Patent Application
20080194536
The present invention relates to a cyanoarylamine that is useful as a progesterone receptor modulator.
Endometriosis is a disease characterized by the growth of endometrial tissue (called lesions) at extrauterine sites. This lesion attachment can result in pain, dysmenorrhea, dyspareunia, and infertility. It is estimated that greater than 80% of patients presenting with chronic pelvic pain are eventually diagnosed with endometriosis. The prevalence of the disease is about 7-10% of women of reproductive years with a familial association risk increase of 10-fold. Definitive diagnosis is only reached by laparoscopy, but typically there is about a ten year delay from disease onset to conclusive diagnosis. Consistent with their uterine origins, it is believed that the endometriotic lesions are hormonally dependent upon estrogen; consequently, therapies that functionally antagonize estrogen production or action, such as drugs containing progesterone receptor (PR) modulators, are efficacious in alleviating symptoms. Current therapeutic goals include reducing pain with anti-inflammatory agents and suspending the ovarian cycle using hormonal modulation drugs.
Another disease believed to be hormonally responsive to estrogen is uterine leiomyomas (fibroids), which appear as benign uterine smooth muscle tumors occurring primarily in women of reproductive age. Fibroids occur at rates of 20-25% and are the leading indication for hysterectomies. The most common symptoms are menorrhagia, pelvic pain/discomfort, bladder and bowel compression symptoms, and possibly infertility. Medical treatments for leiomyomas consist of those commonly prescribed for endometriosis, with treatments containing progesterone receptor modulators being most common due to safety, tolerability, ease of use and cost.
Most drug development has focused on modulation by full agonism or antagonism of progesterone receptors. For example, progestins are molecules that interact with progesterone receptor to activate or repress gene expression in target cells in a manner presumed to be progesterone-like. Though progestins are used in oral contraception, hormone therapy, and treatment of reproductive disorders, such as endometriosis and leiomyomas, these agents cause a number of adverse effects, including breakthrough bleeding, mood altering, acne, weight gain, and breast tenderness. Paradoxically, progesterone receptor antagonists such as mifepristone have been suggested as potential therapies, but the data are limited with few patients and no placebo-controlled randomized trials.
D. DeManno et al. (Steroids 68 (2003) 1019-1032), report that asoprisnil is a progesterone receptor modulator with mixed agonist/antagonistic activities. While the efficacy of the agent in treatment of endometriosis or fibroids is uncertain, early data from healthy female subjects indicate that the agent induces endometrial atrophy and amenorrhea, which suggests a predominantly progesterone receptor antagonist action in humans. Unfortunately, PR antagonists such as RU-486 tend to be abortifacient.
Accordingly, it would be desirable to discover a way to suppress estrogen-dependent endometriotic growth while reducing the systemic effects associated with current progesterone receptor modulating therapy.
In a first aspect, the present invention provides a A compound represented by the following formula:
or a pharmaceutically acceptable salt thereof, or a pharmaceutically acceptable solvate thereof, or a combination thereof;
wherein n is 0, 1, or 2;
Ar is phenyl or naphthyl;
each Ro is independently CF3, halo, C1-6-alkyl, CN, or substituted C1-6-alkyl;
R1 and R1′ are each independently H, C1-6-alkyl, substituted C1-6-alkyl, C2-6-alkenyl, C3-6-cycloalkyl, substituted C3-6-cycloalkyl, aryl, substituted aryl, heteroaryl, or substituted heteroaryl, or together with the carbon atom to which they are both attached form a C5-6-cycloalkyl or C5-6-cycloalkenyl group;
R2 and R2′ are each independently H, C1-6-alkyl, substituted C1-6-alkyl, C3-6-cycloalkyl, substituted C3-6-cycloalkyl, —(CH2)m—X—C3-6-cycloalkyl, —(CH2)m—X-substituted C3-6-cycloalkyl, —(CH2m—X-phenyl, —(CH2)m—X-substituted phenyl, —(CH2)m—X-pyridyl, or —(CH2)m—X-substituted pyridyl; and X is a bond, —O— or —S—, where m is 0-4 when X is a bond and m is 1-4 when X is —O— or —S—; with the proviso that R2 and R2′ are not both H; and
each R3 is independently C1-6-alkyl, substituted C1-6-alkyl, C1-6-alkenyl, or propargyl, or together with the nitrogen to which they are attached form a 3-6-membered heterocycloalkyl group;
with the proviso that when a) Ar is phenyl; b) R2 is methyl or ethyl; c) R2′ is H; d) each R3 is methyl; e) R1 is H; f) Ro is CF3 ortho to the CN, and g) n=1; then R1′ is not cyclopropyl or CF3.
In a second aspect, the present invention further relates to a method of treating a patient comprising administering to the patient an effective amount of a compound of the formula or a pharmaceutically-acceptable salt thereof, or a solvate thereof or combination thereof to treat endometreosis or uterine fibroids.
In a third aspect, the present invention relates to a composition comprising the compound of the formula of the present invention and a pharmaceutically acceptable carrier therefore.
Compounds of the present invention are useful as progesterone receptor modulators.
The present invention is a compound represented by the following formula:
or a pharmaceutically acceptable salt thereof, or a pharmaceutically acceptable solvate thereof, or a combination thereof;
wherein n is 0, 1, or 2;
Ar is phenyl or naphthyl;
each Ro is independently CF3, halo, C1-6-alkyl, CN, or substituted C1-6-alkyl;
R1 and R1′ are each independently H, C1-6-alkyl, substituted C1-6-alkyl, C2-6-alkenyl, C3-6-cycloalkyl, C3-6-substituted cycloalkyl, aryl, substituted aryl, heteroaryl, or substituted heteroaryl, or together with the carbon atom to which they are both attached form a C5-6-cycloalkyl or C5-6-cycloalkenyl group;
R2 and R2′ are each independently H, C1-6-alkyl, substituted C1-6-alkyl, C3-6-cycloalkyl, substituted C3-6-cycloalkyl, —(CH2)m—X—C3-6-cycloalkyl, —(CH2)m—X-substituted C3-6-cycloalkyl, —(CH2)m—X-phenyl, —(CH2)m—X-substituted phenyl, —(CH2)m—X-pyridyl, or —(CH2)m—X-substituted pyridyl; and X is a bond, —O— or —S—, where m is 0-4 when X is a bond and m is 1-4 when X is —O— or —S—; with the proviso that R2 and R2′ are not both H; and
each R3 is independently C1-6-alkyl, substituted C1-6-alkyl, C1-6-alkenyl, or propargyl, or together with the nitrogen to which they are attached form a 3-6-membered heterocycloalkyl group;
with the proviso that when a) Ar is phenyl; b) R2 is methyl or ethyl; c) R2′ is H; d) each R3 is methyl; e) R1 is H; f) Ro is CF3 ortho to the CN, and g) n=1; then R1′ is not cyclopropyl or CF3.
The cyanoarylamine of the present invention is a 1,4-cyanoarylamine, that is, the partial structure NC—Ar—N< refers to a 1,4-relationship between the cyano group and the nitrogen atom. Thus, where Ar is phenyl, the cyano group and nitrogen atom are para to each other.
