2-chloro-N-(2,4-difluorophenyl)acetamide

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:130.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a suspension of 6-(4-(2-fluorophenyl)piperazine-1-carbonyl)-5-methylthieno[2,3-d]pyrimidin-4(3H)-one, (0.06 g, 0.16 mmol) in CH3CN (0.5 mL) was added K2CO3 (22 mg, 0.16 mmol), KI (29 mg, 0.17 mmol), and 2-chloro-N-(2,4-difluorophenyl)acetamide, (36 mg, 0.16 mmol). The reaction mixture was heated at 130° C. for 25 min in a microwave reactor. The reaction was quenched with H2O (25 mL) and the aqueous layer was extracted with EtOAc (25 mL). The organic layer was washed with brine (25 mL), dried over Na2SO4 and concentrated. The crude material was purified by flash chromatography (Et2O:DCM, 1:1) providing 30 mg of pure N-(2,4-difluorophenyl)-2-(6-(4-(2-fluorophenyl)piperazine-1-carbonyl)-5-methyl-4-oxothieno[2,3-d]pyrimidin-3(4H)-yl)acetamide, (yield: 35%). The reaction was quenched with H2O (25 mL) the aqueous layer was extracted with EtOAc (25 mL) The organic layer was washed with brine (25 mL) dried over Na2SO4 concentrated The crude material was purified by flash chromatography (Et2O:DCM, 1:1)

Conditions: temp:130.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a suspension of 6-(4-(2-fluorophenyl)piperazine-1-carbonyl)-5-methylthieno[2,3-d]pyrimidin-4(3H)-one, (0.06 g, 0.16 mmol) in CH3CN (0.5 mL) was added K2CO3 (22 mg, 0.16 mmol), KI (29 mg, 0.17 mmol), and 2-chloro-N-(2,4-difluorophenyl)acetamide, (36 mg, 0.16 mmol). The reaction mixture was heated at 130° C. for 25 min in a microwave reactor. The reaction was quenched with H2O (25 mL) and the aqueous layer was extracted with EtOAc (25 mL). The organic layer was washed with brine (25 mL), dried over Na2SO4 and concentrated. The crude material was purified by flash chromatography (Et2O:DCM, 1:1) providing 30 mg of pure N-(2,4-difluorophenyl)-2-(6-(4-(2-fluorophenyl)piperazine-1-carbonyl)-5-methyl-4-oxothieno[2,3-d]pyrimidin-3(4H)-yl)acetamide, (yield: 35%). The reaction was quenched with H2O (25 mL) the aqueous layer was extracted with EtOAc (25 mL) The organic layer was washed with brine (25 mL) dried over Na2SO4 concentrated The crude material was purified by flash chromatography (Et2O:DCM, 1:1)

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

Procedure: To a cooled (0° C.) solution of 2,4-difluoroaniline, (1.5 g, 11.6 mmol) in DCM (50 mL) was added triethylamine (1.9 mL, 13.9 mmol) followed by 2-chloroacetyl chloride (1.0 mL, 12.8 mmol). The reaction was warmed to RT and stirred for 2 h. The reaction mixture was concentrated, redissolved in EtOAc (50 mL) and washed with brine (50 mL). The organic layer was dried over anhydrous Na2SO4 and concentrated to yield 2.2 g of crude product which was further purified by flash column chromatography using 1:1 EtOAc:hexanes as the eluent. 2.0 g of 2-chloro-N-(2,4-difluorophenyl)acetamide, (yield: 84%) was isolated. The reaction mixture was concentrated redissolved in EtOAc (50 mL) washed with brine (50 mL) The organic layer was dried over anhydrous Na2SO4 concentrated to yield 2.2 g of crude product which was further purified by flash column chromatography

