2-amino-N-(2,2,2-trifluoroethyl)acetamide

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Stir a mixture of 2-Amino-N-(2,2,2-trifluoro-ethyl)-acetamide (156 mg, 1 mmol), 2-[5-(3,5-dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-thieno[2,3-b]pyridine-5-carboxylic acid (160 mg, 0.24 mmol), HATU (150 mg, 0.39 mmol) and DIPEA (0.2 mL) at room temperature for 10 hours. After removal of solvent, purify the mixture by preparative-HPLC to afford 2-(5-(3,5-dichlorophenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazol-3-yl)-N-(2-oxo-2-(2,2,2-trifluoroethylamino)ethyl)thieno[2,3-b]pyridine-5-carboxamide as a white solid (50 mg, 34.78%). MS (m/z): 599 (M+1). 1H NMR (400 MHz, CDCl3) δ 9.02 (s, 1H), 8.51 (s, 1H), 7.52 (s, 2H), 7.44-7.41 (m, 2H), 7.22 (s, 1H), 6.64 (s, 1H), 4.27 (d, J=5.2, 2H), 4.17 (d, J=16.8, 1H), 4.04-3.95 (m, 2H), 3.80 (d, J=16.08, 1H). After removal of solvent purify the mixture by preparative-HPLC

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Stir a mixture of 2-Amino-N-(2,2,2-trifluoro-ethyl)-acetamide (156 mg, 1 mmol), 2-[5-(3,5-dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-thieno[2,3-b]pyridine-5-carboxylic acid (160 mg, 0.24 mmol), HATU (150 mg, 0.39 mmol) and DIPEA (0.2 mL) at room temperature for 10 hours. After removal of solvent, purify the mixture by preparative-HPLC to afford 2-(5-(3,5-dichlorophenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazol-3-yl)-N-(2-oxo-2-(2,2,2-trifluoroethylamino)ethyl)thieno[2,3-b]pyridine-5-carboxamide as a white solid (50 mg, 34.78%). MS (m/z): 599 (M+1). 1H NMR (400 MHz, CDCl3) δ 9.02 (s, 1H), 8.51 (s, 1H), 7.52 (s, 2H), 7.44-7.41 (m, 2H), 7.22 (s, 1H), 6.64 (s, 1H), 4.27 (d, J=5.2, 2H), 4.17 (d, J=16.8, 1H), 4.04-3.95 (m, 2H), 3.80 (d, J=16.08, 1H). After removal of solvent purify the mixture by preparative-HPLC

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Stir a mixture of 2-Amino-N-(2,2,2-trifluoro-ethyl)-acetamide (156 mg, 1 mmol), 2-[5-(3,5-dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-thieno[2,3-b]pyridine-5-carboxylic acid (160 mg, 0.24 mmol), HATU (150 mg, 0.39 mmol) and DIPEA (0.2 mL) at room temperature for 10 hours. After removal of solvent, purify the mixture by preparative-HPLC to afford 2-(5-(3,5-dichlorophenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazol-3-yl)-N-(2-oxo-2-(2,2,2-trifluoroethylamino)ethyl)thieno[2,3-b]pyridine-5-carboxamide as a white solid (50 mg, 34.78%). MS (m/z): 599 (M+1). 1H NMR (400 MHz, CDCl3) δ 9.02 (s, 1H), 8.51 (s, 1H), 7.52 (s, 2H), 7.44-7.41 (m, 2H), 7.22 (s, 1H), 6.64 (s, 1H), 4.27 (d, J=5.2, 2H), 4.17 (d, J=16.8, 1H), 4.04-3.95 (m, 2H), 3.80 (d, J=16.08, 1H). After removal of solvent purify the mixture by preparative-HPLC

Conditions: temp:25.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 2-amino-N-(2,2,2-trifluoroethyl)acetamide (21.90 g, 0.14 mol) in 1,2-dichloroethane (80 mL) was added dropwise over 15 min to a solution of the product of Example 7, Step A (32.50 g, 0.14 mol) in 1,2-dichloroethane (160 mL) at a temperature of 25 to 30° C. The resulting mixture was further stirred for 10 min at 25° C. A solution of triethylamine (14.20 g, 0.14 mol) in 1,2-dichloroethane (80 mL) was then added dropwise over 44 min at 25° C., and the mixture was stirred further for 20 min at 25° C. The solvent was removed under reduced pressure, and the residue