As used herein, halo refers to —F, —Cl, —Br, or —I; C1-6-alkyl refers to a straight or branched chain monovalent radical of 1 to 6 carbon atoms, including, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, t-butyl, n-pentyl, isopentyl, neopentyl, and n-hexyl and isomers thereof.
Substituted C1-6-alkyl refers to alkyl groups substituted with up to three atoms or groups selected from —F, —Cl, —Br, —OH, —SH, —COOH, —N(R4)2 and —CN, where each R4 is independently H or C1-6-alkyl. Substituted C1-6-alkyl also includes incorporated atoms or groups selected from —O—, —S—, and —NR4—. Examples of suitable substituted alkyl groups include but are not limited to —CF3, —CH2CF3, and —CH(OCH3)2.
Substituted C3-6-cycloalkyl refers to cycloalkyl groups substituted with up to three atoms or groups selected from F, —Cl, —Br, —OH, —SH, —COOH, —N(R4)2 and —CN, where R4 is previously defined.
Examples of C2-6-alkenyl groups include vinyl, allyl, and isopropenyl groups. Examples of suitable aryl groups include phenyl and naphthyl groups; suitable heteroaryl groups include pyridyl, furyl, and thienyl groups. Substituted aryl (including phenyl) and substituted heteroaryl (including pyridinyl) refer to aryl and heteroaryl groups respectively substituted with up to three atoms or groups selected from —F, —Cl, —Br, —CF3, —CH3, —CH2CH3, —OH, —OCH3, —SH, CN, —COOH, and —(CH2)pN(R4)2 groups, where p is 0, 1, or 2.
Examples of 3-6-membered heterocycloalkyl groups include aziridinyl, azetidinyl, pyrrolidinyl, piperidinyl, piperazinyl, thiazolidinyl, thiomorpholino, and morpholino groups.
The term “IC50” is used herein to refer to the molar concentration of a compound required to inhibit binding of 50% of Fluormone PL Red to the progesterone receptor. Furthermore, pIC50 is the negative log of the molar IC50.
Pharmaceutically acceptable salts of the compounds of the present invention include salts formed by the addition of an inorganic acid such as hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, or phosphoric acid; or by the addition of an organic acid such as acetic acid, fumaric acid, succinic acid, maleic acid, citric acid, benzoic acid, p-toluenesulfonic acid, methanesulfonic acid, naphthalenesulfonic acid, or tartaric acid.
Some of the compounds of the present invention may exist as optical isomers including diastereoisomers and enantiomers, and mixtures of isomers in all ratios including racemic mixtures. The different isomeric forms may be separated or resolved by conventional methods, or any given isomer may be obtained by conventional synthetic methods or by stereospecific or asymmetric synthesis.
The present invention also relates to a pharmaceutical composition comprising the compound of the formula of the present invention and a pharmaceutically acceptable carrier therefor. The composition may be formulated for administration by any route, such as oral, topical or parenteral. The compositions may be in the form of tablets, capsules, powders, granules, lozenges, creams or liquid preparations, such as oral or sterile parenteral solutions or suspensions.
Biological Assays
Abbreviations
Acquest/Biosystems is a multi-mode reader (FP reader); CHAPS refers to 3-cholamidopropyl-dimethylammoniol-propanesulfonate; DTT refers to dithiothreitol.
PR Binding Assay—The assay was performed according to the manufacturers protocol (PR Competitor Assay Kit, Red—(Invitrogen—Product No. P2962)) with minor amendments. Briefly, 40 nM PR-Ligand Binding Domain, 2 nM Fluormone PL Red and 1 mM DTT were dissolved and mixed in Complete PR RED Buffer supplemented with 2 mM CHAPS. 10 μL of the mix was dispensed to each well of Greiner low volume plates, containing compounds at the required concentration. The plates were spun for 1 min at 200 g, covered to protect the reagents from light, and then incubated at room temperature for approximately 2 hours. Plates were read on an Acquest using a 530-25 nm excitation and 580-10 nm emission interference filter and a 561 nm Dichroic mirror.
Data Analysis
All data was normalized to the mean of 16 high and 16 low control wells on each plate. A four parameter curve fit of the following form was then applied
Where a is the minimum, b is the Hill slope, c is the XC50 and d is the maximum. Data is presented as the mean pIC50 with the standard deviation of the mean of n experiments.
Methods of Use
The compounds of the present invention are useful as modulators of progesterone receptors and may be useful in the treatment of disease associated with endometreosis and uterine fibroids. Thus, the present invention further relates to a method of treating a patient comprising administering to the patient an effective amount of a compound of formula I or a pharmaceutically-acceptable salt thereof, or a solvate thereof or combination thereof to treat endometreosis or uterine fibroids.
The following Examples are for illustrative purposes only and are not intended to limit the scope of the invention. The compounds from these Examples exhibit a pIC50 of greater than 5 (i.e., an IC50 of less than 10 μM).
The names and structures of the compounds prepared in the Examples are illustrated in the following Table.
Compounds of the present invention can be prepared, for example, as illustrated in Scheme I. In the scheme, Cbz refers to benzyloxycarbonyl; EDC refers to 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride; DMAP refers to dimethylaminopyridine; EtOH refers to ethanol; and DMF refers to dimethylformamide. Ro, R1, R1′, R2, R2′, R3, and n are as previously defined.
Examples 1-16 were prepared using Scheme I:
To an ice cooled solution of N-{[(phenylmethyl)oxy]carbonyl}-L-alanine (5 g, 22.4 mmol) in dichloromethane was added dimethylamine (2.0 M in THF, 19.0 mL, 38.1 mmol), dimethylaminopyridine (0.27 g, 2.24 mmol), and 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (7.3 g, 38.1 mmol). The reaction was warmed to room temperature and stirred overnight. The reaction was extracted two times with 1 N HCl. The organic layer was dried over Na2SO4, concentrated, and the title compound was purified using silica chromatography. 1H NMR (400 MHz, CDCl3) δ 7.33 (m, 5H), 5.85 (d, 1H, J=7.2 Hz), 5.11 (s, 2H), 4.69 (quintet, 1H, J=7.2 Hz), 3.08 (s, 3H), 2.98 (s, 3H), 1.34 (d, 3H, J=6.8 Hz). MS m/z 251 (M++1).