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

Procedure: A mixture of 1-pyridin-2-ylpiperazine (24 mg, 0.15 mmol, Aldrich), N-(2,4-difluorophenyl)-2-chloroacetamide (41 mg, 0.20 mmol, Maybridge) and sodium carbonate (50 mg) in N,N-dimethylformamide/water (2:1, 2 mL) was shaken at room temperature for 18 hours. The resulting mixture was decanted, concentrated under reduced pressure and the residue purified by preparative HPLC to provide 37.3 mg (74.8%) of the desired product. 1H NMR (500 MHz, DMSO-d6) δ 2.52 (t, J=4 Hz, 4H), 3.23 (s, 2H), 3.58 (t, J=4 Hz, 4H), 6.63 (t, J=5 Hz, 1H), 6.83 (d, J=6 Hz, 1H), 7.08 (t, J=6 Hz, 1H), 7.38 (t, J=6 Hz, 1H), 7.92 (m, 1H), 8.12 (d, J=5 Hz, 1H), 9.60 (s, 1H); MS (ESI/APCI+) m/e 333 (M+H)+. The resulting mixture was decanted concentrated under reduced pressure the residue purified by preparative HPLC

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:130.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a suspension of 6-(4-(2-fluorophenyl)piperazine-1-carbonyl)-5-methylthieno[2,3-d]pyrimidin-4(3H)-one, (0.06 g, 0.16 mmol) in CH3CN (0.5 mL) was added K2CO3 (22 mg, 0.16 mmol), KI (29 mg, 0.17 mmol), and 2-chloro-N-(2,4-difluorophenyl)acetamide, (36 mg, 0.16 mmol). The reaction mixture was heated at 130° C. for 25 min in a microwave reactor. The reaction was quenched with H2O (25 mL) and the aqueous layer was extracted with EtOAc (25 mL). The organic layer was washed with brine (25 mL), dried over Na2SO4 and concentrated. The crude material was purified by flash chromatography (Et2O:DCM, 1:1) providing 30 mg of pure N-(2,4-difluorophenyl)-2-(6-(4-(2-fluorophenyl)piperazine-1-carbonyl)-5-methyl-4-oxothieno[2,3-d]pyrimidin-3(4H)-yl)acetamide, (yield: 35%). The reaction was quenched with H2O (25 mL) the aqueous layer was extracted with EtOAc (25 mL) The organic layer was washed with brine (25 mL) dried over Na2SO4 concentrated The crude material was purified by flash chromatography (Et2O:DCM, 1:1)

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

Procedure: To a cooled (0° C.) solution of 2,4-difluoroaniline, (1.5 g, 11.6 mmol) in DCM (50 mL) was added triethylamine (1.9 mL, 13.9 mmol) followed by 2-chloroacetyl chloride (1.0 mL, 12.8 mmol). The reaction was warmed to RT and stirred for 2 h. The reaction mixture was concentrated, redissolved in EtOAc (50 mL) and washed with brine (50 mL). The organic layer was dried over anhydrous Na2SO4 and concentrated to yield 2.2 g of crude product which was further purified by flash column chromatography using 1:1 EtOAc:hexanes as the eluent. 2.0 g of 2-chloro-N-(2,4-difluorophenyl)acetamide, (yield: 84%) was isolated. The reaction mixture was concentrated redissolved in EtOAc (50 mL) washed with brine (50 mL) The organic layer was dried over anhydrous Na2SO4 concentrated to yield 2.2 g of crude product which was further purified by flash column chromatography

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

Procedure: A mixture of 1-pyridin-2-ylpiperazine (24 mg, 0.15 mmol, Aldrich), N-(2,4-difluorophenyl)-2-chloroacetamide (41 mg, 0.20 mmol, Maybridge) and sodium carbonate (50 mg) in N,N-dimethylformamide/water (2:1, 2 mL) was shaken at room temperature for 18 hours. The resulting mixture was decanted, concentrated under reduced pressure and the residue purified by preparative HPLC to provide 37.3 mg (74.8%) of the desired product. 1H NMR (500 MHz, DMSO-d6) δ 2.52 (t, J=4 Hz, 4H), 3.23 (s, 2H), 3.58 (t, J=4 Hz, 4H), 6.63 (t, J=5 Hz, 1H), 6.83 (d, J=6 Hz, 1H), 7.08 (t, J=6 Hz, 1H), 7.38 (t, J=6 Hz, 1H), 7.92 (m, 1H), 8.12 (d, J=5 Hz, 1H), 9.60 (s, 1H); MS (ESI/APCI+) m/e 333 (M+H)+. The resulting mixture was decanted concentrated under reduced pressure the residue purified by preparative HPLC