was dissolved in hot acetonitrile (50 mL). The mixture was then cooled to 25° C., and water (40 mL) was added dropwise. The mixture was further cooled to 0° C. and filtered. The isolated solid was washed with water (100 mL) and dried overnight in a vacuum oven (approximately 16-33 kPa at 50° C.) to provide the title product as an off-white solid (37 g, 75% yield) melting at 169-169° C. the mixture was stirred further for 20 min at 25° C The solvent was removed under reduced pressure the residue was dissolved in hot acetonitrile (50 mL) The mixture was then cooled to 25° C. water (40 mL) was added dropwise The mixture was further cooled to 0° C. filtered The isolated solid was washed with water (100 mL) dried overnight in a vacuum oven (approximately 16-33 kPa at 50° C.)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 5-[5-(3,5-Bistrifluoromethylphenyl)-5-trifluoromethyl-4,5-dihydroisoxazol-3-yl]-indolizine-8-carboxylic acid (50 mg), 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDAC.HCl, 22.5 mg), 1-hydroxybenzotriazole monohydrate (HOBt.H2O, 20 mg) and N-methylmorpholine (22 μL) were stirred in a mixture of DMF-DCM (½, 1 mL) for 20 minutes at room temperature prior to adding 2-amino-N-(2,2,2-trifluoroethyl)acetamide (50 mg, Ukrorgsynthesis Ltd. Kiev, UKRAINE). The reaction mixture was stirred overnight at room temperature. The mixture was diluted with water and EA. The organic layer was collected, washed with brine, dried over magnesium sulfate, filtered and concentrated under reduced pressure to give a residue that was purified by chromatography (SiO2, DCM/MeOH) to afford the title compound as an orange-reddish solid (11.1 mg, 17%). MS (ES): M/Z [M+H]=649. 1H NMR (400 MHz, CHLOROFORM-d): 3.88-4.04 (m, 3H), 4.33 (d, J=5.3 Hz, 2H), 4.39 (d, J=16.6 Hz, 1H), 6.84 (d, J=7.4 Hz, 1H), 7.05-7.08 (m, 1H), 7.08-7.21 (m, 3H), 7.33 (t, J=4.9 Hz, 1H), 8.01 (s, 1H), 8.13 (s, 2H), 8.72 (d, J=1.8 Hz, 1H). 19F NMR (376 MHz, CHLOROFORM-d): −80.0 (s, 3F), −72.9 (t, J=9.2 Hz, 3F), −63.3 (s, 6F). The organic layer was collected washed with brine dried over magnesium sulfate filtered concentrated under reduced pressure to give a residue that was purified by chromatography (SiO2, DCM/MeOH)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: DIPEA (0.20 mL, 1.26 mmol), PyBOP (245 mg, 0.47 mmol) and 2-amino-N-(2,2,2-trifluoroethyl)acetamide (90 mg, 0.47 mmol) were added to a stirred solution of (E)-2-bromo-4-(3-(3,5-dichloro-4-hydroxyphenyl)-4,4,4-trifluorobut-1-enyl)benzoic acid (200 mg, 0.42 mmol, 66% purity) in CH2Cl2 (5 mL) at ambient temperature. The resulting mixture was then stirred for 12 h. The reaction mixture was diluted with CH2Cl2, washed with 1N HCl, followed by saturated sodium bicarbonate solution, brine solution and water. The organic layer was dried (Na2SO4), filtered, concentrated under vacuum. The residue was purified by column chromatography on silica (100-200 mesh) eluting with 30% EtOAc in petroleum ether to give the title compound as light green solid (130 mg, 52%). washed with 1N HCl The organic layer was dried (Na2SO4) filtered concentrated under vacuum The residue was purified by column chromatography on silica (100-200 mesh) eluting with 30% EtOAc in petroleum ether