To phenylmethyl [(1S)-2-(dimethylamino)-1-methyl-2-oxoethyl]carbamate (4.93 g, 19.7 mmol) was added 0.74 g of 10% palladium on carbon and 200 mL of ethanol. A hydrogen balloon was attached, and the reaction was stirred overnight. The reaction was filtered through celite, and the filtrate was concentrated to afford the above titled compound. 1H NMR (400 MHz, MeOH-d4) δ 4.08 (q, 1H, J=6.8 Hz), 3.10 (s, 3H), 2.98 (s, 3H), 1.32 (d, 3H, J=6.8 Hz). MS m/z 117 (M++1)
To a solution of N1,N1-dimethyl-L-alaninamide (2.03 g, 17.5 mmol) in 30 mL of DMF was added 4-fluoro-2-(trifluoromethyl)benzonitrile (2.75 g, 14.5 mmol) and potassium carbonate (3.0 g, 21.8 mmol). The reaction was heated at 90° C. for five hours before cooling to room temperature. The reaction was diluted with diethyl ether and extracted with an aqueous LiBr solution and then water. The organic layer was dried over Na2SO4, concentrated, and the above titled compound was isolated using silica gel chromatography. 1H NMR (400 MHz, CDCl3) δ 7.49 (d, 1H, J=8.4 Hz), 6.84 (s, 1H), 6.64 (dd, 1H, J=1.6, 8.4 Hz), 5.95 (bs, 1H), 4.45 (q, 1H, J=6.4 Hz), 3.14 (s, 3H), 3.02 (s, 3H), 1.40 (d, 3H, J=6.4 Hz). MS m/z 286 (M++1)
To a suspension of sodium hydride (60% dispersion in mineral oil, 35 mg, 0.876 mmol) in THF or DMF (3.5 mL) at 0° C. was added N2-[4-cyano-3-(trifluoromethyl)phenyl]-N1,N1-dimethyl-L-alaninamide (100 mg, 0.35 mmol). The mixture was stirred for 30 min, and then 2-chlorobenzyl bromide (108 mg, 0.525 mmol) was added. The reaction was warmed to room temperature and stirred 4 to 16 hours. (In some circumstances, adding excess reagents or heating at 65-90° C. was necessary to progress a slow reaction.) The reaction was quenched slowly with water and diluted with diethyl ether, and the layers were separated. The organic layer was washed again with water, dried over Na2SO4, concentrated, and the above titled compound was isolated using silica gel chromatography. 1H NMR (400 MHz, CDCl3) δ 7.55 (d, 1H, J=8.8 Hz), 7.42 (dd, 1H, J=1.6, 7.6 Hz), 7.21 (m, 2H), 7.05 (dd, 1H, J=1.2, 7.6 Hz), 6.88 (d, 1H, J=2.4 Hz), 6.69 (dd, 1H, J=2.8, 9.2 Hz), 4.85 (m, 3H), 3.15 (s, 3H), 2.94 (s, 3H), 1.50 (d, 3H, J=6.8 Hz). MS m/z 410 (M++1).
The above titled compound was prepared according to general sequence as outlined in Scheme I using N-(carbobenzyloxy)-L-alanine (reagent A), dimethylamine (reagent B), 2-(trifluoromethyl)-4-fluorobenzonitrile (reagent C), 1-bromo-2-methylpropane (reagent D) and DMF (solvent). MS m/z 342 (M++1)
The above titled compound was prepared according to general sequence as outlined in Scheme I using N-(carbobenzyloxy)-L-alanine (reagent A), dimethylamine (reagent B), 2-(trifluoromethyl)-4-fluorobenzonitrile (reagent C), 1-phenethyl bromide (reagent D) and DMF (solvent). MS m/z 390 (M++1)
The above titled compound was prepared according to general sequence as outlined in Scheme I using N-(carbobenzyloxy)-L-isoleucine (reagent A), dimethylamine (reagent B), 2-(trifluoromethyl)-4-fluorobenzonitrile (reagent C), 3-bromo-2-methyl-1-propene (reagent D) and DMF (solvent). MS m/z 382 (M++1)
The above titled compound was prepared according to general sequence as outlined in Scheme I using N-(carbobenzyloxy)-L-alanine (reagent A), dimethylamine (reagent B), 2-(trifluoromethyl)-4-fluorobenzonitrile (reagent C), 2-bromopropane (reagent D) and DMF (solvent). MS m/z 328 (M++1)
The above titled compound was prepared according to general sequence as outlined in Scheme I using N-(carbobenzyloxy)-L-isoleucine (reagent A), dimethylamine (reagent B), 2-(trifluoromethyl)-4-fluorobenzonitrile (reagent C), 2-chlorobenzyl bromide (reagent D) and DMF (solvent). MS m/z 452 (M++1)
To N2-[4-cyano-3-(trifluoromethyl)phenyl]-N1,N1-dimethyl-N2-(2-methyl-2-propen-1-yl)-L-isoleucinamide (Example 4) (97.5 mg, 0.256 mmol) was added 20 mg of 10% palladium on carbon and 5 mL of ethanol. A hydrogen balloon was attached, and the reaction was stirred overnight. The reaction was filtered through celite, and the filtrate was concentrated. The above titled compound was isolated using silica gel chromatography. 1H NMR (400 MHz, CDCl3) δ 7.60 (d, 1H, J=8.4 Hz), 7.10 (s, 1H), 6.97 (d, 1H, J=8.8 Hz), 4.31 (d, 1H, J=10.4 Hz), 3.34 (dd, 1H, J=8.0, 14.8 Hz), 3.15 (dd, 1H, J=6.0, 14.8 Hz), 2.97 (d, 6H, J=3.6 Hz), 2.27 (m, 1H), 1.93 (m, 1H), 1.27 (m, 2H), 0.89 (m, 12H). MS m/z 384 (M++1)
The above titled compound was prepared according to general sequence as outlined in Scheme I using N-(carbobenzyloxy)-L-valine (reagent A), dimethylamine (reagent B), 2-(trifluoromethyl)-4-fluorobenzonitrile (reagent C), 2-chlorobenzyl bromide (reagent D) and DMF (solvent). MS m/z 438 (M++1)
The above titled compound was prepared according to general sequence as outlined in Scheme I using N-(carbobenzyloxy)-L-valine (reagent A), dimethylamine (reagent B), 2-(trifluoromethyl)-4-fluorobenzonitrile (reagent C), 1-(bromomethyl)-2-(trifluoromethyl)benzene (reagent D) and DMF (solvent). MS m/z 472 (M++1)
The above titled compound was prepared according to general sequence as outlined in Scheme I using N-(carbobenzyloxy)-L-valine (reagent A), dimethylamine (reagent B), 2-(trifluoromethyl)-4-fluorobenzonitrile (reagent C), 3-bromo-2-methyl-1-propene (reagent D) and DMF (solvent). MS m/z 368 (M++1)
The above titled compound was prepared according to general sequence as outlined in Scheme I using N-(carbobenzyloxy)-L-isoleucine (reagent A), dimethylamine (reagent B), 2-(trifluoromethyl)-4-fluorobenzonitrile (reagent C), 1-(bromomethyl)-2-(trifluoromethyl)benzene (reagent D) and DMF (solvent). MS m/z 486 (M++1)
The above titled compound was prepared according to general sequence as outlined in Scheme I using N-(carbobenzyloxy)-L-isoleucine (reagent A), dimethylamine (reagent B), 2-(trifluoromethyl)-4-fluorobenzonitrile (reagent C), (1-bromoethyl)benzene (reagent D) and DMF (solvent). MS m/z 432 (M++1)
The above titled compound was prepared using the procedure set forth in Example 7 using N2-[4-cyano-3-(trifluoromethyl)phenyl]-N1,N1-dimethyl-N2-(2-methyl-2-propen-1-yl)-L-valinamide (Example 10). MS m/z 370 (M++1)
The above titled compound was prepared according to general sequence as outlined in Scheme I using N-(carbobenzyloxy)-D-alanine (reagent A), dimethylamine (reagent B), 2-(trifluoromethyl)-4-fluorobenzonitrile (reagent C), 2-chlorobenzyl bromide (reagent D) and DMF (solvent). MS m/z 410 (M++1)
The above titled compound was prepared according to general sequence as outlined in Scheme I using N-(carbobenzyloxy)-L-alanine (reagent A), dimethylamine (reagent B), 2-(trifluoromethyl)-4-fluorobenzonitrile (reagent C), 3-bromocyclohexene (reagent D) and DMF (solvent). MS m/z 366 (M++1)
The above titled compound was prepared using the procedure set forth in Example 7 using N2-[4-cyano-3-(trifluoromethyl)phenyl]-N2-2-cyclohexen-1-yl-N1,N1-dimethyl-L-alaninamide (Example 15). MS m/z 368 (M++1)
Examples 17-18 were prepared using the procedure set forth in Scheme II.
