of CsA















Example 5
6
20



Example 6
6
23



Example 13
1
15



Example 15
8
17



Example 27
6
9



Example 28
7
5



Example 33
9
20



Example 71
4
15



Example 73
6
15



Example 79
11
15



Example 83
10
15



Example 89
15
17










The compounds disclosed in the present invention also possess utility in the treatment of autoimmune and chronic inflammatory diseases like asthma, rheumatoid arthritis, multiple sclerosis, psoriasis, and ulcerative colitis, to name only a few.
In addition, the compounds disclosed in the present invention are useful for the treatment of ocular allergy and dry eye. Allergan is currently marketing a topical formulation of cyclosporin A called RestasisTM (cyclosporin ophthalmic emulsion) for the treatment of keratoconjunctivitis sicca or chronic dry eye syndrome in patients whose tear production is presumed to be suppressed due to ocular inflammation. While the exact mechanism of RestasisTM is unknown, it is thought to act as an immunomodulator with anti-inflammatory effects (“Annual Update 2003: Ophthalmic Drugs” Drugs of the Future, 28(3): 287-307 (2003); Clark et al., “Ophthalmic Drug Discovery,” Nature Reviews in Drug Discovery, 2:448-459 (2003), which are hereby incorporated by reference in their entirety).
For treatment of the above mentioned diseases, therapeutically effective doses of the compounds of the present invention may be administered orally, topically, parenterally, by inhalation spray, or rectally in dosage unit formulations containing conventional non-toxic pharmaceutically acceptable carriers, adjuvants, and vehicles. The term parenteral, as used herein, includes subcutaneous injections, intravenous, intramuscular, intrasternal injection, or infusion techniques.
The pharmaceutical compositions containing the active ingredient may be in the form suitable for oral use, for example, as tablets, troches, lozenges, aqueous or oily suspensions, dispersible powders or granules, emulsions, hard or soft capsules, or syrups or elixirs. The pharmaceutical compositions of the present invention contain the active ingredient formulated with one or more pharmaceutically acceptable carriers. As used herein, the term “pharmaceutical acceptable carrier” means a non-toxic, inert solid, semi-solid or liquid filler, diluent, encapsulating material, or formulation auxiliary of any type. Some examples of pharmaceutically acceptable carriers are sugars such as lactose, glucose, and sucrose; starches such as corn starch or potato starch; cellulose and its derivatives such as sodium carboxymethyl cellulose, ethyl cellulose, and cellulose acetate; powdered tragacanth; malt; gelatin; talc; excipients such as cocoa butter and suppository waxes; oils such as peanut oil, cottonseed oil, safflower oil, sesame oil, olive oil, corn oil, and soybean oil; glycols such as propylene glycol; esters such as ethyl oleate and ethyl laurate; agar; buffering agents such as magnesium hydroxide and aluminum hydroxide; alginic acid; pyrogen-free water; isotonic saline; Ringer's solution; ethyl alcohol; phosphate buffer solutions; non-toxic, compatible lubricants such as sodium lauryl sulfate and magnesium stearate; as well as coloring agents, releasing agents, sweetening, and flavoring and perfuming agents. Preservatives and antioxidants, such as ethyl or n-propyl p-hydroxybenzoate, can also be included in the pharmaceutical compositions.
Dosage forms for topical or transdermal administration of compounds disclosed in the present invention include ointments, pastes, creams, lotions, gels, plasters, cataplasms, powders, solutions, sprays, inhalants, or patches. The active component is admixed under sterile conditions with a pharmaceutically acceptable carrier and any needed preservatives or buffers, as may be required. The ointments, pastes, creams and gels may contain, in addition to an active compound of the present invention, excipients such as animal and vegetable fats, oils, waxes, paraffins, starch, tragacanth, cellulose derivatives, polyethylene glycols, silicones, bentonites, silicic acid, talc and zinc oxide, or mixtures thereof.
For nasal administration, the compounds disclosed in the present invention can be administered, as suitable, in liquid or powdered form from a nasal applicator. Forms suitable for ophthalmic use will include lotions, tinctures, gels, ointment and ophthalmic inserts, as known in the art. For rectal administration (topical therapy of the colon), the compounds of the present invention may be administered in suppository or enema form, in solution in particular, for example in vegetable oil or in an oily system for use as a retention enema.
Compounds disclosed in the present invention may be delivered to the lungs by the inhaled route either in nebulizer form or as a dry powder. The advantage of the inhaled route, over the systemic route, in the treatment of asthma and other diseases of airflow obstruction and/or chronic sinusitis, is that patients are exposed to very small quantities of the drug and the compound is delivered directly to the site of action.
Dosages of the compounds of the present invention employed for the treatment of the maladies identified in the present invention will vary depending on the site of treatment, the particular condition to be treated, the severity of the condition, the subject to be treated (who may vary in body weight, age, general health, sex, and other factors) as well as the effect desired.
Dosage levels ranging from about 0.05 mg to about 50 mg per kilogram of body weight per day are useful for the treatment of the conditions or diseases identified in the present invention. This means the amount of the compound disclosed in the present invention that is administered will range from 2.5 mg to about 2.5 gm per patient per day.
The amount of active ingredient that may be combined with the pharmaceutical carrier materials to produce a single dosage form will vary depending upon the host treated and the particular mode of administration. For example, a formulation intended for the oral administration of humans may contain from 2.5 mg to 2.5 gm of active compound of the present invention compounded with an appropriate and convenient amount of carrier material which may vary from about 5 to 95 percent of the total composition. Dosage unit forms will generally contain between from about 5 mg to about 500 mg of active compound of the present invention. Dosage for topical preparation will, in general be less (one tenth to one hundredth) of the dose required for an oral preparation.
EXAMPLES
Example 1
Preparation of Cyclosporin Acetate
A solution of cyclosporin A (5.0 g, 4.16 mmol), acetic anhydride (7.80 mL, 83.2 mmol), and DMAP (760 mg, 6.2 mmol) in methylene chloride (40 mL) was stirred overnight at room temperature under N2 atmosphere. Saturated sodium bicarbonate solution (200 mL) was added to the solution and stirred for an additional 2 h. The mixture was extracted with ether, washed with 1 N HCl, neutralized with saturated sodium bicarbonate solution, washed with brine, dried over sodium sulfate, and concentrated in vacuo to afford cyclosporin acetate (4.92 g, 95%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 8.57 (d, J=9.6 Hz, 1H), 8.04 (d, J=6.9 Hz, 1H), 7.51 (d, J=9.4 Hz, 1H), 7.47 (d, J=7.8 Hz, 1H), 5.67 (dd, J=11.0, 4.0 Hz, 1H), 5.60-5.44 (m, 2H), 5.39 (dd, J=11.7, 3.7 Hz, 1H), 5.32-5.13 (m, 4H), 5.06-4.93 (m, 2H), 4.85 (t, J=7.2 Hz, 1H), 4.77 (t, J=9.6 Hz, 1H), 4.65 (d, J=13.7 Hz, 1H), 4.41 (t, J=7.0 Hz, 1H), 3.46 (s, 3H), 3.26 (s, 3H), 3.24 (s, 3H), −3.21 (s, 3H), 3.10 (s, 3H), 2.68 (s, 3H), 2.66 (s, 3H), 2.50-2.35 (m, 1H), 2.25-1.80 (m, 6H), 2.08 (s, 3H), 2.01 (s, 3H), 1.75-1.55 (m, 6H), 1.45-0.75 (m, 55H); ESI MS m/z 1245 [C64H113N11O13+H]+.
Example 2
Preration of Acetyl Cyclosporin Aldehyde
Ozone was bubbled into a solution of cyclosporin acetate from Example 1 (3.0 g, 2.4 mmol) in methylene chloride (70 mL) at −78° C. until a blue color was developed. The mixture was degassed with nitrogen for a few min and dimethylsulfide (3 mL) was added at −78° C. The reaction mixture was allowed to warm to room temperature and stirred for 3 h. The reaction mixture was concentrated in vacuo and the residue was dissolved in ethyl acetate (300 mL), washed with water (2×70 mL) and brine (70 mL), dried over sodium sulfate, filtered, and concentrated in vacuo to afford acetyl cyclosporin aldehyde (2.79 g, 94%) as a white solid. The crude was carried to the next step without further purification: 1H NMR (300 MHz, CDCl3) δ 9.60 (d, J=3.5 Hz, 1H), 8.55 (d, J=9.7 Hz, 1H), 7.96 (d, J=6.8 Hz, 1H), 7.52 (d, J=7.7 Hz, 1H), 7.46 (d, J=9.0 Hz, 1H), 5.67 (dd, J=11.0, 3.8 Hz, 1H), 5.60-5.45 (m, 2H), 5.32 (dd, J=12.1, 3.3 Hz, 1H), 5.24-5.10 (m, 2H), 5.08-4.90 (m, 2H), 4.84 (t, J=7.1 Hz, 1H), 4.73 (t, J=9.6 Hz, 1H), 4.64 (d, J=13.8 Hz, 1H), 4.41 (t, J=7.0 Hz, 1H), 3.46 (s, 3H), 3.29 (s, 6H), 3.21 (s, 3H), 3.08 (s, 3H), 2.67 (s, 3H), 2.65 (s, 3H), 2.50-2.35 (m, 2H), 2.25-1.80 (m, 6H), 1.99 (s, 3H), 1.75-1.55 (m, 3H), 1.50-0.75 (m, 57H); ESI MS m/z 1233 [C62H109N11O14+H]+.
Example 3
Preparation of Trans Acetyl Cyclosporin Vinyl Iodide
To an ice-cooled suspension of chromium(II) chloride (1.0 g, 8.2 mmol) in THF (25 mL) was added a solution of acetyl cyclosporin aldehyde from Example 2 (0.50 g, 0.41 mmol) and iodoform (1.29 g, 3.28 mmol) in THF (25 mL). After 7 h at 0° C., the reaction mixture was poured into ice-water (50 mL). The water layer was extracted with ethyl acetate (3×60 mL). The combined organics were dried over anhydrous sodium sulfate and concentrated. The material was purified by semi-preparative HPLC to afford trans acetyl cyclosporin vinyl iodide (290 mg, 52%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 8.47 (d, J=9.8 Hz, 1H), 8.01 (d, J=6.4 Hz, 1H), 7.56 (d, J=8.8 Hz, 1H), 7.54 (d, J=7.5 Hz, 1H), 6.50-6.40 (m, 1H), 5.84 (d, J=14.3 Hz, 1H), 5.69-5.10 (m, 6H), 4.97 (d, J=11.1 Hz, 2H), 4.87-4.73 (m, 2H), 4.64 (d, J=13.8 Hz, 1H), 4.43 (t, J=7.0 Hz, 1H), 3.43 (s, 3H), 3.28 (s, 3H), 3.26 (s, 3H), 3.20 (s, 3H), 3.12 (s, 3H), 2.68 (s, 3H), 2.66 (s, 3H), 2.45-2.35 (m, 1H), 2.28-1.80 (m, 8H), 2.06 (s, 3H), 1.77-1.60 (m, 3H), 1.50-0.75 (m, 56H); ESI MS m/z 1357 [C63H110IN11O13+H]+.
Example 4
Preparation of the Acetate of Cyclosporin Alkyne
A mixture of acetyl cyclosporin vinyl iodide from Example 3 (90 mg, 0.066 mmol), CuI (6 mg, 0.033 mmol), and PdCl2(PPh3)2 (23 mg, 0.033 mmol) in Et3N (3 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with (trimethylsilyl)acetylene (65 mg, 0.66 mmol). Reaction was allowed to stir for 3 h at room temperature. Solution was filtered through a micro-filter and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkyne (37 mg, 42%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.47 (d, J=9.6 Hz, 1H), 8.03 (d, J=6.9 Hz, 1H), 7.52 (d, J=9.0 Hz, 1H), 7.47 (d, J=7.7 Hz, 1H), 6.12-6.04 (m, 2H), 5.68 (dd, J=10.9, 3.7 Hz, 2H), 5.53 (s, 1H), 5.48 (s, 1H), 5.36-5.11 (m, 7H), 5.01-4.62 (m, 10H), 4.41 (t, J=7.0 Hz, 2H), 4.06 (t, J=6.6 Hz, 2H), 3.44 (s, 3H), 3.27 (s, 3H), 3.26 (s, 3H), 3.20 (s, 3H), 3.07 (s, 3H), 2.68 (s, 2H), 2.65 (s, 3H), 2.04 (s, 2H), 2.00 (s, 3H), 1.31 (d, J=7.1 Hz, 2H), 1.26 (d, J=7.0 Hz, 2H), 1.06-0.79 (m, 50H), 0.17 (s, 9H); ESI MS m/z 1327 [C68H119N11O13Si+H]+.
Example 5
Preparation of Cyclosporin Alkyne
A solution of the acetate of cyclosporin alkyne from Example 4 (37 mg, 0.02 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (30 mg, 0.21 mmol) and allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the cyclosporin alkyne (15 mg, 45%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.94 (d, J=9.8 Hz, 1H), 7.64 (d, J=7.4 Hz, 1H), 7.41 (d, J=8.3 Hz, 1H), 7.16 (d, J=7.8 Hz, 1H), 6.31-6.20 (m, 2H), 5.70 (dd, J=10.8, 3.7 Hz, 2H), 5.50 (d, J=5.9 Hz, 2H), 5.42 (s, 1H), 5.36 (s, 1H), 5.32 (d, J=3.7 Hz, 1H), 5.28 (d, J=3.9 Hz, 1H), 5.11-4.92 (m, 6H), 4.84 (t, J=7.1 Hz, 2H), 4.47 (s, 1H), 4.75-4.62 (m, 4H), 4.13 (s, 1H), 3.91-3.80 (m, 3H), 3.51 (s, 3H), 3.39 (s, 3H), 3.26 (s, 3H), 3.10 (s, 6H), 2.70 (s, 3H), 2.68 (s, 3H), 1.34 (d, J=7.2 Hz, 2H), 1.29-1.24 (m, 8H), 1.08-0.81 (m, 45H), 0.74 (d, J=6.4 Hz, 2H); ESI MS m/z 1213 [C63H109N11O12+H]+; HPLC >99% (AUC), tR=13.58 min.
Example 6
Preparation of Cyclosporin Alkyne
To a solution of 1-propynylmagnesium bromide (7.3 mL, 0.5 M in THF, 3.6 mmol) under stirring and nitrogen was added zinc chloride (3.6 mL, 1 M in ether, 3.6 mmol). After 30 min at room temperature, a solution of acetyl cyclosporin vinyl iodide from Example 3 (500 mg, 0.36 mmol) in THF (5 mL) was added, followed by dichlorobis(triphenylphosphine)palladium(II) (258 mg, 0.36 mmol). After 18 h at room temperature, the solvent was removed under reduced pressure. The crude material was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkyne (335 mg, 71%) as a pale yellow solid: ESI MS m/z 1269 [C66H113N11O3+H]+.
To a stirred solution of the above cyclosporin alkyne (335 mg, 0.26 mmol) in methanol (10 mL) was added potassium carbonate (360 mg, 2.6 mmol) at room temperature. After 18 h, ethyl acetate (100 mL) and water (50 mL) were added. The organic layer was separated, dried over anhydrous sodium sulfate, and concentrated under vacuum to afford crude product. The material was purified by semi-preparative HPLC to afford cyclosporin alkyne (53 mg, 16%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 7.89 (d, J=9.5 Hz, 1H), 7.70 (d, J=7.2 Hz, 1H), 7.50 (d, J=8.2 Hz, 1H), 7.26 (d, J=5.2 Hz, 1H), 6.03-5.93 (m, 1H), 5.70 (dd, J1=4.0 Hz, J2=11.0 Hz, 1H), 5.50 (d, J=5.8 Hz, 1H), 5.40-5.29 (m, 3H), 5.16-4.65 (m, 8H), 4.49 (t, J=7.0 Hz, 1H), 3.82-3.78 (m, 1H), 3.49 (s, 3H), 3.36 (s, 3H), 3.23 (s, 3H), 3.11 (s, 3H), 3.09 (s, 3H), 2.72 (s, 3H), 2.70 (s, 3H), 2.60-0.70 (m, 70H); ESI MS m/z 1227 [C64H11N11O12+H]+; HPLC >99% (AUC), tR=14.17 min.
Example 7
Preparation of 1-(Trimethylsilyl)propyne-d3 
Trimethylsilylacetylene (4.9 mL, 34.5 mmol) is dissolved in THF (20 mL) and cooled to −78° C. n-BuLi (15.2 mL, 2.5 M in hexanes, 38 mmol) was added to the reaction dropwise and stirred for 0.5 h at −78° C. Iodomethane-d3 (5.0 g, 38 mmol) was added to the reaction dropwise. Resulting mixture was warmed to room temperature over 1 h. Reaction was quenched with water and extracted with ethyl ether (3×100 mL). Combined organics were washed with water, brine, dried over sodium sulfate and distilled using a short path distillation setup to remove most of solvents. Residue was transferred to a small flask and distilled to give 1-(trimethylsilylpropyne-d3 (1.8 g, 32%) as colorless oil: 1H NMR (300 MHz, CDCl3) δ 0.13 (s, 9H); ESI MS m/z 116 [C6H9D3Si+H]+.
Example 8
Preparation of Deuterated Cyclosporin Alkyne
1-(Trimethylsilyl)propyne-d3 from Example 7 (64 mg, 0.5 mmol) was dissolved in Et3N (3 mL) and cooled to 0° C. Solution was treated with Bu4NF (0.66 mL, 1 M in THF, 0.66 mmol) and allowed to stir at 0° C. under N2 atmosphere for 10 min. Reaction was allowed to warm to room temperature. After warming, the reaction mixture was treated with acetyl cyclosporin vinyl iodide from Example 3 (75 mg, 0.05 mmol), CuI (5 mg, 0.02 mmol), and PdCl2(PPh3)2 (19 mg, 0.02 mmol). Reaction was kept stirring for 3 h at room temperature. Solution was filtered through a micro-filter and then concentrated in vacuo.
The above crude product (32 mg, 0.025 mmol) was dissolved in methanol (2 mL) and stirred at room temperature. Reaction mixture was treated with potassium carbonate (35 mg, 0.25 mmol) and allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford deuterated cyclosporin alkyne (15 mg, 50%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.98 (d, J=11.5 Hz, 1H), 7.62 (d, J=7.5 Hz, 1H), 7.42 (d, J=8.3 Hz, 1H), 7.15 (d, J=7.9 Hz, 1H), 6.06-5.96 (m, 2H), 5.70 (dd, J=10.8, 3.8 Hz, 2H), 5.50 (d, J=5.9 Hz, 2H), 5.39 (s, 1H), 5.35-5.28 (m, 2H), 5.13-4.90 (m, 10H), 4.82 (t, J=7.2 Hz, 2H), 4.77 (s, 1H), 4.75-4.62 (m, 6H), 4.50 (t, J=7.0 Hz, 2H), 3.51 (s, 3H), 3.39 (s, 3H), 3.26 (s, 3H), 3.10 (s, 6H), 2.70 (s, 3H), 2.68 (s, 3H), 1.34 (d, J=7.2 Hz, 2H), 1.25 (t, J=3.0 Hz, 4H), 1.09-0.81 (m, 45H), 0.71 (d, J=6.1 Hz, 2H); ESI MS m/z 1230 [C64H108D3N11O12+H]+; HPLC >99% (AUC), tR=13.74 min.
Example 9
Preparation of Trans-Cyclosporin Vinyl Iodide
To a stirred solution of trans-acetyl cyclosporin vinyl iodide from Example 3 (200 mg, 0.15 mmol) in methanol (20 mL) was added potassium carbonate (518 mg, 3.75 mmol) at room temperature. After 12 h at room temperature, methanol was evaporated. Water (30 mL) was added and the mixture was extracted with ethyl acetate (3×80 mL). The organic layer was separated, dried over anhydrous sodium sulfate, and concentrated under vacuum to afford crude product. The material was purified by semi-preparative HPLC to afford trans-cyclosporin vinyl iodide (125 mg, 63%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.90 (d, J=9.3 Hz, 1H), 7.66 (d, J=6.5 Hz, 1H), 7.49 (d, J=8.5 Hz, 1H), 7.18 (d, J=7.8 Hz, 1H), 6.55-6.43 (m, 1H), 5.93 (d, J=14.0 Hz, 1H), 5.69 (d, J=8.1 Hz, 1H), 5.47 (d, J=5.9 Hz, 1H), 5.32 (d, J=8.0 Hz, 1H), 5.12-4.92 (m, 4H), 4.82 (t, J=6.2 Hz, 1H), 4.74 (d, J=14.8 Hz, 1H), 4.67 (t, J=9.1 Hz, 1H), 4.53 (t, J=7.2 Hz, 1H), 3.82 (t, J=6.2 Hz, 1H), 3.50 (s, 3H), 3.37 (s, 3H), 3.25 (s, 3H), 3.11 (s, 6H), 2.72 (s, 3H), 2.69 (s, 3H), 2.48-1.90 (m, 8H), 1.80-1.53 (m, 6H), 1.50-0.72 (m, 55H); ESI MS m/z 1315 [C61H108N11O12+H]+; HPLC >99% (AUC), tR=14.35 min.
Example 10
Preparation of Cyclosporin Alkyne