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: DIPEA (0.20 mL, 1.26 mmol), PyBOP (245 mg, 0.47 mmol) and 2-amino-N-(2,2,2-trifluoroethyl)acetamide (90 mg, 0.47 mmol) were added to a stirred solution of (E)-2-bromo-4-(3-(3,5-dichloro-4-hydroxyphenyl)-4,4,4-trifluorobut-1-enyl)benzoic acid (200 mg, 0.42 mmol, 66% purity) in CH2Cl2 (5 mL) at ambient temperature. The resulting mixture was then stirred for 12 h. The reaction mixture was diluted with CH2Cl2, washed with 1N HCl, followed by saturated sodium bicarbonate solution, brine solution and water. The organic layer was dried (Na2SO4), filtered, concentrated under vacuum. The residue was purified by column chromatography on silica (100-200 mesh) eluting with 30% EtOAc in petroleum ether to give the title compound as light green solid (130 mg, 52%). washed with 1N HCl The organic layer was dried (Na2SO4) filtered concentrated under vacuum The residue was purified by column chromatography on silica (100-200 mesh) eluting with 30% EtOAc in petroleum ether

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of (E)-2-bromo-4-(3-(3,5-dichloro-4-fluorophenyl)-4,4,4-trifluorobut-1-enyl)benzoic acid (300 mg, 0.638 mmol) in CH2Cl2 (5.0 mL) was added 2-amino-N-(2,2,2-trifluoroethyl)acetamide (172. mg, 0.638 mmol) followed by PyBOP (364.5 mg, 0.701 mmol) and DIPEA (0.32 mL, 1.914 mmol), and the resultant reaction mixture was stirred at ambient temperature for 18 h. The reaction mixture was diluted with water and extracted with CH2Cl2. The combined CH2Cl2 layer was washed with brine, dried over Na2SO4 and concentrated under reduced pressure. Purification by flash column chromatography (SiO2, 100-200 mesh; eluting with 40% EtOAc/petroleum ether) afforded the title compound as an off-white solid (121 mg, 31%): 1H NMR (400 MHz, CDCl3) δ 8.69 (t, J=6.0 Hz, 1H), 8.58 (t, J=6.0 Hz, 1H), 7.92 (s, 1H), 7.87 (d, J=6.4 Hz, 2H), 7.62 (d, J=8.4 Hz, 1H), 7.45 (d, J=8.4 Hz, 1H), 7.0 (m, 1H), 6.76 (d, J=15.6 Hz, 1H), 4.83 (t, J=8.0 Hz, 1H), 3.98 (m, 4H); ESIMS m/z 610.97 ([M+H]+); IR (thin film) 3303, 1658, 1166, 817 cm−1. the resultant reaction mixture extracted with CH2Cl2 The combined CH2Cl2 layer was washed with brine dried over Na2SO4 concentrated under reduced pressure Purification by flash column chromatography (SiO2, 100-200 mesh; eluting with 40% EtOAc/petroleum ether)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of (E)-4-(3-(3,5-dichloro-4-fluorophenyl)-4,4,4-trifluorobut-1-enyl)-2-(trifluoromethoxy)benzoic acid (0.25 g, 0.52 mmol), 2-amino-N-(2,2,2-trifluoroethyl)acetamide (0.158 g, 0.62 mmol), PyBOP (0.40 g, 0.78 mmol) and DIPEA (0.134 g, 1.04 mmol) in CH2Cl2 (10.0 mL) were stirred at ambient temperature for 16 h. The reaction mixture was diluted with water and extracted with CH2Cl2. The combined CH2Cl2 layer was washed with brine, dried over Na2SO4 and concentrated under reduced pressure. Purification by flash column chromatography (SiO2, 100-200 mesh; eluting with 20% EtOAc/pet ether) afforded the title compound as a pale yellow gummy material (0.15 g, 47%). extracted with CH2Cl2 The combined CH2Cl2 layer was washed with brine dried over Na2SO4 concentrated under reduced pressure Purification by flash column chromatography (SiO2, 100-200 mesh; eluting with 20% EtOAc/pet ether)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of (E)-4-(3-(3,5-dichloro-4-fluorophenyl)-4,4,4-trifluorobut-1-enyl)-2-(trifluoromethoxy)benzoic acid (0.25 g, 0.52 mmol), 2-amino-N-(2,2,2-trifluoroethyl)acetamide (0.158 g, 0.62 mmol), PyBOP (0.40 g, 0.78 mmol) and DIPEA (0.134 g, 1.04 mmol) in CH2Cl2 (10.0 mL) were stirred at ambient temperature for 16 h. The reaction mixture was diluted with water and extracted with CH2Cl2. The combined CH2Cl2 layer was washed with brine, dried over Na2SO4 and concentrated under reduced pressure. Purification by flash column chromatography (SiO2, 100-200 mesh; eluting with 20% EtOAc/pet ether) afforded the title compound as a pale yellow gummy material (0.15 g, 47%). extracted with CH2Cl2 The combined CH2Cl2 layer was washed with brine dried over Na2SO4 concentrated under reduced pressure Purification by flash column chromatography (SiO2, 100-200 mesh; eluting with 20% EtOAc/pet ether)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of (E)-2-bromo-4-(3-(3,5-dichloro-4-fluorophenyl)-4,4,4-trifluorobut-1-enyl)benzoic acid (300 mg, 0.638 mmol) in CH2Cl2 (5.0 mL) was added 2-amino-N-(2,2,2-trifluoroethyl)acetamide (172. mg, 0.638 mmol) followed by PyBOP (364.5 mg, 0.701 mmol) and DIPEA (0.32 mL, 1.914 mmol), and the resultant reaction mixture was stirred at ambient temperature for 18 h. The reaction mixture was diluted with water and extracted with CH2Cl2. The combined CH2Cl2 layer was washed with brine, dried over Na2SO4 and concentrated under reduced pressure. Purification by flash column chromatography (SiO2, 100-200 mesh; eluting with 40% EtOAc/petroleum ether) afforded the title compound as an off-white solid (121 mg, 31%): 1H NMR (400 MHz, CDCl3) δ 8.69 (t, J=6.0 Hz, 1H), 8.58 (t, J=6.0 Hz, 1H), 7.92 (s, 1H), 7.87 (d, J=6.4 Hz, 2H), 7.62 (d, J=8.4 Hz, 1H), 7.45 (d, J=8.4 Hz, 1H), 7.0 (m, 1H), 6.76 (d, J=15.6 Hz, 1H), 4.83 (t, J=8.0 Hz, 1H), 3.98 (m, 4H); ESIMS m/z 610.97 ([M+H]+); IR (thin film) 3303, 1658, 1166, 817 cm−1. the resultant reaction mixture extracted with CH2Cl2 The combined CH2Cl2 layer was washed with brine dried over Na2SO4 concentrated under reduced pressure Purification by flash column chromatography (SiO2, 100-200 mesh; eluting with 40% EtOAc/petroleum ether)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of (E)-2-bromo-4-(3-(3,5-dichloro-4-fluorophenyl)-4,4,4-trifluorobut-1-enyl)benzoic acid (300 mg, 0.638 mmol) in CH2Cl2 (5.0 mL) was added 2-amino-N-(2,2,2-trifluoroethyl)acetamide (172. mg, 0.638 mmol) followed by PyBOP (364.5 mg, 0.701 mmol) and DIPEA (0.32 mL, 1.914 mmol), and the resultant reaction mixture was stirred at ambient temperature for 18 h. The reaction mixture was diluted with water and extracted with CH2Cl2. The combined CH2Cl2 layer was washed with brine, dried over Na2SO4 and concentrated under reduced pressure. Purification by flash column chromatography (SiO2, 100-200 mesh; eluting with 40% EtOAc/petroleum ether) afforded the title compound as an off-white solid (121 mg, 31%): 1H NMR (400 MHz, CDCl3) δ 8.69 (t, J=6.0 Hz, 1H), 8.58 (t, J=6.0 Hz, 1H), 7.92 (s, 1H), 7.87 (d, J=6.4 Hz, 2H), 7.62 (d, J=8.4 Hz, 1H), 7.45 (d, J=8.4 Hz, 1H), 7.0 (m, 1H), 6.76 (d, J=15.6 Hz, 1H), 4.83 (t, J=8.0 Hz, 1H), 3.98 (m, 4H); ESIMS m/z 610.97 ([M+H]+); IR (thin film) 3303, 1658, 1166, 817 cm−1. the resultant reaction mixture extracted with CH2Cl2 The combined CH2Cl2 layer was washed with brine dried over Na2SO4 concentrated under reduced pressure Purification by flash column chromatography (SiO2, 100-200 mesh; eluting with 40% EtOAc/petroleum ether)