To a suspension of 3-cyclohexyl-L-alanine (1.36 g, 7.94 mmol) (reagent A) in 80 mL of DMF was added 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent B) (1.0 g, 5.29 mmol) and potassium carbonate (2.19 g, 15.9 mmol). The reaction mixture was heated at 90° C. overnight and cooled to room temperature, diluted with an aqueous LiBr solution, and acidified to pH 3-4 with 6 N HCl. The aqueous layer was extracted three times with ethyl acetate. The combined organic layers were dried over Na2SO4 and concentrated. The crude residue was dissolved in MeOH (50 mL), and 1 mL of concentrated sulfuric acid was added. This mixture was heated at 65° C. for five hours. The reaction was cooled to room temperature and concentrated. The residue was slowly quenched with saturated NaHCO3 and diluted with diethyl ether. The layers were separated, and the organic layer was washed with an aqueous LiBr solution and water. The organic layer was dried over Na2SO4, concentrated, and purified by silica chromatography to afford the title compound. 1H NMR (400 MHz, CDCl3) δ 7.55 (d, 1H, J=8.8 Hz), 6.89 (d, 1H, J=2.4 Hz), 6.69 (dd, 1H, J=2.4, 8.4 Hz), 5.16 (d, 1H, J=8.4 Hz), 4.17 (q, 1H, J=5.6 Hz), 3.76 (s, 3H), 1.71 (m, 7H), 1.43 (m, 1H), 1.22 (m, 3H), 0.97 (m, 2H). MS m/z 355 (M++1)
To an ice cooled suspension of dimethylamine hydrochloride (reagent C) (2.65 g, 32.3 mmol) in toluene (34 mL), trimethylaluminum (2.0 M in toluene, 16.2 mL, 32.3 mmol) was added slowly (observed gas evolution), and the solids gradually went into solution. The reaction mixture was warmed to room temperature, and a solution of methyl N-[4-cyano-3-(trifluoromethyl)phenyl]-3-cyclohexyl-L-alaninate (1.44 g, 4.06 mmol) in 10 mL of toluene was added slowly. The reaction mixture was heated at 50° C. for 16 hours, then cooled to 0° C. Excess aluminium reagent was quenched by slow addition of 80 mL of 0.5 N HCl. Ethyl acetate was added, and the mixture was stirred for 30 min. The mixture was neutralized with saturated NaHCO3. The layers were separated, and the aqueous layer was extracted twice with ethyl acetate. The combined organic layers were dried over Na2SO4, concentrated, and the title compound was isolated by silica gel chromatography. 1H NMR (400 MHz, CDCl3) δ 7.54 (d, 1H, J=8.8 Hz), 6.85 (d, 1H, J=2.4 Hz), 6.66 (dd, 1H, J=2.4, 8.4 Hz), 5.45 (bs, 1H), 4.46 (t, 1H, J=6.8 Hz), 3.15 (s, 3H), 3.02 (s, 3H), 1.85 (m, 1H), 1.67 (m, 6H), 1.43 (m, 1H), 1.23 (m, 3H), 1.00 (m, 2H). MS m/z 368 (M++1)
The title compound was prepared according to the procedure set forth in Example I, Step D from N2-[4-cyano-3-(trifluoromethyl)phenyl]-3-cyclohexyl-N1,N1-dimethyl-L-alaninamide (Example 17, Step B, above) and 2-chlorobenzyl bromide (reagent D). MS m/z 492 (M++1)
The above titled compound was prepared according to general sequence as outlined in Scheme II using DL-phenylglycine (reagent A), 2-(trifluoromethyl)-4-fluorobenzonitrile (reagent B), dimethylamine (reagent C), and 2-chlorobenzyl bromide (reagent D). MS m/z 472 (M++1)
Examples 19-29 were prepared using the sequence outlined in Scheme III.
A mixture of 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A) (500 mg, 2.64 mmol, 1 eq), D-valine (reagent B) (341 mg, 2.91 mmol, 1.1 eq), and K2CO3 (547 mg, 3.96 mmol, 1.5 eq) in DMF (6 mL) was sealed in a 10-20 mL microwave process vial and heated in a microwave reactor for 20 min at 100° C. The reaction mixture was partitioned between ethyl acetate and water and acidified to pH 3 with 1N HCl. The layers were separated, and the organic layer was washed with saturated aqueous sodium carbonate (2-50 mL portions) and dried over sodium sulfate. The residue was purified by ISCO silica gel chromatography (10 g silica cartridge, 100% CH2Cl2 grading to 10% CH3OH/CH2Cl2 over 10 min followed by 10% CH2Cl2 for 10 min) to provide the title compound (320 mg, 42%) as a pale yellow oil. 1H NMR (400 MHz, CD3OD) δ 7.63 (d, 1H, J=8.8 Hz), 7.13 (d, 1H, J=2.0 Hz), 6.88 (dd, 1H, J=8.4, 2.0 Hz), 3.91 (d, 1H, J=6.4 Hz), 2.24 (m, 1H), 1.09 (t, 6H, J=6.8 Hz); LC/MS 287.2 (MH)+.
EDC (249 mg, 1.30 mmol, 1.2 eq) was added in one portion to a solution of N-[4-cyano-3-(trifluoromethyl)phenyl]-D-valine (310 mg, 1.08 mmol, 1 eq), dimethylamine (reagent C) (812 microliters of a 2.0 M solution in THF, 1.62 mmol, 1.5 eq) and DMAP (5 mg) in dichloromethane (5 mL). The resultant pale yellow solution was stirred at room temperature for 36 hours, washed with water (1-25 mL portion), dried over sodium sulfate and concentrated. The residue was purified by ISCO silica gel chromatography (10 g silica cartridge, 100% CH2Cl2 grading to 10% CH3OH/CH2Cl2 over 20 min followed by 10% CH2Cl2 for 10 min) to provide the title compound (122 mg, 36%) as a white foam. 1H NMR (400 MHz, CDCl3) δ 7.55 (d, 1H, J=8.8 Hz), 6.91 (d, 1H, J=2.4 Hz), 6.74 (dd, 1H, J=8.4, 2.4 Hz), 5.32 (br s, 1H), 4.45 (br s, 1H), 3.16 (s, 3H), 3.02 (s, 3H), 2.13 (m, 1H), 1.06 (d, 3H, J=6.8 Hz), 1.00 (d, 3H, J=6.8 Hz); LC/MS 314.2 (MH)+.