A mixture of cyclosporin vinyl iodide from Example 9 (82 mg, 0.062 mmol), CuI (6 mg, 0.031 mmol), and PdCl2(PPh3)2 (22 mg, 0.031 mmol) in Et3N (3 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with (trimethylsilyl)acetylene (61 mg, 0.62 mmol). Reaction was allowed to stir for 3 h at room temperature. Solution was filtered through a micro-filter and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkyne (30 mg, 37%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 7.89 (d, J=9.7 Hz, 1H), 7.61 (d, J=7.5 Hz, 1H), 7.48 (d, J=8.0 Hz, 1H), 7.13 (d, J=7.8 Hz, 1H), 6.21-6.10 (m, 2H), 5.71 (dd, J=10.5, 3.6 Hz, 2H), 5.53 (d, J=5.3 Hz, 2H), 5.47 (s, 1H), 5.42 (s, 1H), 5.27 (dd, J=11.4, 3.8 Hz, 2H), 5.21-4.99 (m, 6H), 4.93-4.71 (m, 4H), 4.62 (t, J=9.3 Hz, 2H), 4.55 (d, J=7.3 Hz, 2H), 3.51 (s, 3H), 3.38 (s, 3H), 3.26 (s, 3H), 3.10 (s, 3H), 3.09 (s, 3H), 2.70 (s, 3H), 2.69 (s, 3H), 1.34 (d, J=7.2 Hz, 2H), 1.32-1.24 (m, 9H), 1.08-0.83 (m, 45H), 0.68 (d, J=5.7 Hz, 2H), 0.17 (s, 9H); ESI MS m/z 1285 [C66H117N11O12Si+H]+; HPLC 97.1% (AUC), tR=22.14 min.
Example 11
Preparation of Cyclosporin Alkyne
The acetate of cyclosporin alkyne from Example 4 (488 mg, 0.52 mmol) was dissolved in THF (10 mL) and cooled to 0° C. Solution was treated with Bu4NF (6.3 mL, 1 M in THF, 6.3 mmol) and allowed to stir for 20 min under N2 atmosphere. Reaction was quenched with saturated sodium bicarbonate solution and warmed to room temperature. Reaction mixture was extracted with ethyl acetate (3×100 mL). Combined organic layers were washed with brine, dried over sodium sulfate and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkyne (231 mg, 50%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.51 (d, J=9.7 Hz, 1H), 8.00 (d, J=6.7 Hz, 1H), 7.71-7.63 (m, 2H), 7.56-7.43 (m, 2H), 7.38 (d, J=9.1 Hz, 1H), 6.26-6.15 (m, 2H), 5.67 (dd, J=7.1, 3.8 Hz, 2H), 5.53 (d, J-=5.9 Hz, 2H), 5.38 (dd, J=11.9, 3.9 Hz, 2H), 5.31-5.26 (m, 2H), 5.14 (t, J=7.6 Hz, 2H), 4.97 (d, J=11.0 Hz, 2H), 4.94-4.73 (m, 4H), 4.46-4.33 (m, 8H), 3.44 (s, 3H), 3.27 (s, 3H), 3.25 (s, 3H), 3.21 (s, 3H), 3.09 (s, 3H), 2.67 (s, 3H), 2.65 (s, 3H), 2.01 (s, 3H), 1.32-1.23 (m, 4H), 1.06-0.70 (m, 50H); ESI MS m/z 1255 [C65H111N11O13+H]+.
Example 12
Preparation of the Acetate of Cyclosporin Alkynyl Iodide
A mixture of cyclosporin alkyne from Example 11 (65 mg, 0.05 mmol) and CuI (100 mg, 0.52 mmol) in THF (3 mL) was cooled to −15° C. Bis-(trimethylsilyl)peroxide (90 mg, 0.52 mmol) was added to the reaction dropwise under N2 atmosphere. The reaction was kept stirring at −15° C. for 15 min and then allowed to warm to room temperature. Reaction was heated to 50° C. and stirred overnight. Reaction mixture was diluted with THF, washed with a saturated solution of ammonium chloride, washed with brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkynyl iodide (8 mg, 11%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.44 (d, J=9.6 Hz, 1H), 8.02 (d, J=6.6 Hz, 1H), 7.64 (d, J=9.3 Hz, 1H), 7.58 (d, J=7.5 Hz, 1H), 6.09-5.98 (m, 2H), 5.68 (d, J=11.1 Hz, 2H), 5.55-5.06 (m, 101H), 5.97 (d, J=10.9 Hz, 2H), 4.88-4.72 (m, 8H), 4.64 (d, J=13.7 Hz, 2H), 4.44 (t, J=6.8 Hz, 2H), 3.43 (s, 3H), 3.25 (s, 3H), 3.23 (s, 3H), 3.19 (s, 3H), 3.10 (s, 3H), 2.68 (s, 3H), 2.66 (s, 3H), 2.01 (s, 3H), 1.40-1.25 (m, 4H), 1.10-0.71 (m, 50H); ESI MS m/z 1381 [C65H110IN11O13+H]+.
Example 13
Preparation of Cyclosporin Alkynyl Iodide
A solution of the acetate of cyclosporin alkynyl iodide from Example 12 (8 mg, 0.006 mmol) in methanol (1 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (20 mg, 0.14 mmol) and allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkynyl iodide (3.2 mg, 46%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.95 (d, J=9.7 Hz, 1H), 7.64 (d, J=7.4 Hz, 1H), 7.47 (d, J=8.0 Hz, 1H), 7.21 (d, J=7.7 Hz, 1H), 6.23-6.20 (m, 2H), 5.70 (dd, J=10.8, 3.7 Hz, 2H), 5.55 (s, 1H), 5.48 (d, J=6.0 Hz, 2H), 5.28 (dd, J=11.3, 3.7 Hz, 2H), 5.14-4.91 (m, 6H), 4.82 (t, J=7.2 Hz, 2H), 4.77 (s, 1H), 4.70-4.62 (m, 3H), 4.52 (t, J=7.1 Hz, 2H), 3.81 (d, J=6.4 Hz, 2H), 3.50 (s, 3H), 3.39 (s, 3H), 3.26 (s, 3H), 3.10 (s, 6H), 2.69 (s, 3H), 2.68 (s, 3H), 1.34 (d, J=7.2 Hz, 2H), 1.31-1.22 (m, 9H), 1.08-0.80 (m, 45H), 0.72 (d, J=6.5 Hz, 2H); ESI MS m/z 1339 [C63H108IN11O12+H]+; HPLC 95.4% (AUC), tR=19.54 min.
Example 14
Preparation of the Acetate of Cyclosporin Alkynyl Bromide
A solution of cyclosporin alkyne from Example 11 (96 mg, 0.08 mmol) and CuBr (328 mg, 2.3 mmol) in THF (4 mL) was cooled to −15° C. Bis(trimethylsilyl)peroxide (408 mg, 2.3 mmol) was added to the reaction dropwise, under N2 atmosphere. Reaction mixture was kept stirring at −15° C. for 20 min, then allowed to warm to room temperature and stirred an additional 5 h. Reaction was quenched with saturated ammonium chloride solution and extracted with ethyl acetate. Organic layer was washed with brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkynyl bromide (19 mg, 69%) as an off-white solid: ESI MS m/z 1333 [C65H110BrN11O13+H]+.
Example 15
Preparation of Cyclosporin Alkynyl Bromide
A solution of the acetate of cyclosporin alkynyl bromide from Example 14 (19 mg, 0.01 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (30 mg, 0.22 mmol) and was allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkynyl bromide (8 mg, 43%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.96 (d, J=9.7 Hz, 1H), 7.65 (d, J=7.2 Hz, 1H), 7.43 (d, J=8.1 Hz, 1H), 7.18 (d, J=7.8 Hz, 1H), 6.24-6.14 (m, 2H), 5.73-5.68 (m, 1H), 5.48 (d, J=6.2 Hz, 2H), 5.40 (s, 1H), 5.35 (s, 1H), 5.29 (dd, J=11.7, 3.8 Hz, 2H), 5.07 (d, J=10.7 Hz, 2H), 5.01-4.93 (m, 3H), 4.85 (t, J=7.2 Hz, 2H), 4.74 (s, 1H), 4.69 (s, 1H), 4.63 (s, 1H), 4.49 (t, J=7.2 Hz, 2H), 3.83 (t, J=6.5 Hz, 2H), 3.50 (s, 3H), 3.39 (s, 3H), 3.26 (s, 3H), 3.10 (s, 6H), 2.70 (s, 3H), 2.68 (s, 3H), 2.00 (s, 6H), 1.35 (d, J=7.1 Hz, 2H), 1.26 (d, J=4.0 Hz, 3H), 1.08-0.80 (m, 48H), 0.74 (d, J=6.4 Hz, 1H); ESI MS m/z 1291 [C63H108BrN11O12+H]+; HPLC 96.9% (AUC), tR=20.07 min.
Example 16
Preparation of the Acetate of Cyclosporin Alkynyl Amine
A mixture of acetyl cyclosporin vinyl iodide from Example 3 (60 mg, 0.044 mmol), CuI (4 mg, 0.022 mmol), and PdCl2(PPh3)2 (15 mg, 0.022 mmol) in Et3N (3 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with N-methylpropargylamine (30 mg, 0.44 mmol). Reaction was allowed to stir for 6 h at room temperature. Solution was filtered through a micro-filter and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkynyl amine (9.5 mg, 17%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.45 (d, J=9.7 Hz, 1H), 7.99 (d, J=6.9 Hz, 1H), 7.44 (t, J=8.0 Hz, 2H), 5.98-5.89 (m, 2H), 5.67 (dd, J=10.8, 3.6 Hz, 2H), 5.51 (d, J=3.0 Hz, 2H), 5.40-5.23 (m, 7H), 5.14 (t, J=7.6 Hz, 2H), 5.00-4.74 (m, 10H), 4.63 (d, J=13.8 Hz, 2H), 4.42 (t, J=7.0 Hz, 2H), 4.10 (s, 1H), 3.44 (s, 3H), 3.26 (s, 3H), 3.24 (s, 3H), 3.20 (s, 3H), 3.08 (s, 3H), 2.67 (s, 3H), 2.65 (s, 3H), 2.57 (s, 2H), 2.02 (s, 3H), 2.01 (s, 2H), 1.30 (t, J=6.8 Hz, 2H), 1.25 (s, 2H), 1.06-0.78 (m, 50H); ESI MS m/z 1298 [C67H116N12O13+H]+.
Example 17
Preparation of Cyclosporin Alkynyl Amine
A solution of the acetate of cyclosporin alkynyl amine from Example 16 (9.5 mg, 0.007 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (11 mg, 0.07 mmol) and allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkynyl amine (4.5 mg, 49%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 8.00 (d, J=10.6 Hz, 1H), 7.65 (d, J=8.5 Hz, 1H), 7.61 (d, J=6.9 Hz, 1H), 7.21 (d, J=7.9 Hz, 1H), 6.15-6.04 (m, 2H), 5.67 (dd, J=11.0, 4.1 Hz, 2H), 5.54-5.38 (m, 2H), 5.33 (d, J=8.1 Hz, 1H), 5.08-4.63 (m, 6H), 4.85-4.63 (m, 8H), 4.61 (s, 1H), 1.50 (t, J=7.2 Hz, 2H), 4.41 (s, 1H), 4.26 (d, J=1.7 Hz, 2H), 4.14 (d, J=1.7 Hz, 2H), 4.08-3.97 (m, 2H), 3.50 (s, 3H), 3.40 (s, 3H), 3.24 (s, 3H), 3.12 (s, 3H), 3.11 (s, 3H), 2.67 (s, 3H), 2.66 (s, 3H), 2.00 (s, 2H), 1.54 (d, J=9.6 Hz, 2H), 1.46 (s, 1H), 1.38-1.25 (m, 6H), 1.05-0.80 (m, 45H), 0.77 (d, J=6.5 Hz, 2H); ESI MS m/z 1256 [C65H114N12O12+H]+; HPLC 98.8% (AUC), tR=12.28 min.
Example 18
Preparation of the Acetate of Cyclosporin Alkynyl Amine
A mixture of acetyl cyclosporin vinyl iodide from Example 3 (60 mg, 0.044 mmol), CuI (4 mg, 0.022 mmol), and PdCl2(PPh3)2 (15 mg, 0.022 mmol) in Et3N (3 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with 1-(dimethylamino)-2-propyne (38 mg, 0.44 mmol). Reaction was allowed to stir for 6 h at room temperature. Solution was filtered through a micro-filter and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkynyl amine (33 mg, 56%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.49 (d, J=9.6 Hz, 1H), 8.02 (d, J=6.8 Hz, 1H), 7.45 (t, J=7.7 Hz, 2H), 6.06-5.95 (m, 2H), 5.67 (dd, J=1.0, 3.8 Hz, 2H), 5.52 (d, J=6.8 Hz, 2H), 5.36 (s, 1H), 5.31 (s, 1H), 5.14 (t, J=7.6 Hz, 2H), 5.00-4.94 (m, 9H), 4.86 (t, J=7.3 Hz, 2H), 4.75 (t, J=9.5 Hz, 2H), 4.65 (d, J=13.8 Hz, 2H), 4.41 (t, J=7.0 Hz, 2H), 4.12 (dd, J=14.2, 7.1 Hz, 2H), 3.44 (s, 3H), 3.26 (s, 3H), 3.25 (s, 3H), 3.21 (s, 3H), 3.07 (s, 3H), 2.67 (s, 2H), 2.65 (s, 3H), 2.32 (s, 6H), 2.04 (s, 2H), 2.01 (s, 3H), 1.31 (d, J=7.1 Hz, 2H), 1.26 (d, J=6.8 Hz, 2H), 1.06-0.59 (m, 50H); ESI MS m/z 1312 [C68H118N12O13+H]+.
Example 19
Preparation of Cyclosporin Alkynyl Amine
A solution of the acetate of cyclosporin alkynyl amine from Example 18 (33 mg, 0.02 mmol) in methanol (3 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (34 mg, 0.2 mmol) and allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkynyl amine (17 mg, 55%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.98 (d, J=9.7 Hz, 1H), 7.64 (d, J=7.6 Hz, 1H), 7.48 (d, J=8.1 Hz, 1H), 7.12 (d, J=7.9 Hz, 1H), 6.21-6.12 (m, 2H), 5.70 (dd, J=10.7, 3.6 Hz, 2H), 5.43 (d, J=5.7 Hz, 2H), 5.47 (s, 1H), 5.42 (s, 1H), 5.28 (dd, J=11.5, 3.8 Hz, 2H), 5.11-4.99 (m, 8H), 4.92 (dd, J=9.7, 6.0 Hz, 2H), 4.82 (t, J=7.4 Hz, 2H), 4.75 (s, 2H), 4.70 (s, 2H), 4.63 (t, J=9.4 Hz, 2H), 4.54 (t, J=7.3 Hz, 2H), 3.51 (s, 3H), 3.39 (s, 3H), 3.26 (s, 3H), 3.11 (s, 3H), 3.10 (s, 3H), 2.70 (s, 3H), 2.68 (s, 3H), 2.55 (s, 3H), 1.34 (d, J=7.2 Hz, 2H), 1.30-1.24 (m, 9H), 1.09-0.81 (m, 45H), 0.70 (d, J=6.0 Hz, 2H); ESI MS m/z 1270 [C66H116N12O12+H]+; HPLC >99% (AUC), tR=12.37 min.
Example 20
Preparation of the Acetate of Cyclosporin Alkynyl Alcohol
A mixture of acetyl cyclosporin vinyl iodide from Example 3 (300 mg, 0.22 mmol), CuI (21 mg, 0.11 mmol), and PdCl2(PPh3)2 (39 mg, 0.055 mmol) in Et3N (5 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with propargyl alcohol (124 mg, 2.2 mmol). Reaction was allowed to stir for 3 h at room temperature. Solution was filtered through a micro-filter and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkynyl alcohol (100 mg, 36%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.44 (d, J=9.9 Hz, 1H), 7.96 (d, J=6.9 Hz, 1H), 7.43 (d, J=7.9 Hz, 2H), 5.68 (dd, J=10.9, 3.9 Hz, 2H), 5.57 (d, J=10.2 Hz, 1H), 5.27 (d, J=3.3 Hz, 2H), 5.23 (d, J=3.4 Hz, 2H), 5.00-4.80 (m, 8H), 4.64 (s, 1H), 4.60 (s, 1H), 4.46-4.25 (m, 5H), 4.06 (t, J=6.7 Hz, 2H), 3.43 (s, 3H), 3.25 (s, 3H), 3.20 (s, 3H), 3.10 (s, 3H), 2.67 (s, 3H), 2.65 (s, 3H), 2.04 (s, 4H), 2.03 (s, 5H), 1.30 (t, J=7.6 Hz, 2H), 1.25 (s, 5H), 1.06-0.76 (m, 51H); ESI MS m/z 1285 [C66H113N11O14+H]+.
Example 21
Preparation of Cyclosporin Alkynyl Alcohol
A solution of acetate of cyclosporin alkynyl alcohol from Example 20 (32 mg, 0.025 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (38 mg, 0.27 mmol) and allowed to keep stirring under N2 atmosphere overnight. The mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkynyl alcohol (21 mg, 68%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.60 (d, J=9.8 Hz, 1H), 7.40 (d, J=9.0 Hz, 2H), 7.19 (d, J=7.7 Hz, 1H), 6.10-5.99 (m, 1H), 5.66 (dd, J=10.6, 3.8 Hz, 2H), 5.46 (s, 1H), 5.41-5.34 (m, 4H), 5.14-5.02 (m, 6H), 4.89 (d, J=4.6 Hz, 2H), 4.94 (d, J=4.8 Hz, 2H), 4.83-4.66 (m, 4H), 4.44 (t, J=7.1 Hz, 1H), 4.30 (d, J=11.9 Hz, 2H), 4.11-4.02 (m, 4H), 3.50 (s, 3H), 3.39 (s, 3H), 3.23 (s, 3H), 3.10 (s, 3H), 3.09 (s, 3H), 2.68 (s, 6H), 2.18-2.11 (m, 7H) 1.38 (d, J=7.2 Hz, 5H), 1.24 (d, J=6.6 Hz, 6H), 1.06-0.78 (m, 39H); ESI MS m/z 1243 [C64H111N11O13+H]+; HPLC >99% (AUC), tR=13.16 min.
Example 22
Preparation of Cyclosporin Alkynyl Aldehyde
A mixture of the acetate of cyclosporin alkynyl alcohol from Example 20 (100 mg, 0.77 mmol), N-methylmorpholine N-oxide (14 mg, 0.121 mmol), 4 Å molecular sieves (200 mg) was dissolved in methylene chloride (2 mL). Mixture was treated with tetrapropylammonium perruthenate (3 mg, 0.008 mmol) and stirred at room temperature under N2 atmosphere. Mixture was kept stirring for 2 h and then filtered through a pad of silica gel. The filtrate was concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkynyl aldehyde (88 mg, 89%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 9.32 (s, 1H), 8.46 (d, J=9.5 Hz, 1H), 8.01 (d, J=6.6 Hz, 1H), 7.68 (d, J=8.9 Hz, 1H), 7.58 (d, J=7.5 Hz, 1H), 6.52-6.41 (m, 2H), 5.68 (dd, J=10.8, 3.5 Hz, 2H), 5.53 (d, J-=12.7 Hz, 2H), 5.40-5.13 (m, 15H), 4.96 (d, J=11.0 Hz, 2H), 4.64 (d, J=13.8 Hz, 2H), 4.44 (t, J=6.9 Hz, 2H), 3.98 (s, 2H), 3.44 (s, 3H), 3.26 (s, 2H), 3.24 (s, 3H), 3.20 (s, 3H), 3.11 (s, 3H), 2.67 (s, 3H), 2.66 (s, 3H), 2.02 (s, 3H), 1.33-1.19 (m, 4H), 1.06-0.75 (m, 50H); ESI MS m/z 1283 [C66H111N11O14+H]+.
Example 23
Preparation of the Acetate of trans-Cyclosporin Vinyl Iodide
A solution of cyclosporin alkynyl aldehyde from Example 22 (87 mg, 0.068 mmol) and iodoform (232 mg, 0.68 mmol) in THF (3 mL) was cooled to −78° C. After cooling, dry Cr(II)Cl2 (165 mg, 1.35 mmol) was added to the reaction. The reaction mixture was allowed to warm to 0° C. and stirred under N2 atmosphere for 4 h. Mixture was poured into ice water and extracted with ethyl acetate (3×100 mL). The combined organic layers were washed with brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of trans-cyclosporin vinyl iodide (18 mg, 19%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.38 (d, J=8.9 Hz, 1H), 8.01 (d, J=6.3 Hz, 1H), 7.76 (d, J=8.8 Hz, 1H), 7.63 (d, J=6.7 Hz, 1H), 6.92-6.71 (m, 7H), 6.05-5.94 (m, 2H), 5.52 (d, J=8.0 Hz, 2H), 5.37 (d, J=13.2 Hz, 2H), 5.01-4.55 (m, 10H), 4.47 (t, J=6.9 Hz, 2H), 3.41 (s, 2H), 3.25 (s, 3H), 3.21 (s, 3H), 3.19 (s, 3H), 3.10 (s, 3H), 2.83 (dd, J=10.6, 7.6 Hz, 2H), 2.70 (s, 2H), 2.68 (s, 3H), 2.03 (s, 2H), 2.02 (s, 3H), 1.34-1.25 (m, 7H), 1.06-0.74 (m, 50H); ESI MS m/z 1407 [C67H112IN11O13+H]+.
Example 24
Preparation of Cyclosporin Vinyl Iodide
A solution of the acetate of cyclosporin vinyl iodide from Example 23 (18 mg, 0.012 mmol) in methanol (1 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (50 mg, 0.36 mmol) and allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin vinyl iodide (7.5 mg, 44%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.91 (d, J=9.7 Hz, 1H), 7.64 (d, J=7.2 Hz, 1H), 7.46 (d, J=8.2 Hz, 1H), 7.21 (d, J=7.8 Hz, 1H), 6.79 (s, 1H), 6.74 (s, 2H), 6.65 (d, J=2.0 Hz, 2H), 6.60 (d, J=2.1 Hz, 1H), 6.22-6.11 (m, 2H), 5.79 (dd, J=10.7, 3.5 Hz, 2H), 5.49-5.26 (m, 3H), 5.11-4.62 (m, 6H), 4.49 (t, J=7.1 Hz, 2H), 4.40 (s, 1H), 4.30-4.20 (m, 2H), 4.14 (d, J=1.7 Hz, 2H), 3.50 (s, 3H), 3.38 (s, 3H), 3.24 (s, 3H), 3.10 (s, 6H), 2.70 (s, 3H), 2.68 (s, 3H), 1.54 (d, J=9.7 Hz, 2H), 1.45 (s, 1H), 1.38-1.25 (m, 9H), 1.07-0.43 (m, 47H); ESI MS m/z 1365 [C65H110IN11O12+H]+; HPLC >99% (AUC), tR=14.49 min.
Example 25
Preparation of the Acetate of Cyclosporin Alkynyl Alcohol
A solution of acetyl cyclosporin vinyl iodide from Example 3 (75 mg, 0.055 mmol), CuI (11 mg, 0.055 mmol), and PdCl2(PPh3)2 (39 mg, 0.055 mmol) in Et3N (3 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with 3-butyne-2-ol (39 mg, 0.55 mmol). Reaction was allowed to stir for 6 h at room temperature. Solution was washed through micro filter and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkynyl alcohol (15 mg, 21%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.45 (d, J=9.1 Hz, 1H), 7.99 (d, J=6.1 Hz, 1H), 7.40 (d, J=6.9 Hz, 2H), 5.72-5.13 (m, 12H), 5.01-4.39 (m, 10H), 4.26-4.07 (m, 2H), 3.45 (s, 3H), 3.37 (s, 3H), 3.26 (s, 3H), 3.21 (s, 3H), 3.10 (s, 3H), 2.68 (s, 3H), 2.66 (s, 3H), 2.04 (s, 6H), 1.50-1.43 (m, 5H), 1.31 (d, J=7.8 Hz, 10H), 1.26 (s, 5H), 1.08-0.75 (m, 40H); ESI MS m/z 1299 [C67H115N11O14+H]+.
Example 26
Preparation of Cyclosporin Alkynyl Alcohol
A solution of acetate of cyclosporin alkynyl alcohol from Example 25 (15 mg, 0.011 mmol) in methanol (1 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (17 mg, 0.13 mmol) and allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkynyl alcohol (5 mg, 36%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.58 (d, J=10.2 Hz, 1H), 7.41 (d, J=8.0 Hz, 2H), 7.22 (d, J=9.1 Hz, 1H), 6.06-5.94 (m, 2H), 5.66 (dd, J=10.5, 3.2 Hz, 2H), 5.49 (s, 1H), 5.47-5.34 (m, 4H), 5.14-4.91 (s, 7H), 4.80-4.57 (m, 6H), 4.45 (t, J=7.1 Hz, 2H), 4.04 (d, J=7.0 Hz, 2H), 3.50 (s, 3H), 3.38 (s, 3H), 3.23 (s, 3H), 3.10 (s, 3H), 3.08 (s, 3H), 2.69 (s, 6H), 1.42 (d, J=3.2 Hz, 6H), 1.38 (d, J=7.2 Hz, 6H), 1.27-1.24 (m, 8H), 1.07-0.75 (m, 42H); ESI MS m/z 1257 [C65H113N11O13+H]+; HPLC >99% (AUC), tR=13.44 min.
Example 27
Preparation of Cyclosporin ene-yne-ene
The acetate of cyclosporin alkynyl alcohol from Example 25 (135 mg, 0.10 mmol) was dissolved in benzene (4 mL) and stirred under N2 atmosphere. Solution was treated with Burgess reagent (98 mg, 0.40 mmol) and stirred at 60° C. for 5 h. Mixture was diluted with ethyl ether, washed with water and brine, dried over sodium sulfate, and concentrated in vacuo.
