methyl 3-[(2,6-difluorophenyl)sulfonylamino]-2-fluorobenzoate

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

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

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

Conditions: temp:1.51; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Methyl 3-{[(2,6-difluorophenyl)sulfonyl]amino}-2-fluorobenzoate (490 g, 1 equiv.), prepared generally in accordance with Step A, above, was dissolved in THF (2.45 L, 5 vols) and stirred and cooled to 0-3° C. 1M lithium bis(trimethylsilyl)amide in THF (5.25 L, 3.7 equiv.) solution was charged to the reaction mixture followed addition of 2-chloro-4-methylpyrimidine (238 g, 1.3 equiv.) in THF (2.45 L, 5 vols). The reaction was then stirred for 1 hr. The reaction was quenched with 4.5M HCl (3.92 L, 8 vols). The aqueous layer (bottom layer) was removed and discarded. The organic layer was concentrated under reduced pressure to ˜2 L. IPAC (isopropyl acetate) (2.45 L) was added to the reaction mixture which was then concentrated to ˜2 L. IPAC (0.5 L) and MTBE (2.45 L) was added and stirred overnight under N2. The solids were filtered. The solids and mother filtrate added back together and stirred for several hours. The solids were filtered and washed with MTBE (˜5 vol). The solids were placed in vacuum oven at 50° C. overnight. The solids were dried in vacuum oven at 30° C. over weekend to obtain N-{3-[(2-chloro-4-pyrimidinyl)acetyl]-2-fluorophenyl}-2,6-difluorobenzenesulfonamide (479 g, 72%). The reaction was then stirred for 1 hr The reaction was quenched with 4.5M HCl (3.92 L, 8 vols) The aqueous layer (bottom layer) was removed The organic layer was concentrated under reduced pressure to ˜2 L IPAC (isopropyl acetate) (2.45 L) was added to the reaction mixture which was then concentrated to ˜2 L IPAC (0.5 L) and MTBE (2.45 L) was added stirred overnight under N2 The solids were filtered The solids and mother filtrate added back together stirred for several hours The solids were filtered washed with MTBE (˜5 vol) The solids were dried in vacuum oven at 30° C. over weekend

Conditions: temp:15.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Methyl 3-amino-2-fluorobenzoate (50 g, 1 eq) was charged to reactor followed by dichloromethane (250 mL, 5 vol). The contents were stirred and cooled to ˜15° C. and pyridine (26.2 mL, 1.1 eq) was added. After addition of the pyridine, the reactor contents were adjusted to ˜15° C. and the addition of 2,6-difluorobenzenesulfonyl chloride (39.7 mL, 1.0 eq) was started via addition funnel. The temperature during addition was kept <25° C. After complete addition, the reactor contents were warmed to 20-25° C. and held overnight. Ethyl acetate (150 mL) was added and dichloromethane was removed by distillation. Once distillation was complete, the reaction mixture was then diluted once more with ethyl acetate (5 vol) and concentrated. The reaction mixture was diluted with ethyl acetate (10 vol) and water (4 vol) and the contents heated to 50-55° C. with stirring until all solids dissolve. The layers were settled and separated. The organic layer was diluted with water (4 vol) and the contents heated to 50-55° for 20-30 min. The layers were settled and then separated and the ethyl acetate layer was evaporated under reduced pressure to ˜3 volumes. Ethyl Acetate (5 vol.) was added and again evaporated under reduced pressure to ˜3 volumes. Cyclohexane (9 vol) was then added to the reactor and the contents were heated to reflux for 30 min then cooled to 0° C. The solids were filtered and rinsed with cyclohexane (2×100 mL). The solids were air dried overnight to obtain methyl 3-{[(2,6-difluorophenyl)sulfonyl]amino}-2-fluorobenzoate (94.1 g, 91%). were adjusted to ˜15° C. was started via addition funnel The temperature during addition was kept <25° C After complete addition the reactor contents were warmed to 20-25° C. dichloromethane was removed by distillation Once distillation the reaction mixture was then diluted once more with ethyl acetate (5 vol) concentrated The reaction mixture was diluted with ethyl acetate (10 vol) and water (4 vol) the contents heated to 50-55° C. with stirring until all solids dissolve separated The organic layer was diluted with water (4 vol) the contents heated to 50-55° for 20-30 min separated the ethyl acetate layer was evaporated under reduced pressure to ˜3 volumes Ethyl Acetate (5 vol.) was added again evaporated under reduced pressure to ˜3 volumes Cyclohexane (9 vol) was then added to the reactor the contents were heated to reflux for 30 min then cooled to 0° C The solids were filtered rinsed with cyclohexane (2×100 mL) dried overnight