Sodium hydride (44 mg of a 60% dispersion in mineral oil, 1.1 mmol, 3 eq) was added to a cold (0° C.) solution of N2-[4-cyano-3-(trifluoromethyl)phenyl]-N1,N1-dimethyl-D-valinamide in DMF (2 mL). The reaction mixture was allowed to warm to room temperature and then stirred at room temperature for 45 min. The bright yellow reaction mixture was then cooled to 0° C., and 2-chlorobenzyl bromide (reagent D) (154 microliters, 226 mg, 1.1 mmol, 3 eq) was added via syringe. The reaction mixture was stirred for 2 h at 0° C., and then excess hydride was quenched by the addition of water (1 mL). The reaction mixture was partitioned between ethyl acetate and water, and the layers were separated. The organic layer was washed with saturated aqueous sodium chloride (3-25 mL portions), and the combined aqueous washed were back-extracted with ethyl acetate (1-25 mL portion). The combined organics were dried over sodium sulfate and were concentrated. The residue was purified by ISCO silica gel chromatography (10 g silica cartridge, 100% CH2Cl2 for 5 min, then grading to 10% CH3OH/CH2Cl2 over 15 min, followed by 10% CH2Cl2 for 5 min) to provide the title compound (105 mg, 65%) as a white foam. 1H NMR (400 MHz, CDCl3) δ 7.57 (d, 1H, J=8.8 Hz), 7.43 (d, 1H, J=1.2 Hz), 7.19 (t, 1H, J=6.4 Hz), 7.11 (m, 2H), 6.81 (dd, 1H, J=6.4, 2.4 Hz), 6.74 (d, 1H, J=7.6 Hz), 5.07 (d, 1H, 18 Hz), 4.58 (t, 1H, 10 Hz), 3.11 (s, 3H), 2.76 (s, 3H), 2.72 (m, 1H), 1.02 (d, 3H, J=6.4 Hz), 0.94 (d, 3H, J=7.2 Hz);
LC/MS 438.4 (MH)+.
The above titled compound was prepared according to general sequence outlined in Scheme III using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), L-3,4-dimethoxyphenylalanine (reagent B), dimethylamine (reagent C), and 2-chlorobenzyl bromide (reagent D). MS m/z 546.2 (M++1).
The above titled compound was prepared according to general sequence outlined in Scheme III using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), 3-(2-pyridinyl)alanine (reagent B), dimethylamine (reagent C), and 2-chlorobenzyl bromide (reagent D). MS m/z 486.6 (M+).
The above titled compound was prepared according to general sequence outlined in Scheme III using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), L-leucine (reagent B), dimethylamine (reagent C), and 2-chlorobenzyl bromide (reagent D). MS m/z 541.4 (M+).
The above titled compound was prepared according to general sequence outlined in Scheme III using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), D-leucine (reagent B), dimethylamine (reagent C), and 2-chlorobenzyl bromide (reagent D). MS m/z 541.6 (M+).
The above titled compound was prepared according to general sequence outlined in Scheme III using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), D-norleucine (reagent B), dimethylamine (reagent C), and 2-chlorobenzyl bromide (reagent D). MS m/z 541.6 (M+).
The above titled compound was prepared according to general sequence outlined in Scheme III using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), L-norleucine (reagent B), dimethylamine (reagent C), and 2-chlorobenzyl bromide (reagent D). MS m/z 541.6 (M+).
The above titled compound was prepared according to general sequence outlined in Scheme III using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), (S)-2-aminobutanoic acid (reagent B), dimethylamine (reagent C), and 2-chlorobenzyl bromide (reagent D). MS m/z 424.2 (M++1).
The above titled compound was prepared according to general sequence outlined in Scheme III using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), (R)-2-aminobutanoic acid (reagent B), dimethylamine (reagent C), and 2-chlorobenzyl bromide (reagent D). MS m/z 424.2 (M++1).
The above titled compound was prepared according to general sequence outlined in Scheme III using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), L-valine (reagent B), dimethylamine (reagent C), and 1-bromo-2,2-dimethylpropane. MS m/z 384.4 (M++1).
The above titled compound was prepared according to general sequence outlined in Scheme III using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), alanine (reagent B), dimethylamine (reagent C), and 1-(bromomethyl)-2-chlorobenzene (reagent D). MS m/z 360.0 (M++1).
Examples 30-58 were prepared using the sequence outlined in Scheme IV.
To a solution of 4-flouro-2-(trifluouromethyl)benzonitrile (reagent A) (500 mg, 2.6 mmol) in anhydrous DMF (0.5 M) was added 2-methoxybenzylamine (reagent B) (0.35 mL, 2.6 mmol) and oven-dried potassium carbonate (365 mg, 2.6 mmol). The reaction mixture stirred at 85° C. for 18 hours. After cooling to room temperature, the reaction mixture was diluted with water. The organics were extracted into ethyl ether and dried over sodium sulfate. The filtrate was concentrated, and remaining DMF was removed under reduced pressure to yield a beige solid (415 mg, 51% crude yield): MS (ESI) 306.3 (MH)+.
To a solution of dimethylamine (reagent D) (2.0M in THF, 30 mL) was added 2-bromopropionyl bromide (reagent C) (8.7 g, 0.04 mmol) at 0° C. The resulting mixture was kept stirring at 0° C. for additional 10 min. After the reaction was filtered the filtrate was washed with very dilute HCl and dried over sodium sulfate. Solvent was removed to give 5.12 g (70% yield) of the title compound as a colorless oil. MS m/e 180.0 (M+H)+.