The above crude product (68 mg, 0.053 mmol) was dissolved in methanol (3 mL) and stirred at room temperature. Reaction mixture was treated with potassium carbonate (60 mg, 0.43 mmol) and allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin ene-yne-ene (47 mg, 72%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.92 (d, J=9.8 Hz, 1H), 7.63 (d, J=7.5 Hz, 1H), 7.42 (d, J=8.2 Hz, 1H), 7.15 (d, J=7.8 Hz, 1H), 6.16-6.10 (m, 2H), 5.92 (d, J=2.0 Hz, 1H), 5.90 (d, J=2.0 Hz, 1H), 5.86 (d, J=2.0 Hz, 1H), 5.70 (dd, J=10.8, 3.7 Hz, 2H), 5.63 (d, J=2.1 Hz, 1H), 5.78-5.49 (m, 4H), 5.44 (d, J=2.2 Hz, 1H), 5.41 (d, J=2.2 Hz, 1H), 5.29 (dd, J=11.4, 4.1 Hz, 2H), 5.11 (s, 2H), 5.09-4.91 (m, 4H), 4.80 (t, J=7.3 Hz, 2H), 4.71-4.62 (m, 3H), 5.52 (d, J=7.3 Hz, 2H), 3.51 (s, 3H), 3.39 (s, 3H), 3.25 (s, 3H), 3.10 (s, 6H), 2.70 (s, 3H), 2.68 (s, 3H), 1.35 (d, J=7.2 Hz, 2H), 1.27-1.24 (m, 8H), 1.08-0.82 (m, 45H), 0.73 (d, J=6.4 Hz, 2H); ESI MS m/z 1239 [C65H111N11O12+H]+; HPLC >99% (AUC), tR=14.24 min.
Example 28
Preparation of Cyclosporin ene-yne-ene
To a stirred solution of trans-acetyl cyclosporin vinyl iodide from Example 3 (130 mg, 0.095 mmol) in triethylamine (6 mL, degassed) were added 1-pentyn-3-ol (80 mg, 0.95 mmol), copper(I) iodide (18 mg, 0.095 mmol) and dichlorobis(triphenylphosphine)palladium(II) (67 mg, 0.095 mmol). After 18 h at room temperature under nitrogen, the mixture was filtered through a 0.2 μm syringe filter and the solvent was removed under reduced pressure. The crude material was purified by flash column chromatography (SiO2, 1:1 acetone/hexanes) to afford cyclosporin alkynyl alcohol (150 mg,  ̃80% pure by NMR) as a yellowish oil: ESI MS m/z 1313 [C68H117N11O14+H]+.
To a solution of the above cyclosporin alkynyl alcohol (150 mg, 0.11 mmol) in benzene (15 mL) under stirring and nitrogen was added Burgess reagent (135 mg, 0.57 mmol). The mixture was stirred at 60° C. for 2 h. As MS monitoring still showed some starting material, some Burgess reagent (135 mg, 0.57 mmol) was added and the reaction was stirred 60° C. for 2 h. After cooling down, the reaction was extracted with ethyl acetate (100 mL) and washed with water. The organic layer was separated, dried over anhydrous sodium sulfate, and concentrated under vacuum to afford the acetate of cyclosporin ene-yne-ene (38 mg), which was carried over without purification: ESI MS m/z 1295 [C68H115N111O13+H]+.
To a stirred solution of the above acetate of cyclosporin ene-yne-ene (38 mg, 0.029 mmol) in methanol (3 mL) was added potassium carbonate (30 mg, 0.21 mmol) at room temperature. After 18 h, ethyl acetate (100 mL) and water (50 mL) were added. The organic layer was separated, dried over anhydrous sodium sulfate, and concentrated under vacuum to afford crude product. The material was purified by semi-preparative HPLC to afford cyclosporin ene-yne-ene (3.1 mg, 8%) as a mixture of cis and trans isomers (yellow oil): 1H NMR (300 MHz, CDCl3) δ 7.92 (d, J=9.5 Hz, 1H), 7.63 (d, J=7.3 Hz, 1H), 7.45 (d, J=8.0 Hz, 1H), 7.14 (d, J=8.3 Hz, 1H), 6.14-6.05 (m, 1H), 5.95-5.87 (m, 1H), 5.72-5.67 (m, 1H), 5.48-4.65 (m, 17H), 3.92-3.88 (m, 1H), 3.52 (s, 3H), 3.39 (s, 3H), 3.26 (s, 3H), 3.10 (s, 6H), 2.70 (s, 3H), 2.68 (s, 3H), 2.70-0.70 (m, 67H); ESI MS m/z 1253 [C66H113N11O12+H]+; HPLC 13.6% and 86.3% (AUC), tR=15.49 and 16.67 min.
Example 29
Preparation of Cyclosporin ene-yne-ene
To a stirred solution of trans-acetyl cyclosporin vinyl iodide from Example 3 (50 mg, 0.036 mmol) in triethylamine (4 mL, degassed) were added 2-methyl-1-buten-3-yne (24 mg, 0.36 mmol), copper(I) iodide (7 mg, 0.036 mmol) and dichlorobis(triphenylphosphine)palladium(II) (26 mg, 0.036 mmol). After 18 h at room temperature under nitrogen, the mixture was filtered through a 0.2 μm syringe filter and the solvent was removed under reduced pressure. The crude material was purified by semi-preparative HPLC to afford the acetate of cyclosporin ene-yne-ene (31 mg, 65%) as a yellowish oil: ESI MS m/z 1295 [C68H115N11O13+H]+.
To a stirred solution of the above acetate of cyclosporin ene-yne-ene (31 mg, 0.02 mmol) in methanol (3 mL) was added potassium carbonate (35 mg, 0.25 mmol) at room temperature. After 18 h, ethyl acetate (100 mL) and water (50 mL) were added. The organic layer was separated, dried over anhydrous sodium sulfate, and concentrated under vacuum to afford crude product. The material was purified by semi-preparative HPLC to afford cyclosporin ene-yne-ene (14 mg, 46%) as a yellowish oil: 1H NMR (500 MHz, CDCl3) δ 7.93 (d, J=9.5 Hz, 1H), 7.68-7.62 (m, 2H), 7.28 (d, J=7.5 Hz, 1H), 6.17-6.11 (m, 1H), 6.08-6.03 (m, 1H), 5.65-5.58 (m, 2H), 5.56-5.44 (m, 2H), 5.42-4.50 (m, 8H), 3.92-3.90 (m, 1H), 3.78-3.73 (m, 1H), 3.50 (s, 3H), 3.38 (s, 3H), 3.24 (s, 3H), 3.11 (s, 3H), 3.09 (s, 3H), 2.72 (s, 3H), 2.70 (s, 3H), 1.89 (s, 3H), 2.45-0.71 (m, 69H); ESI MS m/z 1253 [C66H113N11O12+H]+; HPLC 96.4% (AUC), tR=16.55 min.
Example 30
Preparation of the Acetate of Cyclosporin Alkynyl Alcohol
A mixture of acetyl cyclosporin vinyl iodide from Example 3 (70 mg, 0.051 mmol), CuI (5 mg, 0.026 mmol), and PdCl2(PPh3)2 (18 mg, 0.026 mmol) in Et3N (3 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with 3-butyn-1-ol (37 mg, 0.51 mmol). Reaction was allowed to stir for 4 h at room temperature. Solution was filtered through micro-filter and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkynyl alcohol (52 mg, 78%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.46 (d, J=9.5 Hz, 1H), 8.04 (d, J=6.9 Hz, 1H), 7.67(d, J=9.2 Hz, 1H), 7.46 (d, J=7.7 Hz, 1H), 5.68 (dd, J=11.2, 4.6 Hz, 2H), 5.58-4.78 (m, 18H), 4.63 (d, J=13.9 Hz, 2H), 4.44 (t, J=6.9 Hz, 2H), 3.98-3.77 (m, 4H), 3.45 (s, 3H), 3.24 (s, 3H), 3.23 (s, 3H), 3.19 (s, 3H), 3.08 (s, 3H), 2.67 (s, 3H), 2.66 (s, 3H), 2.02 (s, 2H), 1.30 (d, J=6.8 Hz, 4H), 1.25 (t, J=2.2 Hz, 4H), 1.05-0.75 (m, 52H); ESI MS m/z 1299 [C67H115N11O14+H]+.
Example 31
Preparation of Cyclosporin Alkynyl Alcohol
A solution of the acetate of cyclosporin alkynyl alcohol from Example 30 (52 mg, 0.04 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (60 mg, 0.43 mmol) and was allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkynyl alcohol (22 mg, 44%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.97 (d, J=9.7 Hz, 1H), 7.62 (d, J=7.5 Hz, 1H), 7.49 (d, J=8.4 Hz, 1H), 7.20 (d, J=7.8 Hz, 1H), 5.99-5.88 (m, 2H), 5.69 (dd, J=11.0, 4.0 Hz, 1H), 5.44 (d, J=6.7 Hz, 2H), 5.38 (s, 1H), 5.36 (d, J=3.6 Hz, 1H), 5.32 (d, J=3.9 Hz, 1H), 5.11-4.95 (m, 12H), 4.84 (t, J=7.1 Hz, 2H), 4.72 (s, 1H), 4.68 (t, J=9.8 Hz, 2H), 4.52 (t, J=7.2 Hz, 1H), 3.89 (t, J=6.7 Hz, 1H), 3.74 (t, J=5.7 Hz, 1H), 3.49 (s, 3H), 3.40 (s, 3H), 3.26 (s, 3H), 3.11 (s, 3H), 3.10 (s, 3H), 2.69 (s, 3H), 2.68 (s, 3H), 1.35 (d, J=7.2 Hz, 2H), 1.25 (d, J=2.9 Hz, 4H), 1.07-0.70 (m, 54H); ESI MS m/z 1257 [C65H113N11O13+H]+; HPLC >99% (AUC), tR=17.67 min.
Example 32
Preparation of the Acetate of Cyclosporin Cyclopropyl Alkyne
A solution of cyclopropyl(trimethylsilyl)acetylene (76 mg, 0.55 mmol) in Et3N (3 mL) was cooled to 0° C. Solution was treated with Bu4NF (0.66 mL, 1 M in THF, 0.66 mmol) and allowed to stir at 0° C. under N2 atmosphere for 10 min. Reaction was allowed to warm to room temperature. After warming, the reaction mixture was treated with acetyl cyclosporin vinyl iodide from Example 3 (75 mg, 0.05 mmol), CuI (5 mg, 0.02 mmol), and PdCl2(PPh3)2 (19 mg, 0.02 mmol). Reaction was kept stirring for 3 h at room temperature. Solution was filtered through a micro filter and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin cyclopropyl alkyne (58 mg, 82%) as an off-white solid: 1H NMR (500 MHz, CDCl3) δ 8.47 (d, J=4.5 Hz, 1H), 8.01 (d, J=3.9 Hz, 1H), 7.63 (d, J=5.4 Hz, 1H), 7.57 (d, J=4.8 Hz, 1H), 5.88-5.81 (m, 2H), 5.69 (dd, J=6.6, 2.4 Hz, 2H), 5.58 (s, 1H), 5.54 (d, J=6.6 Hz, 2H), 5.47 (s, 1H), 5.30-5.20 (m, 2H), 5.17 (d, J=3.6 Hz, 2H), 5.15 (d, J=3.3 Hz, 2H), 5.08-4.80 (m, 9H), 4.63 (s, 2H), 4.47 (t, J=4.2 Hz, 2H), 4.13 (dd, J=8.7, 4.2 Hz, 4H), 4.07 (t, J=3.9 Hz, 2H), 3.42 (s, 3H), 3.25 (s, 3H), 3.22 (s, 3H), 3.19 (s, 3H), 3.09 (s, 3H), 2.69 (s, 3H), 2.67 (s, 3H), 1.32 (d, J=4.5 Hz, 2H), 1.28 (dd, J=4.2, 1.6 Hz, 4H), 1.10-0.71 (m, 51H); ESI MS m/z 1295 [C68H115N11O13+H]+.
Example 33
Preparation of Cyclosporin Cyclopropyl Alkyne
A solution of the acetate of cyclosporin cyclopropyl alkyne from Example 32 (58 mg, 0.044 mmol) in methanol (3 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (90 mg, 0.65 mmol) and allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo to afford cyclosporin cyclopropyl alkyne (27 mg, 48%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 7.90 (d, J=9.6 Hz, 1H), 7.65 (d, J=7.3 Hz, 1H), 7.50 (d, J=8.1 Hz, 1H), 7.22 (d, J=7.8 Hz, 1H), 6.03-5.92 (m, 2H), 5.70 (dd, J=10.7, 3.5 Hz, 2H), 5.49 (d, J=5.7 Hz, 2H), 5.38 (s, 1H), 5.33-4.99 (m, 12H), 4.93 (dd, J=9.5, 5.9 Hz, 2H), 4.82 (d, J=5.7 Hz, 2H), 4.76 (s, 2H), 4.71 (s, 2H), 4.65 (t, J=8.9 Hz, 2H), 4.53 (t, J=7.2 Hz, 2H), 3.49 (s, 3H), 3.37 (s, 3H), 3.24 (s, 3H), 3.10 (s, 6H), 2.71 (s, 3H), 2.69 (s, 3H), 1.35 (d, J=7.2 Hz, 2H), 1.26 (d, J=6.6 Hz, 6H), 1.07-0.48 (m, 49H); ESI MS m/z 1253 [C66H113N11O12+H]+; HPLC >99% (AUC), tR=20.26 min.
Example 34
Preparation of the Acetate of Cyclosporin Alkyne
A mixture of acetyl cyclosporin vinyl iodide from Example 3 (100 mg, 0.073 mmol), CuI (7 mg, 0.037 mmol), and PdCl2(PPh3)2 (26 mg, 0.037 mmol) in Et3N (2 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with cyclohexylacetylene (80 mg, 0.737 mmol). Reaction was allowed to stir for 6 h at room temperature. Solution was filtered through a short pad of silica gel and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkyne (75 mg, 76%) as a light brown solid: 1H NMR (300 MHz, CDCl3) δ 8.43 (d, J=9.4 Hz, 1H), 8.07 (d, J=6.7 Hz, 1H), 7.85 (d, J=11.7 Hz, 1H), 7.66 (d, J=11.4 Hz, 1H), 6.00-5.90 (m, 1H), 5.80-5.60 (m, 2H), 5.55-5.45 (m, 2H), 5.40-5.20 (m, 3H), 5.10-4.80 (m, 3H), 4.70-4.45 (m, 2H), 3.42 (s, 3H), 3.24 (s, 3H), 3.21 (m, 3H), 3.19 (s, 3H), 3.11 (s, 3H), 2.70 (s, 3H), 2.69 (s, 3H), 2.20-0.80 (m, 83H); ESI MS m/z 1337 [C71H121N11O13+H]+.
Example 35
Preparation of Cyclosporin Alkyne
A solution of the acetate of cyclosporin alkyne from Example 34 (76 mg, 0.057 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (40 mg, 0.29 mmol) and allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkyne (29 mg, 39%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.94 (d, J=9.8 Hz, 1H), 7.65-7.55(m, 2H), 7.26 (overlapped with CHCl3, 1H), 6.00-5.85 (m, 1H), 5.71 (dd, J=11.0, 4.0 Hz, 1H), 5.53 (d, J=5.5 Hz, 1H), 5.40 (d, J=15.6 Hz, 1H), 5.30 (dd, J=11.3, 3.5 Hz, 1H), 5.13 (d, J=10.8 Hz, 1H), 5.10-5.00 (m, 3H), 4.89 (dd, J=9.2, 6.2 Hz, 1H), 4.83 (t, J=7.1 Hz, 1H), 4.73 (d, J=14.1 Hz, 1H), 4.63 (t, J=9.7 Hz, 1H), 4.56 (t, J=7.3 Hz, 1H), 3.73 (t, J=7.3 Hz, 1H), 3.50 (s, 3H), 3.38 (s, 3H), 3.25 (s, 3H), 3.11 (s, 3H), 3.09 (s, 3H), 2.71 (s, 3H), 2.70 (s, 3H), 2.60-2.55 (m, 1H), 2.45-2.35 (m, 2H), 2.20-0.75 (m, 74H), 0.68 (d, J=5.8 Hz, 2H); ESI MS m/z 1295 [C69H119N11O12+H]+; HPLC 97.9% (AUC), tR=23.24 min.
Example 36
Preparation of Cyclosporin Alkyne
To a stirred solution of trans-acetyl cyclosporin vinyl iodide from Example 3 (50 mg, 0.036 mmol) in triethylamine (3 mL, degassed) were added phenylacetylene (37 mg, 0.36 mmol), copper(I) iodide (7.0 mg, 0.036 mmol) and dichlorobis(triphenylphosphine)palladium(II) (26 mg, 0.036 mmol). After 18 h at room temperature under nitrogen, the mixture was filtered through a 0.2 μm syringe filter and the solvent was removed under reduced pressure. The crude material was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkyne (34 mg, 69%) as a yellowish oil: ESI MS m/z 1331 [C71H115N11O13+H]+.
To a stirred solution of the above acetate of cyclosporin alkyne (34 mg, 0.02 mmol) in methanol (3 mL) was added potassium carbonate (30 mg, 0.2 mmol) at room temperature. After 18 h, ethyl acetate (100 mL) and water (50 mL) were added. The organic layer was separated, dried over anhydrous sodium sulfate, and concentrated under vacuum to afford crude product. The material was purified by semi-preparative HPLC to afford cyclosporin alkyne (15 mg, 45%) as a yellowish oil: 1H NMR (500 MHz, CDCl3) δ 7.92 (m, 1H), 7.61 (m, 1H), 7.49 (m, 1H), 7.41 (m, 3H), 7.21 (m, 1H), 6.20 (m, 1H), 5.65-4.45 (m, 20H), 3.98 (m, 1H), 3.73 (m, 1H), 3.52 (s, 3H), 3.39 (s, 3H), 3.25 (s, 3H), 3.10 (s, 6H), 2.71 (s, 3H), 2.69 (s, 3H), 2.45-0.70 (m, 62H). ESI MS m/z 1289 [C69H113N11O12+H]+; HPLC >98% (AUC); tR=16.67 min.
Example 37
Preparation of the Acetate of Cyclosporin Alkyne
A mixture of acetyl cyclosporin vinyl iodide from Example 3 (80 mg, 0.059 mmol), CuI (6 mg, 0.030 mmol), and PdCl2(PPh3)2 (21 mg, 0.030 mmol) in Et3N (2 mL) was stirred at room temperature under N2 atmosphere. To the above reaction mixture was then treated with 1-chloro-4-ethynylbenzene (80 mg, 0.59 mmol). The resulting reaction mixture was stirred overnight at room temperature. Reaction was filtered through a short pad of silica gel and filtrate was concentrated under reduced pressure. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkyne (54 mg, 67%) as a light brown solid: 1H NMR (300 MHz, CDCl3) δ 8.47 (d, J=9.6 Hz, 1H), 8.06 (d, J=6.8 Hz, 1H), 7.85-7.65 (m, 2H), 7.61 (d, J=7.6 Hz, 1H), 7.45-7.35 (m, 1H), 7.33-7.27 (m, 2H), 6.05-5.95 (m, 1H), 5.69 (dd, J=11.0, 3.9 Hz, 1H), 5.60-5.47 (m, 2H), 5.45-5.35 (m, 1H), 5.29 (dd, J=8.7, 4.0 Hz, 1H), 5.20-5.10 (m, 1H), 5.05-4.70 (m, 4H), 4.63 (d, J=14.1 Hz, 1H), 4.46 (t, J=7.0 Hz, 1H), 3.44 (s, 3H), 3.27 (s, 3H), 3.26 (s, 3H), 3.20 (s, 3H), 3.09 (s, 3H), 2.69 (s, 3H), 2.68 (s, 3H), 2.50-2.40 (m, 1H), 2.30-0.70 (m, 71H); ESI MS m/z 1365 [C71H114CIN11O13+H]+.
Example 38
Preparation of Cyclosporin Alkyne
A solution of the acetate of cyclosporin alkyne from Example 37 (54 mg, 0.047 mmol) in methanol (1.5 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (30 mg, 0.21 mmol) and allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated under reduced pressure. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkyne (32 mg, 62%) as an off-white solid: 1H NMR (500 MHz, CDCl3) δ 7.96 (d, J=9.7 Hz, 1H), 7.65 (d, J=7.4 Hz, 1H), 7.56 (d, J=8.2 Hz, 1H), 7.40-7.33 (m, 2H), 7.30-7.20 (m, 3H), 6.22-6.15 (m 1H), 5.70 (dd, J=11.0, 4.2 Hz, 1H), 5.62 (d, J=15.8 Hz, 1H), 5.52 (d, J=6.2 Hz, 1H), 5.32 (dd, J=11.4, 3.6 Hz, 1H), 5.12-5.00 (m, 2H), 4.96 (dd, J=9.8, 5.9 Hz, 2H), 4.82 (t, J=7.3 Hz, 1H), 4.72 (d, J=14.0 Hz, 1H), 4.67 (t, J=8.9 Hz, 1H), 4.54 (t, J=7.3 Hz, 1H), 3.82 (t, J=6.7 Hz, 1H), 3.52 (s, 3H), 3.40 (s, 3H), 3.26 (s, 3H), 3.11 (s, 3H), 3.10 (s, 3H), 2.71 (s, 3H), 2.69 (s, 3H), 2.65-2.55 (m, 1H), 2.45-2.35 (m, 1H), 2.20-0.85 (m, 65H), 0.75 (d, J=6.9 Hz, 2H); ESI MS m/z 1323 [C69H112CIN11O12+H]+; HPLC 97.3% (AUC), tR=22.54 min.
Example 39
Preparation of the Acetate of Cyclosporin Alkyne
A mixture of acetyl cyclosporin vinyl iodide from Example 3 (75 mg, 0.055 mmol), CuI (6 mg, 0.030 mmol), and PdCl2(PPh3)2 (21 mg, 0.030 mmol) in Et3N (2 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with 3-ethynylthiophine (65 mg, 0.60 mmol). Reaction was allowed to stir for 6 h at room temperature. Solution was filtered through a short pad of silica gel and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkyne (31 mg, 42%) as a light brown solid: 1H NMR (300 MHz, CDCl3) δ 8.47 (d. J=9.5 Hz, 1H), 8.06 (d, J=6.7 Hz, 1H), 7.73 (d, J=9.2 Hz, 1H), 7.63 (d, J=7.6 Hz, 1H), 7.49 (d, J=2.9 Hz, 1H), 7.25-7.20 (m, 1H), 7.15 (d, J=5.0 Hz, 1H), 6.10-5.90 (m, 1H), 5.70 (dd, J=11.2, 3.5 Hz, 1H), 5.60-4.50 (m, 9H), 4.63 (d, J=14.2 Hz, 1H), 4.51 (t, J=7.2 Hz, 1H), 3.43 (s, 3H), 3.26 (s, 6H), 3.20 (s, 3H), 3.09 (s, 3H), 2.72 (s, 3H), 2.68 (s, 3H), 2.50-2.40 (m, 1H), 2.30-0.70 (m, 71H); ESI MS m/z 1337 [C69H113N11O13S+H]+.
Example 40
Preparation of Cyclosporin Alkyne
A solution of the acetate of cyclosporin alkyne from Example 39 (31 mg, 0.023 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (15 mg, 0.108 mmol) and allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkyne (15 mg, 50%) as a white solid: 1H NMR (500 MHz, CDCl3) δ 7.94 (d, J=9.8 Hz, 1H), 7.66 (d, J=7.3 Hz, 1H), 7.60 (d, J=8.2 Hz, 1H), 7.50 (dd, J=3.0, 1.0 Hz, 1H), 7.30 (d, J=7.8 Hz, 1H), 7.24 (dd, J=5.0, 3.1 Hz, 1H), 7.11 (dd, J=5.0, 1.1 Hz, 1H), 6.30-6.20 (m, 1H), 5.70 (dd, J=11.0, 4.2 Hz, 1H), 5.61 (d, J=15.8 Hz, 1H), 5.51 (d, J=6.2 Hz, 1H), 5.34 (dd, J=11.3, 3.5 Hz, 1H), 5.15-5.00 (m, 3H), 4.95 (dd, J=9.5, 5.9 Hz, 1H), 4.83 (t, J=7.2 Hz, 1H), 4.73 (d, J=14.1 Hz, 1H), 4.67 (t, J=9.5 Hz, 1H), 4.54 (t, J=7.3 Hz, 1H), 3.83 (t, J=6.9 Hz, 1H), 3.51 (s, 3H), 3.39 (s, 3H), 3.24 (s, 3H), 3.11 (s, 3H), 3.10 (s, 3H), 2.72 (s, 3H), 2.70 (s, 3H), 2.65-2.55 (m, 1H), 2.50-2.40 (m, 1H), 2.20-0.84 (m, 67H); ESI MS m/z 1295 [C67H11N11O12S+H]+; HPLC 97.9% (AUC), tR=20.46 min.
Example 41
Preparation of the Acetate of Cyclosporin Alkyne
A mixture of acetyl cyclosporin vinyl iodide from Example 3 (80 mg, 0.059 mmol), CuI (6 mg, 0.030 mmol), and PdCl2(PPh3)2 (21 mg, 0.030 mmol) in Et3N (2 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with 2-ethynylpyridine (61 mg, 0.59 mmol). Reaction was allowed to keep stirring under nitrogen atmosphere at room temperature overnight. The reaction mixture was filtered through a short pad of silica gel and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkyne (50 mg, 64%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.56 (d, J=4.8 Hz, 1H), 8.52 (d, J=9.7 Hz, 1H), 8.03 (d, J=6.9 Hz, 1H), 7.70-7.60 (m, 2H), 7.50-7.40 (m, 2H), 7.30-7.20 (m, 1H), 6.20-6.10 (m, 1H), 5.68 (dd, J=9.0, 4.0 Hz, 1H), 5.62-5.50 (m, 3H), 5.40-5.25 (m, 2H), 5.20-5.10 (m, 1H), 5.05-4.95 (m, 2H), 4.85-4.75 (m, 1H), 4.64 (d, J=13.8 Hz, 1H), 4.42 (t, J=7.1 Hz, 1H), 3.45 (s, 3H), 3.30 (s, 3H), 3.28 (s, 3H), 3.21 (s, 3H), 3.07 (s, 3H), 2.68 (s, 3H), 2.66 (s, 3H), 2.50-2.40 (m, 2H), 2.30-0.70 (m, 71H); ESI MS m/z 1332 [C70H114N12O13+H]+.
Example 42
Preparation of Cyclosporin Alkyne
A solution of the acetate of cyclosporin alkyne from Example 41 (50 mg, 0.0375 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (35 mg, 0.25 mmol) and allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated under reduced pressure. The crude product was purified by semi-preparative HPL to afford cyclosporin alkyne (3 mg, 6%) as a white solid; 1H NMR (500 MHz, CDCl3) δ 8.79 (d, J=4.7 Hz, 1H), 8.00-7.90 (m, 2H), 7.71 (d, J=7.9 Hz, 1H), 7.65 (d, J=7.6 Hz, 1H), 7.50-7.30 (m, 2H), 7.16 (d, J=7.9 Hz, 1H), 6.50-6.40 (m, 1H), 5.75-5.65 (m, 2H), 5.53 (d, J=6.2 Hz, 1H), 5.30-5.25 (m, 1H), 5.15-5.00 (m, 3H), 4.96 (dd, J=9.9, 3.5 Hz, 1H), 4.83 (t, J=7.2 Hz, 1H), 4.72 (d, J=13.9 Hz, 1H), 4.68 (t, J=9.2 Hz, 1H), 4.51 (t, J=7.0 Hz, 1H), 3.84 (t, J=6.8 Hz, 1H), 3.52 (s, 3H), 3.40 (s, 3H), 3.26 (s, 3H), 3.11 (s, 3H), 3.10 (s, 3H) 2.71 (s, 3H), 2.69 (s, 3H), 2.65-2.60 (m, 1H), 2.45-2.40 (m, 1H), 2.20-0.70 (m, 67H); ESI MS m/z 1290 [C68H112 N12O12+H]+; HPLC >99% (AUC), tR=18.94 min.
Example 43
Preparation of the Acetate of Cyclosporin Alkyne
A mixture of acetyl cyclosporin vinyl iodide from Example 3 (100 mg, 0.073 mmol), CuI (7 mg, 0.037 mmol), and PdCl2(PPh3)2 (26 mg, 0.037 mmol) in Et3N (2 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with 1-pentyne (50 mg, 0.737 mmol). Reaction was allowed to stir for 6 h at room temperature. Solution was filtered through a short pad of silica gel then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkyne (51 mg, 54%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.43 (d, J=9.4 Hz, 1H), 8.06 (d, J=6.7 Hz, 1H), 7.83 (d, J=9.3 Hz, 1H), 7.64 (d, J=7.6 Hz, 1H), 6.00-4.40 (m, 3H), 3.43 (s, 3H), 3.24 (s, 3H), 3.23 (s, 3H), 3.19 (s, 3H), 3.11 (s, 3H), 2.70 (3H), 2.69 (s, 3H), 2.45-0.75 (m, 79H); ESI MS m/z 1297 [C68H117N11O13+H]+.
Example 44
Preparation of Cyclosporin Alkyne
A solution of the acetate of cyclosporin alkyne from Example 43 (51 mg, 0.039 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (26 mg, 0.18 mmol) and allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkyne (35 mg, 71%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.91 (d, J=9.8 Hz, 1H), 7.63 (d, J=7.5 Hz, 1H), 7.48 (d, J=8.2 Hz, 1H), 7.18 (d, J=7.8 Hz, 1H), 6.10-5.95 (m, 1H), 5.71 (dd, J=13.0, 4.1 Hz, 1H), 5.51 (d, J=5.7 Hz, 1H), 5.40 (d, J=15.8 Hz, 1H), 5.30 (dd, J=11.5, 4.0 Hz, 1H), 5.12 (d, J=10.9 Hz, 1H), 5.07-4.95 (m, 2H), 4.92 (dd, J=9.6, 6.0 Hz, 1H), 4.82 (t, J=7.3 Hz, 1H), 4.73 (d, J=14.1 Hz, 1H), 4.64 (t, J=8.3 Hz, 1H), 4.54 (t, J=7.3 Hz, 1H), 3.76 (t, J=6.8 Hz, 1H), 3.51 (s, 3H), 3.38 (s, 3H), 3.25 (s, 3H), 3.09 (s, 6H), 2.71 (s, 3H), 2.69 (s, 3H), 2.65-2.55 (m, 1H), 2.45-2.35 (m, 1H), 2.30-2.20 (m, 2H), 2.15-1.95 (m, 4H), 1.85-0.80 (m, 66H), 0.69 (d, J=6.0 Hz, 2H); ESI MS m/z 1255 [C66H115N11O12+H]+; HPLC >99% (AUC), tR=20.98 min.
Example 45
Preparation of the Acetate of Cyclosporin Alkyne
A mixture of acetyl cyclosporin vinyl iodide from Example 3 (100 mg, 0.073 mmol), CuI (7 mg, 0.037 mmol), and PdCl2(PPh3)2 (26 mg, 0.037 mmol) in Et3N (2 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with 1-hexyne (80 mg, 0.737 mmol). Reaction was allowed to stir for 4 h at room temperature. Solution was filtered through a short pad of silica gel and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkyne (61 mg, 63%) as a light brown solid: 1H NMR (300 MHz, CDCl3) δ 8.45 (d, J=9.6 Hz, 1H), 8.05 (d, J=6.8 Hz, 1H), 7.66 (d, J=9.2 Hz, 1H), 7.57 (d, J=7.7 Hz, 1H), 5.90-6.00 (m, 1H), 5.69 (dd, J=10.9, 3.8 Hz, 1H), 5.60-5.10 (m, 5H), 5.05-4.75 (m, 4H), 4.68 (d, J=13.3 Hz, 1H), 3.44 (s, 3H), 3.25 (s, 3H), 3.23 (s, 3H), 3.19 (s, 3H), 3.09 (s, 3H), 2.69 (s, 3H), 2.67 (s, 3H), 2.45-0.75 (m, 82H); ESI MS m/z 1311 [C69H119N11O13+H]+.
Example 46
Preparation of Cyclosporin Alkyne
To a solution of the acetate of cyclosporin alkyne from Example 45 (61 mg, 0.047 mmol) in methanol (2 mL) was added potassium carbonate (30 mg, 0.22 mmol) at room temperature and allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkyne (28 mg, 49%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.91 (d, J=9.7 Hz, 1H), 7.62 (d, J=7.8 Hz, 1H), 7.48 (d, J=8.2 Hz, 1H), 7.18 (d, J=7.9 Hz, 1H), 6.10-5.90 (m, 1H), 5.71 (dd, J=11.0, 3.9 Hz, 1H), 5.51 (d, J=5.7 Hz, 1H), 5.40 (d, J=15.7 Hz, 1H), 5.30 (dd, J=11.5, 3.9 Hz, 1H), 5.12 (d, J=10.9 Hz, 1H), 5.07-4.95 (m, 2H), 4.92 (dd, J=9.6, 6.0 Hz, 1H), 4.80 (t, J=7.4 Hz, 1H), 4.74 (d, J=14.1 Hz, 1H), 4.64 (t, J=8.3 Hz, 1H), 4.54 (t, J=7.3 Hz, 1H), 3.76 (t, J=6.8 Hz, 1H), 3.51 (s, 3H), 3.38 (s, 3H), 3.26 (s, 3H), 3.10 (s, 6H), 2.71 (s, 3H), 2.69 (s, 3H), 2.60-2.50 (m, 1H), 2.45-2.35 (m, 1H), 2.33-2.22 (m, 2H), 2.20-2.00 (m, 4H), 1.85-0.80 (m, 68H), 0.69 (d, J=5.8 Hz, 2H); ESI MS m/z 1269 [C67H117N11O12+H]+; HPLC 98.4% (AUC), tR=21.91 min.
Example 47
Preparation of the Acetate of Cyclosporin Alkyne
A mixture of acetylcyclosporin vinyl iodide from Example 3 (80 mg, 0.059 mmol), CuI (6 mg, 0.030 mmol), and PdCl2(PPh3)2 (21 mg, 0.030 mmol) in Et3N (2 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with 5-chloro-1-pentyne (60 mg, 0.59 mmol). Reaction was allowed to stir for 6 h at room temperature. Solution was filtered through a short pad of silica gel and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkyne (76 mg, 97%) as a light brown solid: 1H NMR (300 MHz, CDCl3) δ 8.44 (d, J=9.5 Hz, 1H), 8.05 (d, J=6.8 Hz, 1H), 7.74 (d, J=9.3 Hz, 1H), 7.61 (d, J=7.7 Hz, 1H), 5.95-5.80 (m, 1H), 5.69 (dd, J=11.1, 3.8 Hz, 1H), 5.60-5.45 (m, 3H), 5.35-5.10 (m, 2H), 5.05-4.70 (m, 4H), 4.64 (d, J=14.0 Hz, 1H), 4.46 (t, J=7.1 Hz, 1H), 3.64 (t, J=6.4 Hz, 1H), 3.44 (s, 3H), 3.25 (s, 3H), 3.23 (s, 3H), 3.19 (s, 3H), 3.10 (s, 3H), 2.69 (s, 3H), 2.68 (s, 3H), 2.70-2.60 (m, 2H), 2.25-1.50 (m, 17 h), 1.45-0.60 (m, 58H); m/z 1331 [C68H116ClN11O13+H]+.
Example 48
Preparation of Cyclosporin Alkyne
A solution of the acetate of cyclosporin alkyne from Example 47 (76 mg, 0.047 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (35 mg, 0.25 mmol) and allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkyne (29 mg, 49%) as an off-white solid: 1H NMR (500 MHz, CDCl3) δ 7.92 (d, J=9.8 Hz, 1H), 7.61 (d, J=7.5 Hz, 1H), 7.49 (d, J=8.2 Hz, 1H), 7.19 (d, J=7.9 Hz, 1H), 6.10-5.95 (m, 1H), 5.70 (dd, J=11.0, 4.3 Hz, 1H), 5.51 (d, J=5.9 Hz, 1H), 5.39 (d, J=16.1 Hz, 1H), 5.29 (dd, J=11.4, 3.8 Hz, 1H), 5.11 (d, J=10.9 Hz, 1H), 5.07-5.00 (m, 2H), 4.92 (dd, J=9.6, 6.0 Hz, 1H), 4.81 (t, J=7.2 Hz, 1H), 4.73 (d, J=14.0 Hz, 1H), 4.64 (dd, J=9.6, 8.6 Hz, 1H), 4.54 (t, J=7.3 Hz, 1H), 3.77 (t, J=7.1 Hz, 1H), 3.64 (t, J=3.4 Hz, 3H), 3.51 (s, 3H), 3.39 (s, 3H), 3.25 (s, 3H), 3.11 (s, 3H), 3.10 (s, 3H), 2.71 (s, 3H), 2.69 (s, 3H), 2.60-2.55 (m, 1H), 2.50-2.40 (m, 3H), 2.20-0.80 (m, 66 h), 0.70 (d, J=6.3 Hz, 2H); m/z 1289 [C66H114ClN11O12+H]+; HPLC 98.1% (AUC), tR=20.39 min.
Example 49
Preparation of the Acetate of Cyclosporin Alkynyl Ether
A solution of the acetate of cyclosporin alkynyl alcohol from Example 20 (77 mg, 0.06 mmol) in methylene chloride (2 mL) was stirred at room temperature under N2 atmosphere. Solution was treated with allyl chloride (46 mg, 0.60 mmol), PhCH2NEt3Cl (14 mg, 0.06 mmol) and 40% KOH in water (2 mL). The reaction was stirred for 6 h. Mixture was diluted with ether and washed with water and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkynyl ether (18 mg, 23%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.43 (d, J=9.6 Hz, 1H), 8.01 (d, J=6.6 Hz, 1H), 7.61 (d, J=9.1 Hz, 1H), 7.55 (d, J=7.7 Hz, 1H), 5.98-5.86 (m, 4H), 5.52 (d, J-=9.8 Hz, 2H), 5.38-4.62 (m, 17H), 4.45 (d, J=6.8 Hz, 1H), 4.41 (d, J=1.2 Hz, 2H), 4.26 (s, 2H), 4.13 (d, J=2.1 Hz, 2H), 4.06 (d, J=5.5 Hz, 2H), 3.43 (s, 3H), 3.25 (s, 3H), 3.23 (s, 3H), 3.19 (s, 3H), 3.09 (s, 3H), 2.68 (s, 3H), 2.66 (s, 3H), 1.54 (d, J=10.2 Hz, 2H), 1.46 (s, 2H), 1.37 (s, 2H), 1.38-1.19 (m, 4H), 1.06-0.84 (m, 48H), 0.80 (d, J=6.5 Hz, 2H); ESI MS m/z 1325 [C69H117N11O14+H]+.
Example 50
Preparation of Cyclosporin Alkynyl Ether
A solution of the acetate of cyclosporin alkynyl ether from Example 49 (14.5 mg, 0.01 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (25 mg, 0.18 mmol) and was allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkynyl ether (6 mg, 42%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.94 (d, J=9.6 Hz, 1H), 7.62 (d, J=7.6 Hz, 1H), 7.44 (d, J=8.4 Hz, 1H), 7.14 (d, J=7.9 Hz, 1H), 6.12-5.68 (m, 2H), 5.51 (d, J=5.7 Hz, 2H), 5.47 (s, 1H), 5.42 (s, 1H), 5.35-5.28 (m, 1H), 5.22 (d, J=1.3 Hz, 2H), 5.19 (d, J=1.2 Hz, 2H), 5.12 (s, 2H), 5.08 (s, 2H), 5.07-4.81 (m, 2H), 4.75 (s, 1H), 4.70 (s, 1H), 4.26 (d, J=1.7 Hz, 3H), 4.13 (s, 2H), 4.12-4.04 (m, 2H), 3.51 (s, 3H), 3.39 (s, 3H), 3.26 (s, 3H), 3.11 (s, 3H), 3.10 (s, 3H), 2.70 (s, 3H), 2.68 (s, 3H), 2.13 (s, 2H), 2.04 (s, 3H), 1.53 (d, J=6.9 Hz, 1H), 1.45 (s, 2H), 1.37 (s, 2H), 1.34 (d, J=10.8 Hz, 2H), 1.25 (s, 2H), 1.09-0.81 (m, 48H), 0.71 (d, J=6.1 Hz, 2H); ESI MS m/z 1283 [C67H115N11O13+H]+; HPLC 95.1% (AUC), tR=19.71 min.
Example 51
Preparation of the Acetate of Cyclosporin Alkynyl Ether
A mixture of acetyl cyclosporin vinyl iodide from Example 3 (70 mg, 0.051 mmol), CuI (5 mg, 0.026 mmol) and PdCl2(PPh3)2 (18 mg, 0.026 mmol) in Et3N (3 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with methyl propargyl ether (36 mg, 0.51 mmol). Reaction was allowed to stir for 4 h at room temperature. Solution was filtered through micro-filter and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkynyl ether (61 mg, 91%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.39 (d, J=9.4 Hz, 1H), 8.02 (d, J=6.5 Hz, 1H), 7.70 (d, J=9.1 Hz, 1H), 7.69 (d, J=8.6 Hz, 1H), 6.04-5.91 (m, 4H), 5.52 (d, J=11.1 Hz, 2H), 5.39-5.14 (m, 8H), 5.06-4.61 (m, 12H), 4.45 (t, J=7.0 Hz, 2H), 4.21 (d, J=1.5 Hz, 2H), 3.40 (s, 3H), 3.28 (s, 3H), 3.22 (s, 3H), 3.19 (s, 3H), 3.09 (s, 3H), 2.69 (s, 3H), 2.67 (s, 3H), 2.01 (s, 2H), 1.44-1.25 (m, 8H), 1.06-0.74 (m, 50H); ESI MS m/z 1299 [C67H115N11O14+H]+.
Example 52
Preparation of Cyclosporin Alkynyl Ether
A solution of the acetate of cyclosporin alkynyl ether from Example 51 (61 mg, 0.047 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (80 mg, 0.58 mmol) and was allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkynyl ether (31 mg, 52%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.93 (d, J=9.4 Hz, 1H), 7.63 (d, J=7.4 Hz, 1H), 7.47 (d, J=8.1 Hz, 1H), 7.18 (d, J=8.0 Hz, 1H), 6.19-6.08 (m, 2H), 5.70 (dd, J=11.0, 3.9 Hz, 1H), 5.50 (d, J=5.9 Hz, 1H), 5.45 (d, J=15.8 Hz, 1H), 5.33-5.27 (m, 2H), 5.12 (s, 2H), 5.09-5.01 (m, 1H), 4.93 (dd, J=9.8, 5.8 Hz, 1H), 4.82 (t, J=7.4 Hz, 2H), 4.76-4.61 (m, 2H), 4.53 (t, J=7.2 Hz, 2H), 4.26 (d, J=1.7 Hz, 1H), 4.20 (d, J=1.7 Hz, 3H), 3.78 (t, J=6.2 Hz, 2H), 3.51 (s, 3H), 3.39 (s, 6H), 3.38 (s, 3H), 3.25 (s, 3H), 3.11 (s, 3H), 3.10 (s, 3H), 2.70 (d, J=6.0 Hz, 6H), 1.54 (d, J=9.7 Hz, 2H), 1.46 (s, 1H), 1.36-1.24 (m, 6H), 1.08-0.82 (m, 48H), 0.70 (d, J=6.2 Hz, 2H); ESI MS m/z 1257 [C65H113N11O13+H]+; HPLC >99% (AUC), tR=18.99 min.
Example 53
Preparation of the Acetate of Cyclosporin Alkynyl Sulfide
A mixture of acetyl cyclosporin vinyl iodide from Example 3 (70 mg, 0.051 mmol), CuI (5 mg, 0.026 mmol), and PdCl2(PPh3)2 (18 mg, 0.026 mmol) in Et3N (3 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with propargyl ethyl sulfide (52 mg, 0.51 mmol). Reaction was allowed to stir overnight at room temperature. Solution was filtered through micro-filter and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkynyl sulfide (59 mg, 87%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.43 (d, J=8.6 Hz, 1H), 8.03 (d, J=6.4 Hz, 1H), 7.65 (d, J=8.9 Hz, 1H), 7.57 (d, J=7.9 Hz, 1H), 5.98-5.67 (m, 4H), 5.51 (d, J=10.8 Hz, 2H), 5.36-4.76 (m, 16H), 4.63 (d, J=14.2 Hz, 2H), 4.46 (t, J=7.0 Hz, 2H), 3.98 (s, 2H), 3.43 (s, 3H), 3.25 (s, 3H), 3.22 (s, 3H), 3.19 (s, 3H), 3.15 (s, 3H), 2.68 (s, 3H), 2.67 (s, 3H), 2.01 (s, 2H), 1.34-1.25 (m, 8H), 1.04 (d, J=6.6 Hz, 4H), 1.01-4.79 (m, 50H); ESI MS m/z 1329 [C68H117N11O13S+H]+.
Example 54
Preparation of Cyclosporin Alkynyl Sulfide
A solution of the acetate of cyclosporin alkynyl sulfide from Example 53 (59 mg, 0.044 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (70 mg, 0.51 mmol) and was allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkynyl sulfide (25 mg, 45%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.92 (d, J=9.6 Hz, 1H), 7.63 (d, J=7.5 Hz, 1H), 7.46 (d, J=8.4 Hz, 1H), 7.16 (d, J=8.0 Hz, 1H), 6.11-6.02 (m, 2H), 5.70 (dd, J=11.4, 3.9 Hz, 1H), 5.51 (d, J=5.7 Hz, 2H), 5.46-4.91 (m, 16H), 4.82 (t, J=7.5 Hz, 2H), 4.75 (s, 1H), 4.72-4.61 (m, 4H), 4.53 (t, J=7.2 Hz, 2H), 4.26 (d J=1.7 Hz, 1H), 4.13 (s, 1H), 3.76 (t, J=7.1 Hz, 2H), 3.51 (s, 3H), 3.38 (s, 3H), 3.25 (s, 3H), 3.10 (s, 3H), 3.09 (s, 3H), 2.71 (s, 3H), 2.69 (s, 3H), 1.54 (d, J=9.6 Hz, 1H), 1.45-1.24 (m, 6H), 1.08-0.82 (m, 48H), 0.69 (d, J=6.0 Hz, 1H); ESI MS m/z 1287 [C66H115N11O12+H]+; HPLC 93.1% (AUC), tR=20.29 min.
Example 55
Preparation of the Acetate of Cyclosporin Alkynyl Ether
A mixture of acetyl cyclosporin vinyl iodide from Example 3 (70 mg, 0.051 mmol), CuI (5 mg, 0.026 mmol), and PdCl2(PPh3)2 (18 mg, 0.026 mmol) in Et3N (3 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with propargyl ether (53 μL, 0.51 mmol). Reaction was allowed to stir overnight at room temperature. Solution was filtered through micro-filter and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkynyl ether (28 mg, 41%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.47 (d, J=9.6 Hz, 1H), 8.01 (d, J=6.8 Hz, 1H), 7.51 (d, J=7.1 Hz, 2H), 5.68 (dd, J=10.8, 3.6 Hz, 1H), 5.52 (d, J=8.9 Hz, 2H), 5.38-4.74 (m, 18H), 4.64 (d, J=13.8 Hz, 2H), 4.37 (d, J=1.5 Hz, 3H), 4.25 (d, J=3.6 Hz, 3H), 4.22 (d, J=3.6 Hz, 1H), 3.44 (s, 3H), 3.26 (s, 3H), 3.24 (s, 3H), 3.20 (s, 3H), 3.08 (s, 3H), 2.67 (s, 3H), 2.65 (s, 3H), 2.01 (s, 2H), 1.31 (d, J=7.1 Hz, 4H), 1.27 (d, J=7.3 Hz, 4H), 1.06-0.84 (m, 48H), 0.80 (d, J=6.6 Hz, 2H); ESI MS m/z 1323 [C69H115N11O14+H]+.
Example 56
Preparation of Cyclosporin Alkynyl Ether
A solution of the acetate of cyclosporin alkynyl ether from Example 55 (28 mg, 0.021 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (35 mg, 0.25 mmol) and was allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkynyl ether (14 mg, 53%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.94 (d, J=9.6 Hz, 1H), 7.63 (d, J=7.5 Hz, 1H), 7.45 (d, J=8.2 Hz, 1H), 7.16 (d, J=7.9 Hz, 1H), 6.18-6.09 (m, 2H), 5.70 (dd, J=11.2, 4.1 Hz, 1H), 5.50 (d, J=5.9 Hz, 1H), 5.44 (d, J=15.9 Hz, 1H), 5.29 (dd, J=11.3, 4.3 Hz, 2H), 5.12-4.61 (m, 18H), 4.53 (d, J=7.3 Hz, 1H), 4.37 (d, J=1.7 Hz, 3H), 4.26 (d, J=2.4 Hz, 3H), 3.79 (d, J=6.5 Hz, 1H), 3.58 (s, 3H), 3.51 (s, 3H), 3.26 (s, 3H), 3.11 (s, 3H), 3.10 (s, 3H), 2.70 (s, 3H), 2.68 (s, 3H), 2.43 (t, J=2.9 Hz, 2H), 1.34 (d, J=7.2 Hz, 2H), 1.25 (d, J=6.7 Hz, 2H), 1.08-0.82 (m, 48H), 0.71 (d, J=6.2 Hz, 1H); ESI MS m/z 1281 [C67H113N11O13+H]+; HPLC >99% (AUC), tR=18.88 min.
Example 57
Preparation of the Acetate of Cyclosporin Alkynyl Ether
A mixture of acetyl cyclosporin vinyl iodide from Example 3 (70 mg, 0.051 mmol), CuI (5 mg, 0.026 mmol), and PdCl2(PPh3)2 (18 mg, 0.026 mmol) in Et3N (3 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with phenyl propargyl ether (68 mg, 0.51 mmol). Reaction was allowed to stir overnight at room temperature. Solution was filtered through micro-filter and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkynyl ether (67 mg, 96%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.40 (d, J=8.9 Hz, 1H), 8.02 (d, J=6.6 Hz, 1H), 7.74 (d, J=8.7 Hz, 1H), 7.59 (d, J=5.5 Hz, 1H), 7.01-6.84 (m, 3H), 6.01-5.59 (m, 4H), 5.54-5.05 (m, 14H), 4.97 (d, J=10.7 Hz, 2H), 4.81 (d, J=7.7 Hz, 2H), 4.46 (d, J=6.8 Hz, 2H), 3.44 (s, 3H), 3.24 (s, 3H), 3.20 (s, 3H), 3.19 (s, 3H), 3.12 (s, 3H), 2.69 (s, 3H), 2.67 (s, 3H), 2.07 (s, 1H), 2.02 (s, 2H), 1.93 (s, 2H), 1.34 (d, J=7.2 Hz, 4H), 1.32-1.24 (m, 6H), 1.04 (d, J=6.3 Hz, 2H), 1.01-0.73 (m, 48H); ESI MS m/z 1361 [C72H117N11O14+H]+.
Example 58
Preparation of Cyclosporin Alkynyl Ether
A solution of the acetate of cyclosporin alkynyl ether from Example 57 (67 mg, 0.049 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (35 mg, 0.58 mmol) and was allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkynyl ether (36 mg, 55%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.90 (d, J=9.5 Hz, 1H), 7.61 (d, J=7.2 Hz, 1H), 7.43 (d, J=7.8 Hz, 1H), 7.16 (d, J=7.6 Hz, 1H), 6.98 (d, J=7.3 Hz, 2H), 6.20-6.10 (m, 2H), 5.70 (dd, J=10.9, 3.7 Hz, 1H), 5.49 (d, J=5.9 Hz, 1H), 5.44 (d, J=16.1 Hz, 1H), 5.32-4.63 (m, 25H), 4.52 (t, J=7.2 Hz, 2H), 3.50 (s, 3H), 3.38 (s, 3H), 3.25 (s, 3H), 3.10 (s, 6H), 2.70 (s, 3H), 2.68 (s, 3H), 1.40 (d, J=5.7 Hz, 2H), 1.36-0.80 (m, 52H), 0.70 (d, J=6.3 Hz, 2H); ESI MS m/z 1319 [C70H115N11O13+H]+; HPLC 94.2% (AUC), tR=20.37 min.
Example 59
Preparation of the Acetate of Cyclosporin Alkynyl Ester