To an ice cold suspension of sodium hydride (60% in mineral oil, 25 mg, 0.64 mmol) in anhydrous DMF was added 4-({[2-(methyloxy)phenyl]methyl}amino)-2-(trifluoromethyl)benzonitrile (Step A) (50.0 mg, 0.16 mmol). After stirring at 0° C. for 30 to 45 min, a solution of 2-bromo-N,N-dimethylpropanamide (Step B) (88.0 mg, 0.49 mmol) in DMF (0.5 mL) was added dropwise to the cold amine solution. After stirring at room temperature for 18 hours, the crude reaction mixture was quenched with H2O then slowly poured into water. The aqueous phase was extracted three times with diethyl ether, and the organic extracts were combined and concentrated. The oily residue was purified by HPLC (Xterra Prep RP, 100×30 mm, 40 mL/min, A: acetonitrile B: water, A: 10-90% during 10 min, UV detection at 214 nM) to yield 6.5 mg (10% yield) of the title compound as a yellow solid: MS (ESI) 406.0 (MH)+; 1H NMR (400 MHz, CDCl3) δ 7.56(d, J=8.8 Hz, 1H), 7.27 (d, J=8.8 Hz, 1H), 6.97-6.87 (m, 4H), 6.76 (dd, J=2.8 and 8.8 Hz. 1H), 4.87 (q, 1H), 4.71 (s, 2H), 3.89 (s, 3H), 3.08 (s, 3H), 2.92 (s, 3H), 1.50 (d, J=6.8Hz, 3H)
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), 2-methylbenzylamine (reagent B), 2-bromopropionyl bromide (reagent C), and dimethylamine (reagent D). MS (ESI) 390.2 (MH)+
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), (2-furanylmethyl)amine (reagent B), 2-bromopropionyl bromide (reagent C), and dimethylamine (reagent D). MS (ESI) 366.0 (MH)+
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), methylamine (reagent B), 2-bromopropionyl bromide (reagent C), and dimethylamine (reagent D). MS m/e 300.2 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), ethylamine (reagent B), 2-bromopropionyl bromide (reagent C), and dimethylamine (reagent D). MS m/e 300.2 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), methylamine (reagent B), 2-broniobutyryl bromide (reagent C), and dimethylamine (reagent D). MS m/e 314.2 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), ethylamine (reagent B), 2-bromobutyryl bromide (reagent C), and dimethylamine (reagent D). MS m/e 328.2 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), (2-furanylmethyl)amine (reagent B), 2-bromohexanoyl bromide (reagent C), and dimethylamine (reagent D). MS m/e 408.2 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), (2-thienylmethyl)amine (reagent B), 2-bromobutyryl bromide (reagent C), and dimethylamine (reagent D). MS m/e 396.2 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), (2-furanylmethyl)amine (reagent B), 2-bromobutyryl bromide (reagent C), and dimethylamine (reagent D). MS m/e 380.4 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), [(2-chlorophenyl)methyl]amine (reagent B), 2-bromobutyryl bromide (reagent C), and dimethylamine (reagent D). MS m/e 424.2 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), (2-pyridinylmethyl)amine (reagent B), 2-bromobutyryl bromide (reagent C), and dimethylamine (reagent D). MS m/e 391.2 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), [(2-fluorophenyl)methyl]amine (reagent B), 2-bromopropionyl bromide (reagent C), and dimethylamine (reagent D). MS m/e 394.2 (M+M)+
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), [(2-trifluoromethylphenyl)methyl]amine (reagent B), 2-bromopropionyl bromide (reagent C), and dimethylamine (reagent D). MS m/e 444.2 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), [(4-trifluoromethylphenyl)methyl]amine (reagent B), 2-bromopropionyl bromide (reagent C), and dimethylamine (reagent D). MS m/e 444.2 (M+H)+
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), benzylamine (reagent B), 2-bromopropionyl bromide (reagent C), and dimethylamine (reagent D). MS m/e 376.2 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), [(2-methyloxyphenyl)methyl]amine (reagent B), 2-bromobutanoyl bromide (reagent C), and dimethylamine (reagent D). MS m/e 420.2 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), [(2-methylphenyl)methyl]amine (reagent B), 2-bromobutanoyl bromide (reagent C), and dimethylamine (reagent D). MS m/e 404.4 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), [(2-fluorophenyl)methyl]amine (reagent B), 2-bromobutanoyl bromide (reagent C), and dimethylamine (reagent D). MS m/e 408.4 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), [(3-trifluoromethylphenyl)methyl]amine (reagent B), 2-bromobutanoyl bromide (reagent C), and dimethylamine (reagent D). MS m/e 458.2 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), [(4-trifluoromethylphenyl)methyl]amine (reagent B), 2-bromobutanoyl bromide (reagent C), and dimethylamine (reagent D). MS m/e 458.0 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), benzylamine (reagent B), 2-bromobutanoyl bromide (reagent C), and dimethylamine (reagent D). MS m/e 390.2 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), 2-thienylmethyl)amine (reagent B), 2-bromobutanoyl bromide (reagent C), and dimethylamine (reagent D). MS m/e 382.2 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), {[3,4-bis(methyloxy)phenyl]methyl}amine (reagent B), 2-bromobutanoyl bromide (reagent C), and dimethylamine (reagent D). MS m/e 450.4 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), [(3-methyl-2-thienyl)methyl]amine (reagent B), 2-bromobutanoyl bromide (reagent C), and dimethylamine (reagent D). MS m/e 410.2 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), [(5-methyl-2-furanyl)methyl]amine (reagent B), 2-bromobutanoyl bromide (reagent C), and dimethylamine (reagent D). MS m/e 394.0 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 2-chloro-4-fluorobenzonitrile (reagent A), (2-phenylethyl)amine (reagent B), 2-bromopropionyl bromide (reagent C), and dimethylamine (reagent D). MS m/e 356.2 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 2-chloro-4-fluorobenzonitrile (reagent A), [2-(2-chlorophenyl)ethyl]amine (reagent B), 2-bromopropionyl bromide (reagent C), and dimethylamine (reagent D). MS m/e 390.0 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme IV using 2-chloro-4-fluorobenzonitrile (reagent A), (2-thienylmethyl)amine (reagent B), 2-bromohexanoyl bromide (reagent C), and dimethylamine (reagent D). MS m/e 424.2 (M+H)+.
Examples 59 and 60 were prepared using the sequence outlined in Scheme V.
To a slurry of 4-amino-2-(trifluoromethyl)benzonitrile (reagent A) (30.09 g, 162 mmol) and sodium cyanoborohydride (21.35 g, 340 mmol) in dichloromethane (160 mL) at ice bath temperature was added trifluoroacetic acid (160 mL, 2.08 mol). Trifluoroacetaldehyde hydrate (reagent B) (52.2 g, 405 mmol) was then added over 5 min. The mixture was stirred 10 min and warmed to room temperature. After 41 hours, the mixture was slowly poured into saturated sodium bicarbonate aqueous solution. Organic and aqueous phases of the filtrate were separated, and the aqueous layer extracted three times with dichloromethane. Combined organic extracts were concentrated to dryness. The oil residues were then purified by silica chromatography yielded the title compound as slightly tan plates, mp 132.5-134° C. 1H NMR (300 MHz, MeOH-d4) δ 7.59 (d, 1H), 7.05 (d, 1H), 6.92 (dd, 1H), 3.92 (q, 2H). MS m/z 268 (M+)
To a solution of 2-bromopentanoic acid (reagent C) (4.0 g, 22.1 mmol) in 30 mL dichloromethane was slowly added oxalyl chloride (4.2 gram, 33.1 mmol). The solution was refluxed two hours then cooled to room temperature. The solvent was removed and the residue was redissolved with 20 mL of dichloromethane. Dimethylamine (reagent D) (22 mL of 1.0 M THF solution, 44.2 mmol) was added and the mixture was stirred 30 min at room temperature. Aqueous 1N HCl was added to the reaction mixture, whereupon the organic portion was extracted using ethyl acetate. The organic layer was washed twice with saturated sodium bicarbonate and once with brine then dried over sodium sulfate. The oily residue was used in the next step without further purification.