A mixture of acetyl cyclosporin vinyl iodide from Example 3 (70 mg, 0.051 mmol), CuI (5 mg, 0.026 mmol), and PdCl2(PPh3)2 (18 mg, 0.026 mmol) in Et3N (3 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with t-butyl (2-propynyloxy)acetate (50 μL, 0.51 mmol). Reaction was allowed to stir for 6 h at room temperature. Solution was filtered through micro-filter and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkynyl ester (71 mg, 98%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.45 (d, J=9.3 Hz, 1H), 8.03 (d, J=6.7 Hz, 1H), 7.70 (d, J=9.0 Hz, 1H), 7.59 (d, J=8.0 Hz, 1H), 6.02-5.56 (m, 5H), 5.52 (d, J=11.2 Hz, 2H), 5.38-4.70 (m, 12H), 4.63 (d, J=14.0 Hz, 2H), 4.45 (t, J=7.0 Hz, 2H), 4.39 (d, J=1.7 Hz, 3H), 4.07 (s, 2H), 3.98 (s, 2H), 3.53 (s, 3H), 3.43 (s, 3H), 3.25 (s, 3H), 3.22 (s, 3H), 3.19 (s, 3H), 3.09 (s, 3H), 2.68 (s, 3H), 2.67 (s, 3H), 2.01 (s, 3H), 1.48 (s, 4H), 1.43-0.20 (m, 8H), 1.05-0.79 (m, 50H); ESI MS m/z 1399 [C72H123N11O16+H]+.
Example 60
Preparation of Cyclosporin Alkynyl Ester
A solution of the acetate of cyclosporin alkynyl ester from Example 59 (71 mg, 0.05 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (85 mg, 0.62 mmol) and was allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkynyl acid (28 mg, 41%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.93 (d, J=10.2 Hz, 1H), 7.59 (d, J=8.7 Hz, 1H), 7.48 (d, J=8.6 Hz, 1H), 7.28 (hidden by solvent peak, 1H), 6.24-6.10 (m, 2H), 5.90-5.66 (m, 2H), 5.45 (d, J=7.2 Hz, 2H), 5.41 (s, 2H), 5.18-4.97 (m, 7H), 4.83 (t, J=7.0 Hz, 1H), 4.74-4.66 (m, 2H), 5.52-4.39 (m, 6H), 4.35 (s, 2H), 4.26 (d, J=1.7 Hz, 1H), 4.19 (s, 3H), 4.14 (d, J=2.0 Hz, 1H), 3.89 (t, J=6.6 Hz, 1H), 3.48 (s, 3H), 3.38 (s, 3H), 3.23 (s, 3H), 3.11 (s, 3H), 3.10 (s, 3H), 2.69 (s, 6H), 1.54 (d, J=9.6 Hz, 1H), 1.46 (s, 1H), 1.38-1.25 (m, 5H), 1.06-0.74 (m, 49H); ESI MS m/z 1301 [C66H113N11O15+H]+; HPLC >99% (AUC), tR=17.09 min.
Example 61
Preparation of the Acetate of Cyclosporin Alkynyl Acid
A mixture of acetyl cyclosporin vinyl iodide from Example 3 (70 mg, 0.051 mmol), CuI (5 mg, 0.026 mmol), and PdCl2(PPh3)2 (18 mg, 0.026 mmol) in Et3N (3 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with 4-pentynoic acid (51 mg, 0.51 mmol). Reaction was allowed to stir for 4 h at room temperature. Solution was filtered through micro-filter and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkynyl acid (23 mg, 34%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.62 (d, J=7.7 Hz, 1H), 8.41 (d, J=9.4 Hz, 1H), 7.97 (d, J=6.8 Hz, 1H), 7.68 (d, J=7.2 Hz, 1H), 5.68 (dd, J=11.1, 3.8 Hz, 2H), 5.59 (d, J=7.6 Hz, 2H), 5.55 (s, 1H), 5.50 (d, J=6.5 Hz, 2H), 5.46-4.77 (m, 13H), 4.63 (d, J=13.4 Hz, 2H), 4.49 (t, J=7.3 Hz, 1H), 4.42 (t, J=6.9 Hz, 2H), 3.44 (s, 3H), 3.35 (s, 3H), 3.25 (s, 3H), 3.20 (s, 3H), 3.12 (s, 3H), 3.08 (s, 3H), 2.67 (s, 3H), 2.65 (s, 3H), 2.01 (s 2H), 1.36-1.18 (m, 10H), 1.06-0.78 (m, 50H); ESI MS m/z 1327 [C68H115N11O15+H]+.
Example 62
Preparation of Cyclosporin Alkynyl Acid
A solution of the acetate of cyclosporin alkynyl acid from Example 61 (23 mg, 0.017 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (30 mg, 0.22 mmol) and was allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkynyl acid (11 mg, 50%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.94 (d, J=9.4 Hz, 1H), 7.57 (d, J=7.2 Hz, 1H), 7.48 (d, J=8.4 Hz, 1H), 7.28 (hidden by solvent peak, 1H), 6.03-5.66 (m, 3H), 5.46 (d, J=6.1 Hz, 2H), 5.38 (d, J=16.0 Hz, 1H), 5.31 (d, J=8.8 Hz, 1H), 5.10 (d, J=10.8 Hz, 2H), 5.06-4.67 (m, 17H), 4.49 (t, J-=7.1 Hz, 2H), 3.81 (t, J=6.5 Hz, 2H), 3.48 (s, 3H), 3.38 (s, 3H), 3.24 (s, 3H), 3.10 (s, 3H), 3.09 (s, 3H), 2.69 (s, 6H), 2.60(s, 3H), 1.35 (d, J=7.2 Hz, 2H), 1.26 (d, J=6.4 Hz, 2H), 1.07-0.79 (m, 49H), 0.70 (d, J 6.4 Hz, 2H); ESI MS m/z 1285 [C66H113N11O14+H]+; HPLC >99% (AUC), tR=17.39 min.
Example 63
Preparation of Cyclosporin Alkynyl Acid
Cyclosporin alkynyl aldehyde from Example 22 (28 mg, 0.02 mmol) was dissolved in acetonitrile (1 mL) and stirred at room temperature under N2 atmosphere. Reaction was treated with 40% NaH2PO4 solution in water (1 mL). Next the mixture was treated with NaClO2 (3 mg, 0.03 mmol) and H2O2 (35% in water, 3 μL, 0.03 mmol). Reaction mixture was stirred for 1 h. Reaction was quenched with sodium sulfite (100 mg). Mixture was diluted with ethyl acetate and washed with 1 N HCl. Organic layer was washed with water and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product (28 mg, 100%) was carried forward without purification. A solution of the crude product (28 mg, 0.021 mmol) in methanol (1.5 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (100 mg, 0.72 mmol) and was allowed to keep stirring under N2 atmosphere for 4 h. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cyclosporin alkynyl acid (3.5 mg, 13%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.89 (d, J=8.1 Hz, 1H), 7.65 (br s, 1H), 7.39 (br s, 1H), 7.30 (d, J=7.6 Hz, 1H), 6.33-6.22 (m, 2H), 5.69 (d, J=10.7 Hz, 2H), 5.60 (d, J=16.0 Hz, 1H), 5.34 (d, J=6.8 Hz, 2H), 5.12-4.64 (m, 15H), 4.46 (t, J=7.0 Hz, 2H), 4.08 (d, J=6.8 Hz, 2H), 3.50 (s, 3H), 3.39(s, 3H), 3.23 (s, 3H), 3.15 (s, 3H), 3.09 (s, 3H), 2.69 (s, 3H), 2.68 (s, 3H), 1.38 (d, J=7.3 Hz, 3H), 1.32 (d, J=7.3 Hz, 3H), 1.27-0.81 (m, 52H); ESI MS m/z 1257 [C64H109N11O14+H]+; HPLC 83.4% (AUC), tR=17.48 min.
Example 64
Preparation of the Acetate of cis-Cyclosporin Vinyl Iodide
To a vigorously stirred suspension of (iodomethyl)triphenylphosphonium iodide (1.3 g, 2.4 mmol) in dry THF (18 mL) under nitrogen, was added sodium bis(trimethylsilyl)amide (2.4 mL, 1 M in THF, 2.4 mmol). After 10 min at room temperature, the mixture was cooled to 0° C. and acetyl cyclosporin aldehyde from Example 2 (300 mg, 0.240 mmol) in anhydrous THF (10 mL) was added dropwise. After 10 min at 0° C., the reaction was quenched with a saturated solution of ammonium chloride (10 mL), and then allowed to warm to room temperature. The resulting solid was filtered off through a plug of diatomaceous earth and washed with ethyl acetate (200 mL). The organic layer was washed with an aqueous solution of sodium hydrogensulfite (20%, 200 mL), then dried over anhydrous sodium sulfate and concentrated under vacuum to afford crude product (540 mg). The material was purified by semi-preparative HPLC to afford the acetate of the cis-isomer of cyclosporin vinyl iodide (150 mg, 46%) as a pale-brown oil: 1H NMR (300 MHz, CDCl3) δ 8.53 (d, J=9.8 Hz, 1H), 8.15 (d, J=6.5 Hz, 1H), 7.82 (d, J=9.0 Hz, 1H), 7.63 (d, J=8.2 Hz, 1H), 6.10 (d, J=7.4 Hz, 1H), 6.02-5.94 (m, 1H), 5.69 (dd, J=10.9, 3.8 Hz, 1H), 5.61-5.48 (m, 2H), 5.38-5.13 (m, 3H), 4.98 (d, J=10.9 Hz, 2H), 4.87 (t, J=7.4 Hz, 1H), 4.78 (t, J=9.6 Hz, 1H), 4.63 (d, J=14.2 Hz, 1H), 4.47 (t, J=7.0 Hz, 1H), 3.98 (s, 3H), 3.43 (s, 3H), 3.27 (s, 3H), 3.21 (s, 3H), 3.19 (s, 3H), 3.14 (s, 3H), 2.69 (s, 3H), 2.42-2.30 (m, 1H), 2.22-1.85 (m, 8H), 2.06 (s, 3H), 1.77-1.60 (m, 3H), 1.54.75 (m, 56H); ESI MS m/z 1357 [C63H110IN11O13+H]+.
Example 65
Preparation of the Acetate of cis-Cyclosporin Alkyne
A mixture of the acetate of cis-cyclosporin vinyl iodide from Example 64 (100 mg, 0.073 mmol), CuI (7 mg, 0.037 mmol), and PdCl2(PPh3)2 (26 mg, 0.037 mmol) in Et3N (3 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with (trimethylsilyl)acetylene (72 mg, 0.737 mmol). Reaction was stirred overnight at room temperature. Solution was filtered through a short pad of silica gel and then filtrate was concentrated under reduced pressure. The crude product was purified by semi-preparative HPLC to afford the acetate of cis-cyclosporin alkyne (27 mg, 28%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.40 (d, J=9.7 Hz, 1H), 7.86 (d, J=6.0 Hz, 1H), 7.59 (d, J=9.1 Hz, 1H), 7.37 (d, J=7.6 Hz, 1H), 5.60-5.40 (m, 4H), 5.23 (d, J=11.3 Hz, 1H), 5.15-4.95 (m, 3H), 4.85-4.75 (m, 1H), 4.68 (t, J=7.0 Hz, 1H), 4.64 (t, J=9.5 Hz, 1H), 4.48 (d, J=13.9 Hz, 1H), 4.28 (t, J=7.0 Hz, 1H), 3.27 (s, 3H), 3.10 (s, 3H), 3.06 (s, 3H), 3.01 (s, 3H), 2.95 (s, 3H), 2.52 (s, 3H), 2.51 (s, 3H), 2.30-0.60 (m, 72H), 0.01 (s, 9H); ESI MS m/z 1327 [C68H119N11O13Si+H].
Example 66
Preparation of cis-Cyclosporin Alkyne
A solution of acetate of cis-cyclosporin alkyne from Example 65 (27 mg, 0.020 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (12 mg, 0.087 mmol) and allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cis-cyclosporin alkyne (12 mg, 48%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 8.03 (d, J=9.7 Hz, 1H), 7.64 (d, J=7.2 Hz, 1H), 7.48 (d, J=8.4 Hz, 1H), 7.25 (d, J=7.8 Hz, 1H), 6.10-5.95 (m, 1H), 5.68 (dd, J=11.2, 4.2 Hz, 1H), 5.60-5.50 (m, 1H), 5.45-5.40 (m, 2H), 5.35-5.25 (m, 2H), 5.13-4.95 (m, 2H), 4.85 (t, J=6.9 Hz, 1H), 4.75-4.60 (m, 2H), 4.50 (t, J=7.3 Hz, 1H), 3.93 (t, J=6.7 Hz, 1H), 3.52 (s, 3H), 3.40 (s, 3H), 3.24 (s, 3H), 3.12 (s, 3H), 3.11 (s, 3H), 2.69 (s, 6H), 2.50-2.40 (m, 2H), 2.20-0.8 (m, 68H); ESI MS m/z 1213 [C63H109N11O12+H]+; HPLC >99% (AUC), tR=18.94 min.
Example 67
Preparation of the Acetate of cis-Cyclosporin Alkyne
To a solution of 1-propynlmagnesium bromide (0.5 M solution in THF, 1.01 mL, 0.55 mmol) in THF (2 mL) was added ZnCl2 (1.0 M solution in ether, 0.55 mL, 0.55 mmol) dropwise at 0° C. The resulting solution was stirred for 5 min at 0° C. Then ice-bath was removed and reaction mixture was allowed to warm to room temperature. A solution of the acetate of cis-cyclosporin vinyl iodide from Example 64 (75 mg. 0.055 mmol) in THF (1 mL) was added followed by the addition of PdCl2(PPh3)2 (19 mg, 0.027 mmol) and the reaction mixture was stirred at room temperature under argon atmosphere overnight. Reaction mixture was concentrated under reduced pressure, diluted with ethyl acetate and filtered through a short pad of silica gel, the filtrate was then concentrated under reduced pressure. The crude product was purified by semi-preparative HPLC to afford the acetate of cis-cyclosporin alkyne (47 mg, 67%) as a brown solid: 1H NMR (500 MHz, CDCl3) δ 8.56 (d, J=9.7 Hz, 1H), 8.02 (d, J=6.8 Hz, 1H), 7.65 (d, J=9.2 Hz, 1H), 7.52 (d, J=7.7 Hz, 1H), 5.70-5.50 (m, 4H), 5.30-5.10 (m, 3H), 5.00-4.90 (m, 2H), 4.85 (t, J=7.3 Hz, 1H), 4.76 (t, J=9.6 Hz, 1H), 4.63 (d, J=13.9 Hz, 1H), 4.43 (t, J=7.03 Hz, 1H), 3.41 (s, 3H), 3.27 (s, 3H), 3.22 (s, 3H), 3.20 (s, 3H), 3.10 (s, 3H), 2.68 (s, 3H), 2.67 (s, 3H), 2.45-2.35 (m, 1H), 2.30-0.65 (m, 74H); ESI MS m/z 1269 [C66H113N11O13+H]+.
Example 68
Preparation of cis-Cyclosporin Alkyne
A solution of the acetate of cis-cyclosporin alkyne from Example 67 (37 mg, 0.02 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (30 mg, 0.21 mmol) and allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford cis-cyclosporin alkyne (15 mg, 45%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 8.09 (d, J=9.8 Hz, 1H), 7.68 (d, J=7.2 Hz, 1H), 7.52 (d, J=8.4 Hz, 1H), 7.30 (d, J=7.8 Hz, 1H), 5.85-5.75 (m, 1H), 5.68 (dd, J=10.7, 3.9 Hz, 1H), 5.43 (d, J=7.4 Hz, 1H), 5.38 (d, J=10.0 Hz, 1H), 5.30 (dd, J=11.6, 4.2 Hz, 1H), 5.15-4.95 (m, 4H), 4.82 (t, J=7.2 Hz, 1H), 4.75-4.65 (m, 2H), 4.50 (t, J=7.2 Hz, 1H), 3.94 (t, J=6.8 Hz, 1H), 3.51 (s, 3H), 3.41 (s, 3H), 3.24 (s, 3H), 3.12 (s, 3H), 3.10 (s, 3H), 2.69 (s, 6H), 2.50-0.81 (m, 72H); ESI MS m/z 1227 [C64H111N11O12+H]+; HPLC 98.7% (AUC), tR=19.90 min.
Example 69
Preparation of the Acetates of cis- and trans-Deuterated Cyclosporin Vinyl Iodide
A mixture of acetyl cyclosporin aldehyde from Example 2 (500 mg, 0.40 mmol) and iodoform-d (1.35 g, 4.0 mmol) in anhydrous THF (10 mL) was cooled to −78° C. After cooling, chromium chloride (1.0 g, 8.0 mmol) was quickly added to the reaction. Mixture was allowed to warm to 0° C. and stirred under N2 atmosphere for 5 h. Mixture was poured into ice-water (300 mL) and extracted with ethyl acetate (3×200 mL). Combined organic layers were washed with brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of trans-deuterated cyclosporin vinyl iodide (220 mg, 40%) as a light brown solid: 1H NMR (300 MHz, CDCl3) δ 8.47 (d, J=9.6 Hz, 1H), 8.01 (d, J=6.8 Hz, 1H), 7.57 (t, J=8.6 Hz, 2H), 6.44 (dd, J=8.6, 6.1 Hz, 2H), 6.01-5.56 (m, 4H), 5.52 (d, J=10.3 Hz, 2H), 5.28 (d, J=3.4 Hz, 1H), 5.24 (d, J=3.4 Hz, 1H), 4.97 (d, J=10.9 Hz, 3H), 4.85-4.76 (m, 5H), 4.64 (d, J=13.9 Hz, 2H), 4.43 (t, J=7.0 Hz, 2H), 3.43 (s, 3H), 3.25 (s, 3H), 3.24 (s, 3H), 3.20 (s, 3H), 3.11 (s, 3H), 2.67 (s, 3H), 2.66 (s, 3H), 2.01 (s, 2H), 1.32 (d, J=7.1 Hz, 4H), 1.28 (d, J=6.9 Hz, 4H), 1.06-0.74 (m, 52H); ESI MS m/z 1357 [C63H109DIN11O13+H]+; and the acetate of cis-deuterated cyclosporin vinyl iodide (40 mg, 7%) as a light brown solid: 1H NMR (300 MHz, CDCl3) δ 8.57 (d, J=9.6 Hz, 1H), 8.02 (d, J=6.8 Hz, 1H), 7.66 (d, J=9.0 Hz, 1H), 7.53 (d, J=7.7 Hz, 1H), 6.02-5.92 (m, 2H), 5.69 (dd, J=11.0, 3.9 Hz, 1H), 5.54 (d, J=3.9 Hz, 3H), 5.33-5.13 (m, 5H), 4.98 (d, J=11.1 Hz, 3H), 4.82 (t, J=7.3 Hz, 2H), 4.74 (t, J=9.5 Hz, 2H), 4.64 (d, J=13.8 Hz, 2H), 4.32 (t, J=7.0 Hz, 2H), 3.44 (s, 3H), 3.28 (s, 3H), 3.25 (s, 3H), 3.20 (s, 3H), 3.11 (s, 3H), 2.67 (s, 3H), 2.66 (s, 3H), 2.05 (s, 2H), 1.29 (d, J=5.5 Hz, 4H), 1.24 (d, J=11.9 Hz, 4H), 1.05 (d, J=6.4 Hz, 2H), 1.02-0.64 (m, 50H); ESI MS m/z 1357 [C63H109DIN11O13+H]+.
Example 70
Preparation of the Acetate of trans-Deuterated Cyclosporin Alkyne
A mixture of the acetate of trans-deuterated cyclosporin vinyl iodide from Example 69 (75 mg, 0.055 mmol), CuI (5 mg, 0.028 mmol), and PdCl2(PPh3)2 (19 mg, 0.028 mmol) in Et3N (3 mL) was stirred at room temperature under N2 atmosphere. Reaction mixture was then treated with (trimethylsilyl)acetylene (54 mg, 0.55 mmol). Reaction was allowed to stir for 4 h at room temperature. Solution was filtered through micro-filter and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of trans-deuterated cyclosporin alkyne (45 mg, 61%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.21 (d, J=9.2 Hz, 1H), 7.88 (d, J=6.6 Hz, 1H), 7.71 (d, J=9.0 Hz, 1H), 7.47 (d, J=7.6 Hz, 1H), 5.80 (t, J=7.3 Hz, 1H), 5.56-5.35 (m, 3H), 5.29 (d, J=10.8 Hz, 2H), 5.17-4.97 (m, 3H), 4.88 (d, J=10.3 Hz, 3H), 4.86-4.45 (m, 5H), 4.31 (t, J=6.8 Hz, 2H), 3.91 (d, J=16.3 Hz, 1H), 3.80 (s, 3H), 3.25 (s, 3H), 3.08 (s, 3H), 3.05 (s, 3H), 3.01 (s, 3H), 2.93 (s, 3H), 2.53 (s, 3H), 2.51 (s, 3H), 1.85 (s, 1H), 1.81 (s, 2H), 1.21-1.08 (m, 8H), 0.89-0.54 (m, 50H), 0.10 (s, 9H); ESI MS m/z 1328 [C68H118DN11O13Si+H]+.
Example 71
Preparation of trans-Deuterated Cyclosporin Alkyne
A solution of acetate of trans-deuterated cyclosporin alkyne from Example 70 (44 mg, 0.033 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (55 mg, 0.40 mmol) and was allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford trans-deuterated cyclosporin alkyne (29 mg, 72%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.93 (d, J=9.8 Hz, 1H), 7.64 (d, J=7.3 Hz, 1H), 7.46 (d, J=8.3 Hz, 1H), 7.19 (d, J=7.8 Hz, 1H), 5.99 (t, J=7.7 Hz, 2H), 5.70 (dd, J=1.1, 4.1 Hz, 1H), 5.49 (d, J=6.0 Hz, 2H), 5.31 (dd, J=10.9, 3.7 Hz, 1H), 5.13-4.62 (m, 16H), 4.52 (t, J=7.3 Hz, 2H), 3.79 (t, J=6.5 Hz, 2H), 3.50 (s, 3H), 3.38 (s, 3H), 3.25 (s, 3H), 3.10 (s, 6H), 2.70 (s, 3H), 2.69 (s, 3H), 1.91 (s, 2H), 1.35 (d, J=7.2 Hz, 2H), 1.26 (d, J=5.0 Hz, 2H), 1.08-0.81 (m, 50H), 0.71 (d, J=6.1 Hz, 1H); ESI MS m/z 1214 [C63H108DN11O12+H]+; HPLC >99% (AUC), tR=18.82 min.
Example 72
Preparation of the Acetate of trans-Deuterated Cyclosporin Alkyne
ZnCl2 (0.6 mL, 1 M in THF, 0.6 mmol) was added to a solution of 1-propynylmagnesium bromide (1.2 mL, 0.5 M in THF, 0.6 mmol) in THF (3 mL) at 0° C. Mixture was stirred under N2 atmosphere for 5 min. Mixture was warmed to room temperature and then treated with the acetate of trans-deuterated cyclosporin vinyl iodide from Example 69 (80 mg, 0.060 mmol) and PdCl2(PPh3)2 (20 mg, 0.030 mmol). Mixture stirred for 4 h under N2 atmosphere at room temperature. Solution was filtered through micro-filter and then concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford the acetate of trans-deuterated cyclosporin alkyne (62 mg, 83%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 8.44 (d, J=9.3 Hz, 1H), 8.04 (d, J=6.7 Hz, 1H), 7.98 (d, J=9.2 Hz, 1H), 7.64 (d, J=7.7 Hz, 1H), 5.83-5.43 (m, 7H), 5.28 (d, J=3.3 Hz, 1H), 5.24 (d, J=3.3 Hz, 1H), 5.18 (d, J=5.7 Hz, 2H), 5.06-4.70 (m, 10H), 4.64 (d, J=14.2 Hz, 1H), 4.46 (t, J=6.9 Hz, 2H), 3.42 (s, 3H), 3.24 (s, 3H), 3.22 (s, 3H), 3.19 (s, 3H), 3.11 (s, 3H), 2.69 (s, 3H), 2.68 (s, 3H), 2.01 (s, 2H), 1.91 (s, 1H), 1.31 (dd, J=10.8, 7.2 Hz, 6H), 1.04 (d, J=6.5 Hz, 2H), 1.01-0.70 (m, 52H); ESI MS m/z 1270 [C66H112DN11O13+H]+.
Example 73
Preparation of trans-Deuterated Cyclosporin Alkyne
A solution of the acetate of trans-deuterated cyclosporine alkyne from Example 72 (62 mg, 0.049 mmol) in methanol (2 mL) was stirred at room temperature. Reaction mixture was treated with potassium carbonate (70 mg, 0.50 mmol) and was allowed to keep stirring under N2 atmosphere overnight. Mixture was diluted with ethyl acetate, washed with saturated sodium bicarbonate solution and brine, dried over sodium sulfate, and concentrated in vacuo. The crude product was purified by semi-preparative HPLC to afford trans-deuterated cyclosporine alkyne (31 mg, 52%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.92 (d, J=9.7 Hz, 1H), 7.63 (d, J=7.3 Hz, 1H), 7.44 (d, J=8.2 Hz, 1H), 7.20 (d, J=7.8 Hz, 1H), 6.23 (t, J=7.3 Hz, 1H), 5.49 (d, J=6.0 Hz, 2H), 5.31 (dd, J=10.7, 3.4 Hz, 1H), 5.11-4.62 (m, 20H), 4.52 (t, J=7.2 Hz, 2H), 3.82 (t, J=6.5 Hz, 2H), 3.51 (s, 3H), 3.38 (s, 3H), 3.25 (s, 3H), 3.11 (s, 3H), 3.10 (s, 3H), 2.70 (s, 3H), 2.68 (s, 3H), 1.34 (d, J=7.2 Hz, 2H), 1.26 (d, J=4.8 Hz, 2H), 1.08-0.81 (m, 52H), 0.73 (d, J=6.4 Hz, 1H); ESI MS m/z 1228 [C64H110DN11O12+H]+; HPLC >99% (AUC), tR=19.47 min.
Example 74
Preparation of Cyclosporin Diol
To a mechanically stirred solution of diisopropylamine (2.6 mL, 18 mmol) in THF (50 mL) at −78° C. was added dropwise n-butyllithium (6.6 mL, 2.5 M in hexane, 17 mmol), then the mixture was stirred for 0.5 h. A solution of cyclosporin A (1.0 g, 0.83 mmol) in THF (8 mL) was added, and then the mixture was stirred for 2 h at −78° C. Paraformaldehyde (8.0 g) was heated to 170° C. and the resulting formaldehyde gas was transferred into the reaction via a glass tube which was wrapped with cotton and aluminum foil over 2 h. After stirred another 1 h at −78° C., the reaction mixture was quenched with water (10 mL). The mixture was allowed to warm to room temperature, diluted with ethyl acetate (150 mL) and washed with water (2×50 mL). The organic layer was separated, dried over anhydrous sodium sulfate and concentrated under vacuum. The crude material was purified by semi-preparative HPLC to afford cyclosporin diol (0.45 g, 44%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 8.09 (d, J=9.9 Hz, 1H), 7.70 (d, J=7.4 Hz, 1H), 7.57 (d, J=8.2 Hz, 1H), 7.15 (overlapped with CHCl3, 1H), 5.70 (dd, J=11.0, 4.0 Hz, 1H), 5.49 (d, J=6.4 Hz, 1H), 5.38-5.30 (m, 3H), 5.16-4.93 (m, 5H), 4.83 (t, J=7.2 Hz, 1H), 4.65 (t, J=9.5 Hz, 1H), 4.54 (t, J=7.2 Hz, 1H), 4.05 (d, J=6.8 Hz, 2H), 3.73 (t, J=6.3 Hz, 1H), 3.49 (s, 3H), 3.30 (s, 3H), 3.25 (s, 3H), 3.15 (s, 3H), 3.11 (s, 3H), 2.70 (s, 3H), 2.69 (s, 3H), 2.50-2.38 (m, 2H), 2.20-1.92 (m, 6H), 1.75-0.65 (m, 64H); ESI MS m/z 1233 [C63H113N11O13+H]+.
Example 75
Preparation of Cyclosporin Diacetate
To a solution of cyclosporin diol from Example 74 (0.43 g, 0.35 mmol) in methylene chloride (5 mL) was added pyridine (0.57 mL, 7.0 mmol) followed by 4-(dimethylamino)pyridine (86 mg, 0.70 mmol) and acetic anhydride (1.0 mL, 10.5 mmol). The reaction mixture was stirred for 2 d at room temperature. The reaction was diluted with ethyl ether (150 mL), washed with a saturated solution of sodium bicarbonate (30 mL), 1N HCl solution (30 mL) and brine (30 mL). The organic layer was separated, dried over anhydrous sodium sulfate and concentrated under vacuum. The crude material was purified by semi-preparative HPLC to afford cyclosporin diacetate (0.23 g, 50%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 8.60 (d, J=9.8 Hz, 1H), 8.05 (d, J=6.6 Hz, 1H), 7.55 (d, J=7.8 Hz, 1H), 7.49 (d, J=9.3 Hz, 1H), 5.68 (dd, J=11.0, 4.0 Hz, 1H), 5.49 (s, 2H), 5.40-4.95 (m, 8H), 4.85 (t, J=7.5 Hz, 1H), 4.76 (t, J=9.3 Hz, 1H), 4.58-4.34 (m, 3H), 3.37 (s, 3H), 3.27 (s, 3H), 3.23 (s, 3H), 3.20 (s, 3H), 3.14 (s, 3H), 2.67 (s, 3H), 2.66 (s, 3H), 2.48-2.35 (m, 1H), 2.10 (s, 3H), 2.01 (s, 3H), 1.98-1.85 (m, 2H), 1.75-0.65 (m, 67H); ESI MS m/z 1317 [C67H117N11O15+H]+.
Example 76
Preparation of Cyclosporin Aldehyde
Ozone was bubbled into a solution of cyclosporin diacetate from Example 75 (0.22 g, 0.17 mmol) in methylene chloride (10 mL) at −78° C. until a blue color was developed. The mixture was degassed with nitrogen for a few min and dimethylsulfide (0.4 mL) was added at −78° C. The reaction mixture was allowed to warm to room temperature and stirred for 3 h. The reaction mixture was concentrated in vacuo and the residue was dissolved in ethyl acetate (120 mL), washed with water (2×20 mL) and brine (30 mL), dried over sodium sulfate, filtered, and concentrated in vacuo to afford cyclosporin aldehyde (0.19 g, 86%) as a white solid. The crude was carried to the next step without further purification: 1H NMR (300 MHz, CDCl3) δ 9.55 (d, J=3.4 Hz, 1H), 8.60 (d, J=9.9 Hz, 1H), 7.96 (d, J=7.1 Hz, 1H), 7.53 (d, J=7.7 Hz, 1H), 7.33 (d, J=9.1 Hz, 1H), 5.68 (dd, J=1.0, 4.0 Hz, 1H), 5.53 (d, J=11.2 Hz, 1H), 5.47 (d, J=11.2 Hz, 1H), 5.30 (dd, J=12.3, 3.6 Hz, 1H), 5.18-4.92 (m, 5H), 4.84 (t, J=6.9 Hz, 1H), 4.72 (t, J=9.6 Hz, 1H), 4.55-4.35 (m, 3H), 3.39 (s, 3H), 3.30 (s, 3H), 3.29 (s, 3H), 3.21 (s, 3H), 3.12 (s, 3H), 2.66 (s, 3H), 2.65 (s, 3H), 2.48-2.30 (m, 3H), 2.10 (s, 3H), 1.99 (s, 3H), 1.80-0.75 (m, 64H); ESI MS m/z 1305 [C65H113N11O6+H]+.
Example 77
Preparation of the Acetates of cis- and trans-Cyclosporin Vinyl Iodide
To an ice-cooled suspension of chromium(II) chloride (664 mg, 5.4 mmol) in THF (7 mL) was added a solution of cyclosporin aldehyde from Example 76 (0.35 g, 0.27 mmol) and iodoform (850 mg, 2.16 mmol) in THF (7 mL), then the mixture was stirred at 0° C. After 4 h, the reaction mixture was poured into ice-water (40 mL). The aqueous layer was separated and extracted with ethyl acetate (3×50 mL). The combined organics were dried over anhydrous sodium sulfate and concentrated under vacuum. The crude was purified by semi-preparative HPLC to afford the acetate of cis-cyclosporin vinyl iodide (26 mg, 7%): 1H NMR (CDCl3, 300 MHz) δ 8.62 (d, J=9.6 Hz, 1H), 8.02 (d, J=6.9 Hz, 1H), 7.60 (d, J=7.5 Hz, 1H), 7.55 (d, J=9.3 Hz, 1H), 6.07 (d, J=7.4 Hz, 1H), 6.02-5.92 (m, 1H), 5.69 (dd, J=11.1, 3.9 Hz, 1H), 5.50 (dd, J=15.6, 11.7 Hz, 2H), 5.30-4.93 (m, 6H), 4.85 (t, J=7.2 Hz, 1H), 4.74 (t, J=9.3 Hz, 1H), 4.55-4.32 (m, 3H), 3.36 (s, 3H), 3.29 (s, 3H), 3.23 (s, 3H), 3.20 (s, 3H), 3.14 (s, 3H), 2.67 (s, 6H), 2.43-2.32 (m, 1H), 2.23-2.15 (m, 2H), 2.10 (s, 3H), 2.06 (s, 3H), 1.95-1.82 (m, 3H), 1.75-1.60 (m, 3H), 1.48-0.82 (m, 58H); ESI MS m/z 1429 [C66H114IN11O15+H]+; the acetate of trans-cyclosporin vinyl iodide (0.18 g, 47%): 1H NMR (CDCl3, 300 MHz) δ 8.54 (d, J=9.9 Hz, 1H), 8.00 (d, J=6.6 Hz, 1H), 7.58 (d, J=7.5 Hz, 1H), 7.43 (d, J=9.0 Hz, 1H), 6.45-6.35 (m, 1H), 5.83 (d, J=14.4 Hz, 1H), 5.69 (dd, J=10.8, 3.9 Hz, 1H), 5.55-5.43 (m, 2H), 5.38 (dd, J=12.0, 3.9 Hz, 1H), 5.30-4.93 (m, 5H), 4.85 (t, J=6.9 Hz, 1H), 4.77 (t, J=9.6 Hz, 1H), 4.53-4.30 (m, 3H), 3.36 (s, 3H), 3.27 (s, 3H), 3.26 (s, 3H), 3.20 (s, 3H), 3.15 (s, 3H), 2.67 (s, 3H), 2.66 (s, 3H), 2.43-2.32 (m, 1H), 2.23-2.11 (m, 2H), 2.10 (s, 3H), 2.02 (s, 3H), 1.95-1.60 (m, 6H), 1.48-0.75 (m, 58H); ESI MS m/z 1429 [C66H114IN11O15+H]+.
Example 78
Preparation of the Acetate of Cyclosporin Alkyne
To a mixture of the acetate of trans-cyclosporin vinyl iodide from Example 77 (60 mg, 0.042 mmol), copper(I) iodide (4 mg, 0.021 mmol), dichlorobis(triphenylphosphine)palladium(II) (15 mg, 0.021 mmol) in triethylamine (2 mL) was added (trimethylsilyl)acetylene (60 μL, 0.42 mmol), then the mixture was stirred at room temperature for 3 h. The reaction mixture was filtered through a micro-filter and concentrated under vacuum. The crude was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkyne (16 mg, 28%) as a white solid: 1H NMR (CDCl3, 300 MHz) δ 8.53 (d, J=9.3 Hz, 1H), 8.06 (d, J=6.6 Hz, 1H), 7.68 (app t, J=8.7 Hz, 2H), 6.02 (dt, J=15.9, 7.5 Hz, 1H), 5.70 (dd, J=10.8, 3.9 Hz, 1H), 5.55-5.37 (m, 2H), 5.35-5.13 (m, 4H), 5.06-4.93 (m, 4H), 4.87 (t, J=7.2 Hz, 1H), 4.75 (t, J=9.3 Hz, 1H), 4.53-4.33 (m, 4H), 3.38 (s, 3H), 3.27 (s, 3H), 3.24 (s, 3H), 3.19 (s, 3H), 3.12 (s, 3H), 2.69 (s, 3H), 2.68 (s, 3H), 2.43-2.32 (m, 1H), 2.23-2.11 (m, 2H), 2.11 (s, 3H), 2.01 (s, 3H), 1.95-1.60 (m, 6H), 1.48-0.75 (m, 56H), 0.17 (s, 9H); ESI MS m/z 1399 [C71H123N11O5Si+H]+.
Example 79
Preparation of Cyclosporin Alkyne
To a solution of the acetate of cyclosporin alkyne from Example 78 (16 mg, 0.011 mmol) in MeOH (2 mL) was added potassium carbonate (46 mg, 0.33 mmol), then the mixture was stirred at room temperature. After 12 h, the reaction mixture was quenched with a saturated solution of ammonium chloride (10 mL). The aqueous layer was extracted with ethyl acetate (3×20 mL). The combined organics were dried over anhydrous sodium sulfate and concentrated under vacuum. The crude material was purified by semi-preparative HPLC to afford cyclosporin alkyne (8 mg, 57%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 8.07 (d, J=9.9 Hz, 1H), 7.68 (d, J=8.4 Hz, 1H), 7.45 (d, J=8.1 Hz, 1H), 7.20 (d, J=7.8 Hz, 1H), 6.28-6.15 (m, 1H), 5.70 (dd, J=10.8, 3.6 Hz, 1H), 5.50 (d, J=6.6 Hz, 1H), 5.39 (d, J=15.3 Hz, 1H), 5.30 (dd, J=11.7, 3.6 Hz, 1H), 5.12-4.92 (m, 5H), 4.84 (t, J=6.9 Hz, 1H), 4.66 (t, J=9 Hz, 1H), 4.51 (t, J=7.2 Hz, 1H), 4.04 (d, J=6.6 Hz, 2H), 3.76 (t, J=6.0 Hz, 1H), 3.51 (s, 3H), 3.31 (s, 3H), 3.27 (s, 3H), 3.15 (s, 3H), 3.11 (s, 3H), 2.69 (s, 3H), 2.68 (s, 3H), 2.55-2.38 (m, 5H), 2.20-1.90 (m, 6H), 1.80-1.60 (m, 5H), 1.45-0.75 (m, 54H); ESI MS m/z 1243 [C64H111N11O13+H]+; HPLC 96.2% (AUC), tR=13.18 min.
Example 80
Preparation of the Acetate of Cyclosporin Alkyne
To an ice-cooled solution of 1-(trimethylsilyl)-1-propyne-d3 (49 mg, 0.42 mmol) in triethylamine (2 mL) was added tetrabutylammonium fluoride (0.5 mL, 1 M in THF, 0.5 mmol), then the mixture was stirred for 10 min. The reaction mixture was allowed to warm to room temperature, then the solution was transferred into a mixture of the acetate of trans-cyclosporin vinyl iodide from Example 77 (60 mg, 0.042 mmol), copper(I) iodide (4 mg, 0.021 mmol), dichlorobis(triphenylphosphine)palladium(II) (15 mg, 0.021 mmol). The resulting reaction mixture was stirred at room temperature for 3 h. The reaction mixture was filtered through a micro-filter and concentrated under vacuum. The crude was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkyne (47 mg, 84%) as a white solid: 1H NMR (CDCl3, 300 MHz) δ 8.56 (d, J=9.9 Hz, 1H), 8.04 (d, J=6.6 Hz, 1H), 7.68 (d, J=7.5 Hz, 1H), 7.60 (d, J=9.3 Hz, 1H), 5.88-5.77 (m, 1H), 5.70 (dd, J=10.8, 3.9 Hz, 1H), 5.57-5.42 (m, 2H), 5.40 (dd, J=12.0, 3.9 Hz, 1H), 5.30-5.20 (m, 2H), 5.17 (t, J=7.5 Hz, 1H), 5.05-4.94 (m, 3H), 4.90-4.75 (m, 2H), 4.57-4.35 (m, 3H), 3.37 (s, 3H), 3.26 (s, 3H), 3.24 (s, 3H), 3.19 (s, 3H), 3.14 (s, 3H), 2.68 (s, 6H), 2.45-2.37 (m, 1H), 2.30-2.12 (m, 2H), 2.11 (s, 3H), 2.02 (s, 3H), 1.95-1.65 (m, 6H), 1.48-0.75 (m, 58H); ESI MS m/z 1344 [C69H114D3N11O15+H]+.
Example 81
Preparation of Cyclosporin Alkyne
To a solution of the acetate of cyclosporin alkyne from Example 80 (45 mg, 0.033 mmol) in MeOH (3 mL) was added potassium carbonate (137 mg, 0.99 mmol), then the mixture was stirred at room temperature. After 12 h, the reaction mixture was quenched with a saturated solution of ammonium chloride (15 mL). The aqueous layer was extracted with ethyl acetate (3×30 mL). The combined organics were dried over anhydrous sodium sulfate and concentrated under vacuum. The crude material was purified by semi-preparative HPLC to afford cyclosporin alkyne (24 mg, 57%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 8.07 (d, J=9.6 Hz, 1H), 7.68 (d, J=7.2 Hz, 1H), 7.47 (d, J=8.1 Hz, 1H), 7.20 (d, J=8.1 Hz, 1H), 6.05-5.95 (m, 1H), 5.70 (dd, J=10.8, 3.6 Hz, 1H), 5.50 (d, J=6.6 Hz, 1H), 5.35 (d, J=16.2 Hz, 1H), 5.30 (dd, J=11.7, 3.6 Hz, 1H), 5.12-4.90 (m, 5H), 4.83 (t, J=6.9 Hz, 1H), 4.65 (t, J=9.0 Hz, 1H), 4.54 (t, J=7.2 Hz, 1H), 4.04 (d, J=6.6 Hz, 2H), 3.72 (t, J=6.3 Hz, 1H), 3.50 (s, 3H), 3.30 (s, 3H), 3.27 (s, 3H), 3.14 (s, 3H), 3.11 (s, 3H), 2.70 (s, 3H), 2.69 (s, 3H), 2.55-2.35 (m, 2H), 2.20-1.90 (m, 5H), 1.80-1.58 (m, 6H), 1.45-0.75 (m, 56H); ESI MS m/z 1260 [C65H110D3N11O13+H]+; HPLC >99% (AUC), tR=13.48 min.
Example 82
Preparation of the Acetate of Cyclosporin Alkyne
To an ice-cooled solution of 1-propynylmagnesium bromide (0.76 mL, 0.5 M in THF, 0.38 mmol) in THF (1 mL) was added a solution of zinc chloride (0.38 mL, 1 M in ethyl ether, 0.38 mmol). The reaction was stirred at 0° C. for 10 min, and then allowed to warm to room temperature. A solution of the acetate of trans-cyclosporin vinyl iodide from Example 77 (54 mg, 0.038 mmol) in THF (2 mL) was added into the reaction mixture followed by copper(I) iodide (2 mg, 0.008 mmol) and dichlorobis(triphenylphosphine)palladium(II) (3 mg, 0.004 mmol). The resulting reaction mixture was stirred at room temperature for 1 h, and then quenched with a saturated solution of ammonium chloride. The aqueous layer was extracted with ethyl acetate (3×30 mL). The combined organics were dried over anhydrous sodium sulfate and concentrated under vacuum. The crude was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkyne (27 mg, 53%) as a white solid: 1H NMR (CDCl3, 300 MHz) δ 8.55 (d, J=9.6 Hz, 1H), 8.04 (d, J=6.9 Hz, 1H), 7.68 (d, J=7.8 Hz, 1H), 7.60 (d, J=9.0 Hz, 1H), 5.88-5.75 (m, 1H), 5.70 (dd, J=10.8, 3.9 Hz, 1H), 5.53 (d, J=11.4 Hz, 1H), 5.45 (d, J=11.1 Hz, 1H), 5.39 (dd, J=12.0, 3.9 Hz, 1H), 5.30-5.20 (m, 2H), 5.17 (t, J=7.5 Hz, 1H), 5.05-4.94 (m, 3H), 4.90-4.75 (m, 2H), 4.57-4.35 (m, 3H), 3.37 (s, 3H), 3.26 (s, 3H), 3.24 (s, 3H), 3.19 (s, 3H), 3.13 (s, 3H), 2.68 (s, 6H), 2.45-2.35 (m, 1H), 2.30-2.12 (m, 2H), 2.11 (s, 3H), 2.02 (s, 3H), 1.95-1.65 (m, 10H), 1.48-0.75 (m, 57H); ESI MS m/z 1341 [C69H117N11O15+H]+.
Example 83
Preparation of Cyclosporin Alkyne
To a solution of the acetate of cyclosporin alkyne from Example 82 (25 mg, 0.019 mmol) in MeOH (2 mL) was added potassium carbonate (79 mg, 0.57 mmol), then the mixture was stirred at room temperature. After 8 h, the reaction mixture was quenched with a saturated solution of ammonium chloride (10 mL). The aqueous layer was extracted with ethyl acetate (3×20 mL). The combined organics were dried over anhydrous sodium sulfate and concentrated under vacuum. The crude material was purified by semi-preparative HPLC to afford cyclosporin alkyne (14 mg, 58%): 1H NMR (300 MHz, CDCl3) δ 8.06 (d, J=9.9 Hz, 1H), 7.68 (d, J=7.5 Hz, 1H), 7.45 (d, J=8.1 Hz, 1H), 7.18 (d, J=8.1 Hz, 1H), 6.05-5.95 (m, 1H), 5.70 (dd, J=10.8, 3.6 Hz, 1H), 5.50 (d, J=6.6 Hz, 1H), 5.40-5.25 (m, 2H), 5.12-4.90 (m, 5H), 4.83 (t, J=6.9 Hz, 1H), 4.65 (t, J=9 Hz, 1H), 4.54 (t, J=7.2 Hz, 1H), 4.04 (d, J=6.6 Hz, 2H), 3.73 (t, J=6.3 Hz, 1H), 3.50 (s, 3H), 3.30 (s, 3H), 3.27 (s, 3H), 3.14 (s, 3H), 3.11 (s, 3H), 2.70 (s, 3H), 2.68 (s, 3H), 2.55-2.35 (m, 2H), 2.20-1.98 (m, 5H), 1.92 (d, J=1.7 Hz, 3H), 1.80-1.55 (m, 6H), 1.48-0.70 (m, 56H); ESI MS m/z 1257 [C65H113N11O13+H]+; HPLC >99% (AUC), tR=13.41 min.
Example 84
Preparation of the Acetate of Cyclosporin Alkyne
To a dried 25 mL flask charged with a solution of the acetate of trans-cyclosporin vinyl iodide from Example 77 (60 mg, 0.04 mmol) in triethylamine (2 mL) was added copper(I) iodide (3.8 mg, 0.02 mmol), followed by dichlorobis(triphenylphosphine)palladium(II) (7.0 mg, 0.01 mmol), and propargyl alcohol (0.02 mL, 0.40 mmol). After 2.5 h, the reaction mixture was filtered through a microfilter, and then concentrated under reduced pressure. The crude material was purified by semi-preparative HPLC to yield the acetate of cyclosporin alkyne (54 mg, quantitative): 1H NMR (300 MHz, CDCl3) δ 8.47 (d, J=9.8 Hz, 1H), 7.94 (d, J=6.8 Hz, 1H), 7.42 (d, J=7.7 Hz, 1H), 7.27 (d, J=7.6 Hz, 1H), 5.38-5.26 (m, 1H), 5.47 (s, 2H), 5.45-5.32 (m, 0.1H), 5.22 (dd, J=9.3, 3.2 Hz, 1H), 5.15 (dd, J=7.7, 5.8 Hz, 1H), 5.07-4.91 (m, 2H), 4.83 (t, J=6.9 Hz, 1H), 4.55-4.21 (m, 4H), 3.35 (s, 3H), 3.27 (s, 3H), 3.26 (s, 3H), 3.21 (s, 3H), 3.15 (s, 3H), 2.67 (s, 3H), 2.65 (s, 3H), 2.44-2.11 (m, 1H), 2.10 (s, 3H), 2.03 (s, 3H), 2.01-1.59 (m, 4H), 1.49-0.74 (m, 68H); ESI MS m/z 1357 [C69H117N11O16+H]+.
Example 85
Preparation of Cyclosporin Alkyne
To a dried 25 mL flask charged with a solution of the acetate of cyclosporin alkyne from Example 84 (54 mg, 0.04 mmol) in methanol (2 mL) was added potassium carbonate (110 mg, 0.80 mmol). This was allowed to stir at room temperature for 5 h, after which it was quenched with a saturated solution of ammonium chloride (8 mL). This was allowed to stir for 10 min. The aqueous layer was then extracted with ethyl acetate (3×40 mL). The combined organics were washed with brine (15 mL), dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. The crude material was purified by semi-preparative HPLC to yield cyclosporin alkyne (28 mg, 54%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 7.80 (d, J=9.7 Hz, 1H), 7.55-7.47 (m, 2H), 7.32 (d, J=7.7 Hz, 1H), 6.05-5.92 (m, 1H), 5.67 (dd, J=10.7, 3.5 Hz, 1H), 5.48-5.35 (m, 3H), 5.14-4.86 (m, 6H), 4.81 (t, J=7.2 Hz, 1H), 4.74 (t, J=9.3 Hz, 1H), 4.47 (t, J=7.1 Hz, 1H), 4.34 (d, J=5.2 Hz, 1H), 4.09-3.96 (m, 3H), 3.49 (s, 3H), 3.31 (s, 3H), 3.24 (s, 3H), 3.18 (s, 3H), 3.14 (s, 3H), 3.10 (s, 3H), 2.69 (s, 6H), 2.48-2.37 (m, 1H), 2.32-2.03 (m, 5H), 2.01-0.77 (m, 61H); ESI MS m/z 1274 [C65H113N11O14+H]+; HPLC >99% (AUC), tR=17.32 min.
Example 86
Preparation of the Acetate of Cyclosporin Alkyne Alcohol
To a dried 25 mL flask charged with a solution of the acetate of trans-cyclosporin vinyl iodide from Example 77 (120 mg, 0.08 mmol) in triethylamine (3 mL) was added copper(I) iodide (15 mg, 0.08 mmol) followed by dichlorobis(triphenylphosphine)palladium(II) (21 mg, 0.04 mmol) and 3-butyn-2-ol (0.06 mL, 0.80 mmol). After 2.5 h, the reaction mixture was filtered through a microfilter then concentrated under reduced pressure. The crude material was purified by semi-preparative HPLC to yield the acetate of cyclosporin alkyne alcohol (79 mg, 73%): 1H NMR (300 MHz, CDCl3) δ 8.49 (d, J=4.7 Hz, 0.5H), 8.46 (d, J=4.6 Hz, 0.5H), 7.98 (d, J=6.0 Hz, 0.5H), 7.96 (d, J=5.9 Hz, 0.5H), 7.49 (d, J=7.0 Hz, 0.5H), 7.46 (d, J=6.7 Hz, 0.5H), 7.38 (d, J=9.1 Hz, 0.5H), 7.34 (d, J=9.1 Hz, 0.5H), 5.79-5.58 (m, 1H), 5.47 (s, 2H), 5.43-5.09 (m, 3H), 5.04-4.78 (m, 4H), 4.76-4.33 (m, 3H), 3.37 (s, 1.5H), 3.35 (s, 1.5H), 3.25 (s, 6H), 3.20 (s, 3H), 3.14 (s, 1.5H), 3.13 (s, 1.5H), 2.67 (s, 3H), 2.66 (s, 3H), 2.49-2.18 (m, 1H), 2.10 (s, 3H), 2.03 (s, 3H), 1.98-1.58 (m, 4H), 1.47-0.71 (m, 70H); ESI MS m/z 1371 [C70H119N11O16+H]+.
Example 87
Preparation of Cyclosporin Alkyne