C. N2-[4-cyano-3-(trifluoromethyl)phenyl]-N1,N1-dimethyl-N2-(2,2,2-trifluoroethyl)norvalinamide
To an ice cooled solution of 4-[(2,2,2-trifluoroethyl)amino]-2-(trifluoromethyl) benzonitrile (Step A) (250 mg, 0.94 mmol) in DMF (5 mL) was added sodium hydride (45 mg, 1.88 mmol). After stirring at 0° C. for 20 min, 2-bromo-N,N-dimethylpentanamide (Step B) (293 mg, 1.41 mmol) was added. The reaction was warmed to room temperature and continued to stir at this temperature for two hours. The reaction mixture was poured into water and the solution was extracted two times with diethyl ether. The organic layer was dried over sodium sulfate and concentrated. The oily residue was purified by silica gel chromatography. 1H NMR (300 MHz, CDCl3-d) δ 7.72 (d, 1H), 7.18 (d, 1H), 7.05 (dd, 1H), 4.61 (m, 1H), 4.06 (m, 2H), 2.98 (s, 6H), 2.03 (m, 1H), 1.59 (m, 1H), 1.35 (m, 2H), 0.97 (t, 3H); MS m/z 395 (M+)
The above titled compound was prepared according to general sequence outlined in Scheme V using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromohexanoic acid (reagent C), and dimethylamine (reagent D). MS m/z 409 (M+)
Examples 61-111 were prepared using the sequence outlined in Scheme VI.
To a slurry of 4-amino-2-(trifluoromethyl)benzonitrile (reagent A) (30.09 g, 162 mmol) and sodium cyanoborohydride (21.35 g, 340 mmol) in dichloromethane (160 mL) at ice bath temperature was added trifluoroacetic acid (160 mL, 2.08 mol). Trifluoroacetaldehyde hydrate (reagent B) (52.2 g, 405 mmol) was then added over 5 min. The mixture was stirred 10 min and warmed to room temperature. After 41 hours, the mixture was slowly poured into saturated sodium bicarbonate aqueous solution. Organic and aqueous phases of the filtrate were separated, and the aqueous layer extracted three times with dichloromethane. Combined organic extracts were concentrated to dryness. The oil residues were then purified by silica chromatography yielded the title compound as slightly tan plates, mp 132.5-134° C. 1H NMR (300 MHz, MeOH-d4) δ 7.59 (d, 1H), 7.05 (d, 1H), 6.92 (dd, 1H), 3.92 (q, 2H). MS m/z 268 (M+)
To an ice cooled solution of 4-(2,2,2-trifluoroethylamino)-2-trifluoromethyl-benzonitrile (1.5 g; 5.6 mmol) in DMF (30 mL) was added sodium hydride (269 mg; 11.2 mmol). After stirred at 0° C. for 20 min, 1,1-dimethylethyl 2-bromopropanoate (reagent C) (2.9 g, 14.1 mmol) was added. The reaction mixture was warmed to room temperature and continued to stir at this temperature for one hour. The reaction mixture was poured into water and the solution was extracted three times with diethyl ether. The organic layer dried over sodium sulfate and concentrated down. The oil residues were then purified by silica chromatography.
1,1-dimethylethyl-N-[4-cyano-3-(trifluoromethyl)phenyl]-N-(2,2,2-trifluoroethyl)alaninate (1 g, 2.53 mmol) was dissolved in dichloromethane (5 mL), and to the solution was added triethylsilane (2 mL) followed by trifluoroacetic acid (2 mL). The resulting solution was stirred 17 hours at room temperature and concentrated in vacuo. The residue was dissolved in 1N NaOH and washed three times with diethyl ether. The aqueous layer was acidified to pH 1 by 1N HCl (aq) and extracted three times with ethyl acetate. The combined organics were dried over Na2SO4 and concentrated to dryness. The crude product was not purified before the next step.
To a slurry of N-[4-cyano-3-(trifluoromethyl)phenyl]-N-(2,2,2-trifluoroethyl)alanine (1.0 g, 2.94 mmol) in anhydrous dichloromethane (20 mL) was added oxalyl chloride (933 mg, 7.35 mmol) over 5 min. The mixture was brought to reflux under nitrogen. After 3 hours, the solution was cooled, and the solvent was evaporated. The residue was redissolved with 10 mL of dichloromethane. Diisobutylamine (reagent D) (1.90 g, 14.7 mmol) was added and the reaction was stirred at room temperature for one hour. The solvent was then removed and the crude product was purified by silica gel chromatography. 1H NMR (300 MHz, CDCl3-d) δ 7.68 (d, 1H), 7.18 (s, 1H), 7.06 (d, 1H), 4.85 (m, 1H), 4.20 (m, 2H), 3.20 (m, 4H), 1.97 (m, 2H), 1.55 (d, 3H), 0.90 (m, 12H). MS m/z 452 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and dibutylamine (reagent D). MS m/z 452 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and N,2-dimethyl-2-propanamine (reagent D). MS m/z 410 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and N-methylpropargylamine (reagent D). MS m/z 392 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and N-ethylpropylamine (reagent D). MS m/z 410 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and N-ethylisopropylamine (reagent D). MS m/z 410 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and N-ethylmethylamine (reagent D). MS m/z 382 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and dipropylamine (reagent D). MS m/z 424 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and diethylamine (reagent D). MS m/z 396 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and piperidine (reagent D). MS m/z 408 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and azetidine (reagent D). MS m/z 380 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and N-methyl-N-propylamine (reagent D). MS m/z 396 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and (butylamino)acetonitrile (reagent D). MS m/z 435 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and N-(2-methoxyethyl)-N-propylamine (reagent D). MS m/z 440 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and 2,2′-iminodiacetonitrile (reagent D). MS m/z 418 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and morpholine (reagent D). MS m/z 410 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and (cyclopropylmethyl)propylamine (reagent D). MS m/z 436 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and N-cyclohexylmethylamine (reagent D). MS m/z 436 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and N-(2-methoxyethyl)methylamine (reagent D). MS m/z 412 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and thiomorpholine (reagent D). MS m/z 426 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and 3-(methylamino)propanenitrile (reagent D). MS m/z 407 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and pyrrolidine (reagent D). MS m/z 394 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and N-methylisopropylamine (reagent D). MS m/z 396 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and di-2-propen-1-ylamine (reagent D). MS 7m/z 420 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromopropionic acid (reagent C), and N-methylallylamine (reagent D). MS m/z 394 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and dibutylamine (reagent D). MS m/z 466 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and N,2-dimethyl-2-propanamine (reagent D). MS m/z 424 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and (methylamine)acetonitrile (reagent D). MS m/z 405 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and N-ethylpropylamine (reagent D). MS m/z 424 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and N-ethylisopropylamine (reagent D). MS m/z 424 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and diisobutylamine (reagent D). MS m/z 466 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and N-ethylmethylamine (reagent D). MS m/z 396 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and dipropylamine (reagent D). MS m/z 438 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and diethylamine (reagent D). MS m/z 410 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and piperidine (reagent D). MS m/z 422 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and azetidine (reagent D). MS m/z 394 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and N-methylpropylamine. (reagent D). MS m/z 410 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and N-butylaminoacetonitrile (reagent D). MS m/z 449 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and N-(2-methoxyethyl)-N-propylamine (reagent D). MS m/z 454 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and 2,2′-iminodiacetonitrile (reagent D). MS m/z 432 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and morpholine (reagent D). MS m/z 424 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and (cyclopropylmethyl)methylamine (reagent D). MS m/z 450 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and N-methylcyclohexylamine (reagent D). MS m/z 450 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and thiomorpholine (reagent D). MS m/z 440 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and N-(2-methoxyethyl)methylamine (reagent D). MS m/z 426 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and 3-(methylamino)propanenitrile (reagent D). MS m/z 421 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and pyrrolidine (reagent D). MS m/z 408 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and N-methylisopropylamine (reagent D). MS m/z 410 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and di-2-propen-1-ylamine (reagent D). MS m/z 434 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and thiazolidine (reagent D). MS m/z 426 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VI using 4-amino-2-(trifluoromethyl)benzonitrile (reagent A), trifluoroacetaldehyde hydrate (reagent B), 2-bromobutanoic acid (reagent C), and N-methyl-allylamine (reagent D). MS m/z 408 (M++1)
Examples 112-117 were prepared using the sequence outlined in Scheme VII.