To a dried 25 mL flask charged with a solution of the acetate of cyclosporin alkyne from Example 86 (25 mg, 0.018 mmol) in methanol (1.5 mL) was added potassium carbonate (50 mg, 0.36 mmol). This was allowed to stir at room temperature for 3.5 h, after which it was quenched with a saturated solution of ammonium chloride (1.5 mL). This was allowed to stir for 5 min. The aqueous layer was then extracted with ethyl acetate (2×20 mL). The combined organics were washed with brine (15 mL), dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. The crude material was purified twice by semi-preparative HPLC to yield cyclosporin alkyne (11 mg, 48%) as a white solid and mixture of diastereomers: 1H NMR (300 MHz, CDCl3) δ 7.89 (d, J=10.1 Hz, 0.7H), 7.70 (d, J=10.3 Hz, 0.3H), 7.54-7.44 (m, 2H), 7.30-7.21 (m, 1H), 6.02-5.86 (m, 1H), 5.67 (dd, J=7.1, 3.9 Hz, 1H), 5.49-5.28 (m, 3H), 5.17-4.42 (m, 9H), 4.09-3.91 (m, 3H), 3.50 (s, 3H), 3.31(s, 3H), 3.24 (s, 3H), 3.14 (s, 3H), 3.10 (s, 2.1H), 3.09 (s, 0.9H), 2.68 (s, 6H), 2.49-2.30 (m, 1H), 2.29-1.89 (m, 5H), 1.84-0.68 (m, 67H); ESI MS m/z 1287 [C66H115N11O14+H]+; HPLC >99% (AUC), tR=17.96 min.
Example 88
Preparation of the Diacetate of Cyclosporin ene-yne-ene
To a 25 mL flask charged with a solution of the acetate of cyclosporin alkynyl alcohol from Example 86 (54 mg, 0.039 mmol) in benzene (2 mL) was added Burgess reagent (19 mg, 0.078 mmol). The resulting mixture was heated at 60° C. After 3.5 h, an additional 8 mg of Burgess reagent were added. The reaction was again heated at 60° C. for 2 h. The mixture was cooled to room temperature and partitioned between ether (60 mL) and water (15 mL). The aqueous layer was extracted once with ether (30 mL). The combined ethereal layers were washed with brine (20 mL), dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. The crude material was purified by semi-preparative HPLC to yield the diacetate of cyclosporin ene-yne-ene (18 mg, 35%): 1H NMR (300 MHz, CDCl3) δ 8.54 (d, J=9.7 Hz, 1H), 8.03 (d, J=6.8 Hz, 1H), 7.62 (d, J=7.7 Hz, 1H), 7.51 (d, J=9.1 Hz, 1H), 6.04-5.86 (m, 1H), 5.74-5.65 (m, 1H), 5.88 (dd, J=17.5, 2.2 Hz, 2H), 5.57-5.42 (m, 3H), 4.95 (t, J=7.5 Hz, 1H), 5.19-4.93 (m, 3H), 4.85 (t, J=7.4 Hz, 1H), 4.79 (t, J=12.0 Hz, 1H), 4.57-3.31 (m, 3H), 3.37 (s, 3H), 3.27 (s, 3H), 3.25 (s, 3H), 3.20 (s, 3H), 3.13 (s, 3H), 2.68 (s, 3H), 2.67 (s, 3H), 2.47-2.31 (m, 1H), 2.24-2.10 (m, 3H), 2.10 (s, 3H), 2.02 (s, 3H), 1.98-1.82 (m, 4H), 1.80-1.60 (m, 4H), 1.48-0.72 (m, 58H); ESI MS m/z 1353 [C70H117N11O15+H]+.
Example 89
Preparation of Cyclosporin ene-yne-ene
A solution of the diacetate of cyclosporin ene-yne-ene from Example 88 (28 mg, 0.02 mmol) in methanol (2 mL) was treated with potassium carbonate (55 mg, 0.40 mmol). This was allowed to stir at room temperature overnight, after which it was quenched with a saturated solution of ammonium chloride (10 mL). The aqueous layer was then extracted with ethyl acetate (2×40 mL). The combined organics were washed with brine (15 mL), dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. The crude material was purified by semi-preparative HPLC to yield cyclosporin ene-yne-ene (8 mg, 32%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 8.07 (d, J=9.8 Hz, 1H), 7.70 (d, J=7.3 Hz, 1H), 7.58 (d, J=8.0 Hz, 1H), 7.27 (d, J=8.4 Hz, 1H), 6.14-6.04 (m, 1H), 5.97-5.85 (m, 1H), 5.76-5.66 (m, 1H), 5.63 (d, J=2.0 Hz, 1H), 5.58-5.41 (m, 4H), 5.30 (dd, J=11.4, 3.1 Hz, 1H), 5.17-4.91 (m, 6H), 4.83 (t, J=7.1 Hz, 1H), 4.65 (t, J=9.1 Hz, 1H), 4.55 (t, J=7.2 Hz, 1H), 4.05 (d, J=6.6 Hz, 1H), 3.73 (t, J=6.6 Hz, 1H), 3.50 (s, 3H), 3.30 (s, 3H), 3.26 (s, 3H), 3.15 (s, 3H), 3.10 (s, 3H), 2.71 (s, 3H), 2.69 (s, 3H), 2.63-2.52 (m, 1H), 2.44-2.34 (m, 1H), 2.23-1.88 (m, 5H), 1.83-1.60 (m, 7H), 1.50-0.69 (m, 54H); ESI MS m/z 1269 [C66H113N11O13+H]+; HPLC 92.7% (AUC), tR=19.67 min.
Example 90
Preparation of the Diacetate of Cyclosporin Alkynyl Bromide
To a flask charged with a solution of the acetate of cyclosporin alkyne from Example 78 (33 mg, 0.02 mmol) in acetone (2 mL) was added silver nitrate (3.4 mg, 0.02 mmol) and recrystallized N-bromosuccinnimide (36 mg, 0.2 mmol). After 2 h, the reaction was cooled to 0° C. and 5 mL of water were added. The aqueous layer was then extracted with ether (3×75 mL). The combined ethereal layers were washed with water (20 mL) and then brine (20 mL). The organics were dried over anhydrous sodium sulfate and then concentrated under reduced pressure. The crude material was purified by semi-preparative HPLC to yield the diacetate of cyclosporin alkynyl bromide (23 mg, 80%): 1H NMR (300 MHz, CDCl3) δ 8.54 (d, J=9.7 Hz, 1H), 8.02 (d, J=6.7 Hz, 1H), 7.67 (d, J=7.7 Hz, 1H), 7.57 (d, J=9.1 Hz, 1H), 6.11-6.00 (m, 1H), 5.69 (dd, J=11.1, 4.0 Hz, 1H), 5.58-5.42 (m, 1H), 5.40-5.13 (m, 5H), 5.07-4.91 (m, 3H), 4.88 (t, J=7.1 Hz, 1H), 4.85 (t, J=9.8 Hz, 1H), 4.57-4.34 (m, 3H), 3.37 (s, 3H), 3.26 (s, 3H), 3.24 (s, 3H), 3.19 (s, 3H), 2.68 (s, 6H), 2.48-2.32 (m, 1H), 2.27-2.12 (m, 3H), 2.11 (s, 3H), 2.02 (s, 3H), 1.98-1.61 (m, 7H), 1.49-0.66 (m, 59H); ESI MS m/z 1406 [C68H114BrN11O15+H]+.
Example 91
Preparation of Cyclosporin Alkynyl Bromide
A solution of the diacetate of cyclosporin alkynyl bromide from Example 90 (22.5 mg, 0.02 mmol) in methanol (2 mL) was treated with potassium carbonate (55 mg, 0.40 mmol). The resulting mixture was stirred at room temperature for 4 h, after which it was quenched with a saturated solution of ammonium chloride (10 mL). The aqueous layer was then extracted with ethyl acetate (3×30 mL). The combined organics were washed with brine (20 mL), dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. The crude material was purified by semi-preparative HPLC to yield cyclosporin alkynyl bromide (4.7 mg, 18%): 1H NMR (300 MHz, CDCl3) δ 8.09 (d, J=10.0 Hz, 1H), 7.70 (d, J=7.4 Hz, 1H), 7.54 (d, J=8.3 Hz, 1H), 7.27 (d, J=9.9 Hz, 1H), 6.24-6.21 (m, 1H), 5.70 (dd, J=11.0, 3.9 Hz, 1H), 5.49 (d, J=6.6 Hz, 1H), 5.44-5.34 (m, 1H), 5.30 (dd, J=11.8, 3.8 Hz, 1H), 5.13-4.92 (m, 5H), 4.80 (t, J=5.6 Hz, 1H), 4.65 (t, J=8.6 Hz, 1H), 4.51 (t, J=6.8 Hz, 1H), 4.04 (d, J=6.7 Hz, 2H), 3.77 (t, J=6.4 Hz, 1H), 3.49 (s, 3H), 3.30 (s, 3H), 3.26 (s, 3H), 3.15 (s, 3H), 3.11 (s, 3H), 2.70 (s, 3H), 2.69 (s, 3H), 2.57-2.36 (m, 2H), 2.21-1.95 (m, 6H), 1.85-1.56 (m, 7H), 1.50-0.72 (m, 54H); ESI MS m/z 1320 [C64H110BrN11O13+H]+; HPLC >99% (AUC), tR=19.68 min.
Example 92
Preparation of the Diacetate of Cyclosporin Alkyne
A flask charged with a solution of cyclopropyl(trimethylsilyl)acetylene (0.1 mL, 0.6 mmol) in triethylamine (3 mL) was cooled to 0° C. Tetrabutylammonium fluoride (0.72 mL, 1 M in THF, 0.72 mmol) was added and the mixture was allowed to stir for 10 min. The ice bath was removed and the flask warmed to room temperature over 30 min. The acetate of trans-cyclosporin vinyl iodide from Example 77 (80 mg, 0.06 mmol) was added followed by copper(I) iodide (5.7 mg, 0.03 mmol) and dichlorobis(triphenylphosphine)palladium(II) (21 mg, 0.03 mmol). After 2 h, the reaction mixture was filtered twice through a microfilter then concentrated under reduced pressure. The crude material was purified by semi-preparative HPLC to afford the diacetate of cyclosporin alkyne (47 mg, 57%): 1H NMR (300 MHz, CDCl3) δ 8.54 (d, J=9.5 Hz, 1H), 8.04 (d, J=6.8 Hz, 1H), 7.66 (d, J=7.7 Hz, 1H), 7.57 (d, J=9.1 Hz, 1H), 5.89-5.77 (m, 1H), 5.69 (dd, J=10.9, 3.6 Hz, 1H), 5.57-5.34 (m, 3H), 5.34-5.13 (m, 3H), 5.08-4.94 (m, 3H), 4.86 (t, J=7.1 Hz, 1H), 4.79 (t, J=9.3 Hz, 1H), 4.57-4.33 (m, 3H), 3.37 (s, 3H), 3.26 (s, 3H), 3.23 (s, 3H), 3.19 (s, 3H), 3.13 (s, 3H), 2.68 (s, 6H), 2.44-2.31 (m, 1H), 2.27-2.14 (m, 2H), 2.15 (s, 3H), 2.01 (s, 3H), 1.93-1.63 (m, 7H), 1.57-0.63 (m, 62H); ESI MS m/z 1367 [C71H119N11O15+H]+.
Example 93
Preparation of Cyclosporin Alkyne
A solution of the diacetate of cyclosporin alkyne from Example 92 (47 mg, 0.03 mmol) in methanol (2 mL) was treated with potassium carbonate (82 mg, 0.60 mmol). The resulting mixture was stirred at room temperature for 16 h, after which it was quenched with a saturated solution of ammonium chloride (10 mL). The aqueous layer was then extracted with ethyl acetate (3×75 mL). The combined organics were washed with brine (15 mL), dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. The crude material was purified by semi-preparative HPLC to yield cyclosporin alkyne (25 mg, 66%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 8.04 (d, J=10.1 Hz, 1H), 7.66 (d, J=7.7 Hz, 1H), 7.44 (d, J=8.3 Hz, 1H), 7.16 (d, J=7.9 Hz, 1H), 6.04-5.92 (m, 1H), 5.70 (dd, J=10.9, 3.6 Hz, 1H), 5.51 (d, J=6.2 Hz, 1H), 5.38-5.31 (m, 1H), 5.28 (dd, J=12.2, 4.0 Hz, 1H), 5.13-4.89 (m, 5H), 4.83 (t, J=7.2 Hz, 1H), 4.64 (t, J=9.7 Hz, 1H), 4.54 (t, J=7.5 Hz, 1H), 4.03 (d, J=6.7 Hz, 2H), 3.70 (t, J=6.2 Hz, 1H), 3.49 (s, 3H), 3.30 (s, 3H), 3.27 (s, 3H), 3.14 (s, 3H), 2.70 (s, 3H), 2.68 (s, 3H), 2.59-2.30 (m, 2H), 2.23-1.95 (m, 6H), 1.85-1.56 (m, 7H), 1.50-0.66 (m, 65H); ESI MS m/z 1283 [C67H115N1O13+H]+; HPLC 97.7% (AUC), tR=19.58 min.
Example 94
Preparation of the Acetate of Cyclosporin Alkynyl Thioether
To a flask charged with a solution of the acetate of trans-cyclosporin vinyl iodide from Example 77 (70 mg, 0.05 mmol) in triethylamine (3 mL) was added copper(I) iodide (5.7 mg, 0.03 mmol) followed by dichlorobis(triphenylphosphine)palladium(II) (21 mg, 0.03 mmol) and propargyl ethyl sulphide (0.1 mL, 0.5 mmol). After 5.5 h, an additional 21 mg of dichlorobis(triphenylphosphine)palladium(II) were added and the reaction was left to stir overnight. The reaction mixture was filtered through a microfilter then concentrated under reduced pressure. The crude material was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkynyl thioether (45 mg, 64%): 1H NMR (300 MHz, CDCl3) δ 8.54 (d, J=9.7 Hz, 1H), 8.04 (d, J=6.8 Hz, 1H), 7.67 (d, J=7.7 Hz, 1H), 7.62 (d, J=9.1 Hz, 1H), 5.96-5.84 (m, 1H), 5.70 (dd, J=11.1, 3.9 Hz, 1H), 5.57-5.42 (m, 2H), 5.39-5.13 (m, 5H), 5.08-4.97 (m, 3H), 4.86 (t, J=7.2 Hz, 1H), 4.78 (t, J=9.6 Hz, 1H), 4.59-4.33 (m, 3H), 3.37 (s, 3H), 3.26 (s, 3H), 3.23 (s, 3H), 3.19 (s, 3H), 3.13 (s, 3H), 2.69 (s, 3H), 2.68 (s, 3H), 2.45-2.34 (m, 1H), 2.24-2.12 (m, 2H), 2.14 (s, 3H), 2.02 (s, 3H), 1.97-1.83 (m, 5H), 1.76-1.13 (m, 4H), 1.48-0.75 (m, 61H); ESI MS m/z 1401 [C71H121N11O15S+H]+.
Example 95
Preparation of Cyclosporin Alkynyl Thioether
A solution of the acetate of cyclosporin alkynyl thioether from Example 94 (45 mg, 0.03 mmol) in methanol (2 mL) was treated with potassium carbonate (83 mg, 0.60 mmol). The resulting mixture was stirred at room temperature for 16 h, after which it was quenched with a saturated solution of ammonium chloride (10 mL). The aqueous layer was then extracted with ethyl acetate (3×75 mL). The combined organics were washed with brine (50 mL), dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. The crude material was purified by semi-preparative HPLC to yield cyclosporin alkynyl thioether (23 mg, 58%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 8.04 (d, J=10.0 Hz, 1H), 7.66 (d, J=7.8 Hz, 1H), 7.45 (d, J=8.2 Hz, 1H), 7.15 (d, J=7.8 Hz, 1H), 6.13-5.99 (m, 1H), 5.70 (dd, J=11.1, 4.2 Hz, 1H), 5.53 (d, J=5.9 Hz, 1H), 5.45-5.36 (m, 1H), 5.28 (dd, J=11.7, 3.8 Hz, 1H), 5.14-4.87 (m, 3H), 4.83 (t, J=7.3 Hz, 1H), 4.64 (t, J=9.5 Hz, 1H), 4.55 (t, J=7.5 Hz, 1H), 4.04 (d, J=6.8 Hz, 2H), 3.70 (t, J=6.3 Hz, 1H), 3.50 (s, 3H), 3.40 (s, 3H), 3.30 (s, 3H), 3.27 (s, 3H), 3.15 (s, 3H), 2.73-2.64 (m, 9H), 2.61-2.52 (m, 1H), 2.45-2.34 (m, 1H), 2.24-1.89 (m, 12H), 1.83-1.57 (m, 8H), 1.48-0.75 (m, 53H); ESI MS m/z 1317 [C67H117N11O13S+H]+; HPLC 94.0% (AUC), tR=19.80 min.
Example 96
Preparation of the Acetate of Cyclosporin Alkynyl Ether
To a flask charged with a solution of the acetate of trans-cyclosporin vinyl iodide from Example 77 (70 mg, 0.05 mmol) in triethylamine (3 mL) was added copper(I) iodide (5.7 mg, 0.03 mmol) followed by dichlorobis(triphenylphosphine)palladium(II) (21 mg, 0.03 mmol) and methyl propargyl ether (0.05 mL, 0.5 mmol). After 6 h, the reaction mixture was filtered through a microfilter then concentrated under reduced pressure. The crude material was purified by semi-preparative HPLC to afford the acetate of cyclosporin alkynyl ether (52 mg, 75%): 1H NMR (300 MHz, CDCl3) δ 8.52 (d, J=9.6 Hz, 1H), 8.01 (d, J=6.8 Hz, 1H), 7.59 (d, J-=7.7 Hz, 1H), 7.46 (d, J=9.1 Hz, 1H), 6.06-5.93 (m, 1H), 5.68 (dd, J=10.9, 3.8 Hz, 1H), 5.57-5.42 (m, 2H), 5.37-5.31 (m, 2H), 5.08-4.97 (m, 3H), 5.29 (dd, J=8.9, 2.6 Hz, 1H), 5.15 (t, J=5.6 Hz, 1H), 5.19-4.92 (m, 3H), 4.85 (t, J=7.2 Hz, 1H), 4.78 (t, J=9.6 Hz, 1H), 3.39 (s, 3H), 3.37 (s, 3H), 3.27 (s, 3H), 3.24 (s, 3H), 3.20 (s, 3H), 3.18 (s, 3H), 2.68 (s, 3H), 2.67 (s, 3H), 2.47-2.33 (m, 1H), 2.33-2.13 (m, 3H), 2.10 (s, 3H), 2.10 (s, 3H), 1.95-1.83 (m, 4H), 1.43-0.75 (m, 61H); ESI MS m/z 1371 [C70H119N11O16+H]+.
Example 97
Preparation of Cyclosporin Alkynyl Ether
A solution of the acetate of cyclosporin alkynyl ether from Example 96 (52 mg, 0.04 mmol) in methanol (2 mL) was treated with potassium carbonate (111 mg, 0.80 mmol). The resulting mixture was stirred at room temperature for 16 h, after which it was quenched with a saturated solution of ammonium chloride (10 mL). The aqueous layer was then extracted with ethyl acetate (3×75 mL). The combined organics were washed with brine (15 mL), dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. The crude material was purified by semi-preparative HPLC to yield cyclosporin alkynyl ether (37 mg, 73%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 8.07 (d, J=9.8 Hz, 1H), 7.67 (d, J=7.6 Hz, 1H), 7.46 (d, J=8.2 Hz, 1H), 7.17 (d, J=8.0 Hz, 1H), 6.19-6.07 (m, 1H), 5.70 (dd, J=10.9, 3.9 Hz, 1H), 5.52 (d, J=6.1 Hz, 1H), 5.49-5.41 (m, 1H), 5.27 (dd, J=11.7, 3.8 Hz, 1H), 5.11-4.91 (m, 6H), 4.83 (t, J=7.4 Hz, 1H), 4.64 (t, J=8.5 Hz, 1H), 4.54 (t, J=7.4 Hz, 1H), 4.20 (d, J=1.8 Hz, 2H), 4.04 (d, J=6.8 Hz, 2H), 3.72 (t, J=6.6 Hz, 1H), 3.50 (s, 3H), 3.39 (s, 3H), 3.30 (s, 3H), 3.27 (s, 3H), 3.15 (s, 3H), 3.11 (s, 3H), 2.70 (s, 3H), 2.68 (s, 3H), 2.53-2.41 (m, 5H), 2.41-2.21 (m, 6H), 2.20-1.92 (m, 6H), 1.85-1.56 (m, 7H), 1.51-0.66 (m, 44H); ESI MS m/z 1287 [C66H115N11O14+H]+; HPLC >99% (AUC), tR=18.42 min.
Example 98
Concanavalin A-Stimulated Splenocyte Assay
Male BALB/c mice, at 5 to 7 weeks of age, were sacrificed by CO2 inhalation. Spleens were removed and dissociated by pushing through a nylon cell strainer. The splenocytes were washed in RPMI 1640/5% fetal calf serum (FCS) and pelleted at 400×g. Red blood cells were then lysed by resuspending the cell pellet in ACK lysis buffer (150 mM NH4Cl, 1 mM KHCO3, 0.1 mM EDTA, 3 mL per spleen) for 10 min at room temperature. After pelleting at 400×g, the cells were washed by resuspending in RPMI 1640/5% FCS and repelleting. The cell pellet was resuspended in RPMI 1640/5% FCS and again passed through a cell strainer to remove cell aggregates. The cells were then counted and adjusted to 2×106 cells/ml in RPMI 1640/10% FCS/50 μM 2-mercaptoethanol. Cell viability was assessed by Trypan blue staining. Cyclosporin A or the test compound and two micrograms of concanavalin A were added to the wells of a 96 well plate, prior to the addition of 2×105 splenocytes. The cells were cultured in a 37° C. CO2 incubator for 2 days and then pulsed with 1 μCi of [3H]thymidine for 6 hours. Cells were harvested onto filtermats with a TomTec 96 well plate harvester and lysed with H2O. The filtermat and scintillation fluid were sealed in a plastic sleeve. [3H]thymidine incorporation was measured with a Wallac Trilux plate counter. Initial screens were done at a fixed value of 100 ng/ml test compound. IC50s were calculated from 7 point concentration-response curves using GraphPad software.
Example 99
Murine Ex Vivo Pharmacodynamic Assay
In vivo immunosuppressive activity can be determined for cyclosporin A and the disclosed cyclosporin analogs, as described below. The concanavalin A-stimulated splenocyte activity can be assessed in vivo using a method previously described by Peterson et al. (Peterson et al., “A Tacrolimus-Related Immunosuppressant with Biochemical Properties Distinct from Those of Tacrolimus,” Transplantation, 65:10-18 (1998), which is hereby incorporated by reference in its entirety) or a slightly modified version thereof.
Optimal doses of cyclosporin A or an immunosuppressive compound of the present invention (four different doses of test drug plus a control set of animals with no drug) was administered orally or intravenously to male BALB/c or female C57BL mice. Three mice were tested at each dose. Concanavalin A was injected into the tail vein of the mouse at 4 hours after the administration of cyclosporin A or the immunosuppressive compound. One hour after the concanavalin A injection, the mice were euthanized, the spleens were removed under sterile conditions, and the extent of splenocyte proliferation was measured in a similar manner as described in Example 98. The percent inhibition relative to control was plotted graphically versus the dose of the immunosuppressive compound and an ED50 value was determined. Each dose-response assay for the compound of the present invention was accompanied by a cyclosporin control at a single dose equal to the ED50.
Although the invention has been described in detail for the purpose of illustration, it is understood that such detail is solely for that purpose, and variations can be made therein by those skilled in the art without departing from the spirit and scope of the invention which is defined by the following claims.

## Claims

1. A compound of Formula I:




wherein:
X is OH or OAc;
R0 is H, CH2OH, or CH2OR3;
R1 is hydrogen, deuterium, or methyl;
R2 is selected from the group consisting of:
hydrogen;
halogen;
C1-C6 saturated or unsaturated, straight or branched carbon chain;
C1-C6 saturated or unsaturated, straight or branched carbon chain containing a substitution or substitutions selected from the group consisting of deuterium, halogen, nitrogen, sulfur, and silicon;
C1-C6 saturated or unsaturated, straight or branched carbon chain containing a function group or function groups selected from the group consisting of alcohol, ether, aldehyde, ketone, carboxylic acid, ester, and amide;
C1-C6 saturated or unsaturated, straight or branched carbon chain containing a function group of oxime or hydrazone;
C1-C6 saturated or unsaturated, straight or branched carbon chain containing an aryl or a heteroaryl group;
C3-C6 substituted and unsubstituted cycloalkyl;
substituted and unsubstituted aryl; and
substituted and unsubstituted heteroaryl; and

R3 is selected from the group consisting of:
alkanoyl,
alkenoyl,
alkynoyl,
aryloyl,
arylalkanoyl,
alkylaminocarbonyl,
arylaminocarbonyl,
arylalkylaminocarbonyl,
alkyloxycarbonyl,
aryloxycarbonyl, and
arylalkyloxycarbonyl,


wherein the compound is a cis geometric isomer, a trans geometric isomer, or a pharmaceutically acceptable salt thereof.

2. The compound according to claim 1, wherein X is OH or OAc, R0 is H, CH2OH, or CH2OAc, and R1 is H or D.

3. The compound according to claim 2, wherein R2 is H.

4. The compound according to claim 2, wherein R2 is selected from the group consisting of CH3, CD3, CH2CH3, and CH2CH2CH3.

5. The compound according to claim 2, wherein R2 is selected from the group consisting of CH═CH2, CH═CHCH3, C≡CH, and —C≡C—CH3.

6. The compound according to claim 2, wherein R2 is selected from the group consisting of F, Cl, Br, and I.

7. The compound according to claim 2, wherein R2 is cyclopropyl.

8. The compound according to claim 2, wherein R2 is selected from the group consisting of CH2OH, CH(OH)CH3, CH2OCH3, CH2OCH2CH3, CHO, and C(═O)CH3.

9. The compound according to claim 2, wherein R2 is selected from the group consisting of CH═N—OCH3, CH═N—OCH2CH3, CH═N—NHCH3, and CH═N—N(CH3)2.

10. A pharmaceutical composition comprising a pharmaceutically acceptable carrier and a therapeutically effective amount of the compound of claim 1.