Freshly oven dried potassium carbonate (5.5 g, 39.75 mmol) was added to the 50 mL DMF solution of 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A) (5 g, 26.5 mmol) and 2-trifluoromethylbenzylamine (reagent B) (5.6 g, 31.7 mmol). The reaction was heated at 95° C. for two hours before cooling to room temperature. The reaction was diluted with water then extracted with diethyl ether three times. The organic layer was dried over Na2SO4, then purified by silica chromatography.
The title compound was prepared according to the procedure given in Example 61, part B using 2-(trifluoromethyl)-4-({[2-(trifluoromethyl)phenyl]methyl}amino)benzonitrile and 1,1-dimethylethyl 2-bromopropionate (reagent C).
The title compound was prepared according to the procedure given in Example 61, part C starting with N-[4-cyano-3-(trifluoromethyl)phenyl]-N-{[2-(trifluoromethyl)phenyl]methyl}alanine.
The title compound was prepared according to the procedure given in Example 61, part D using N-[4-cyano-3-(trifluoromethyl)phenyl]-N-{[2-(trifluoromethyl)phenyl]methyl}alanine and dimethylamine (reagent D). 1H NMR (300 MHz, CDCl3-d) δ 7.72 (d, 1H), 7.55 (d, 1H), 7.45 (m, 1H), 7.37 (m, 1H), 7.25 (m, 1H), 6.85 (s, 1H), 6.66 (m, 1H), 5.05 (m, 1H), 4.91 (m, 2H), 3.10 (s, 3H), 2.98 (s, 3H), 1.49 (d, 3H). MS m/z 444 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VII using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), 2,2-dimethyl-1-propanamide (reagent B), 1,1-dimethylethyl 2-bromopropionate (reagent C), and dimethylamine (reagent D). MS m/z 356 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VII using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), 3,3-dimethyl-1-butanamine (reagent B), 1,1-dimethylethyl 2-bromopropionate (reagent C), and dimethylamine (reagent D). MS m/z 370 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VII using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), 3,3,3-trifluoropropanamine (reagent B), 1,1-dimethylethyl 2-bromopropionate (reagent C), and dimethylamine (reagent D). MS m/z 382 (M++1)
The above titled compound was prepared according to general sequence outlined in Scheme VII using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), 2,2-bis(methyloxy)ethanamine (reagent B), 1,1-dimethylethyl 2-bromopropionate (reagent C), and dimethylamine (reagent D). MS m/z 373 (M++22)
The above titled compound was prepared according to general sequence outlined in Scheme VII using 4-fluoro-2-(trifluoromethyl)benzonitrile (reagent A), 2,2-dimethylpropanamine (reagent B), 1,1-dimethylethyl 2-bromohexanoate (reagent C), and dimethylamine (reagent D). MS m/z 370 (M++1)
Examples 118-122 were prepared using the sequence outlined in Scheme VIIsI.
To a solution of dimethyl amine (reagent B) (2.0M in THF, 30 mL) was added 2-bromopropanoyl bromide (reagent A) (8.7 g, 0.04 mmol) at 0° C. The resulting mixture was kept stirring at 0° C. for additional 10 mins. After the reaction was filtered the filtrate was washed with very dilute HCl and dried over sodium sulfate. Solvent was removed to give 5.12 g (70% yield) of the title compound as a colorless oil MS m/e 180.0 (M+H)+. The title compound was carried over to the next step without further purification.
4-Aminobenzonitrile (0.0673 g, 0.57 mmol) (reagent C) was added to a suspension of NaH (60% in mineral oil, 0.16 g, 3.9 mmol) in DMF (3 mL) at 0° C. After stirring for 5 min, 2-bromo-N,N-dimethylpropanamide (Step A) (0.112 g, 0.62 mmol) was added and the reaction mixture was stirred at 55° C. for 3 h. To this crude reaction mixture was added 1-(bromomethyl)-2-chlorobenzene (reagent D) (0.127 g, 0.62 mmol) and the reaction mixture was stirred at 55° C. for additional 3 h. (In some circumstances, heating at 60-120° C. was necessary to progress a slow reaction). After cooling to room temperature, excess sodium hydride was quenched with saturated NH4Cl, and the reaction mixture was extracted with EtOAc. The organic layer was dried over Na2SO4, concentrated and purified via preparative HPLC (XTerra PreP RP, 19×150 mm, 19 mL/min, A: acetonitrile B: water, A: 25 to 95% over 15 min, UV detection at 214 nm) to give the title compound as a light yellow solid (19 mg, 10%). 1H NMR (400 MHz, CDCl3) δ 7.461 (m, 2H), 7.413 (dd, 1H, J=1.6 Hz, 7.6 Hz), 7.193 (m, 2H), 7.073 (m, 1H), 6.620 (dd, 2H, J=2 Hz, 7.2 Hz), 4.910 (m, 1H), 4.755 (m, 2H), 3.101 (s, 3H), 2.910 (s, 3H), 1.479 (d, 3H, J=6.8 Hz). MS m/e 342.2 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme VIII using 2-bromopropionyl bromide (reagent A), dimethylamine (reagent B), 4-amino-2-trifluoromethylbenzonitrile (reagent C), and 1-bromo-2,2-dimethylpropane (reagent D). MS m/e 398.2 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme VIII using 2-bromopropionyl bromide (reagent A), dimethylamine (reagent B), 4-fluoro-2-chlorobenzonitrile (reagent C), and iodoethane (reagent D). MS m/e 280.2 (M+H)+.
The above titled compound was prepared according to general sequence outlined in Scheme VIII using 2-bromopropionyl bromide (reagent A), dimethylamine (reagent B), 4-fluoro-2-chlorobenzonitrile (reagent C), and [2-(chloromethyl)phenyl]methylbromide (reagent D). 1H NMR (400 MHz, CDCl3) δ 7.435 (m, 2H), 7.218 (m, 2H), 7.033 (m, 1H), 6.668 (d, 1H, J=2.8 Hz), 6.491 (dd, 1H, J=2.8 Hz, 8.8 Hz), 4.863 (m, 1H), 4.761 (s, 2H), 3.114 (s, 3H), 1.484 (d, 3H, J=7.2 Hz).
The above titled compound was prepared according to general sequence outlined in Scheme VIII using 2-bromo-2-methylpropionyl bromide (reagent A), dimethylamine (reagent B), 4-fluoro-2-trifluoromethylbenzonitrile (reagent C), and iodoethane (reagent D). MS m/e 328.4 (M+H)+
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/US06/14286 | 4/14/2006 | WO | 00 | 10/15/2007 |
| Number | Date | Country | |
|---|---|---|---|
| 60671592 | Apr 2005 | US |