Conditions: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a 1000 mL flask was placed methyl 3-{[(2,6-difluorophenyl)sulfonyl]amino}-2-fluorobenzoate (9.64 g, 27.9 mmol) and THF (200 mL) was added. The flask was placed in an ice/water bath and LiHMDS (90 mL, 90 mmol) was added. 2-Chloro-4-methylpyrimidine (4.5 g, 35.0 mmol) in THF (60 mL) was added dropwise via addition funnel. After the addition was complete, the reaction was allowed to warm to 20° C. over 1 h. The THF volume was reduced to half under reduced pressure and then treated with 6 N HCl. EtOAc was added and the layers were separated. The aqueous layer was extracted twice with EtOAc and the combined organic layer was washed once with brine, dried over NaSO4, and concentrated. The residue was triturated with EtOAc/ether to afford 8.71 g (71%) of the title compound of Step D. MS (ESI): 442 [M+H]+. In a 1000 mL flask was placed The flask was placed in an ice/water bath After the addition the layers were separated The aqueous layer was extracted twice with EtOAc the combined organic layer was washed once with brine dried over NaSO4 concentrated The residue was triturated with EtOAc/ether

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

Procedure: In a 500 mL flask was placed methyl 3-amino-2-fluorobenzoate (5.5 g, 32.5 mmol) and DCM (100 mL), and pyridine (2.9 mL, 35.8 mmol) was added. 2,6-Difluorobenzenesulfonyl chloride (7.6 g, 35.8 mmol) in DCM (50 mL) was added dropwise via addition funnel and the reaction mixture was allowed to stir at rt overnight. The reaction mixture was stripped onto silica and column chromatographed on silica with 5% to 100% EtOAc:Hexane to give 9.75 g (87%) of the title compound of Step C. 1H-NMR (400 MHz, DMSO-d6) δ 10.98 (s, 1H), 7.64-7.82 (m, 3H), 7.46-7.61 (m, 1H), 7.29 (t, J=8.8 Hz, 2H), and 3.81 (s, 3H). MS (ESI): 346 [M+H]+. In a 500 mL flask was placed chromatographed on silica with 5% to 100% EtOAc

Conditions: temp:1.51; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Methyl 3-{[(2,6-difluorophenyl)sulfonyl]amino}-2-fluorobenzoate (490 g, 1 equiv.), prepared generally in accordance with Step A, above, was dissolved in THF (2.45 L, 5 vols) and stirred and cooled to 0-3° C. 1M lithium bis(trimethylsilyl)amide in THF (5.25 L, 3.7 equiv.) solution was charged to the reaction mixture followed addition of 2-chloro-4-methylpyrimidine (238 g, 1.3 equiv.) in THF (2.45 L, 5 vols). The reaction was then stirred for 1 hr. The reaction was quenched with 4.5M HCl (3.92 L, 8 vols). The aqueous layer (bottom layer) was removed and discarded. The organic layer was concentrated under reduced pressure to ˜2 L. IPAC (isopropyl acetate) (2.45 L) was added to the reaction mixture which was then concentrated to ˜2 L. IPAC (0.5 L) and MTBE (2.45 L) was added and stirred overnight under N2. The solids were filtered. The solids and mother filtrate added back together and stirred for several hours. The solids were filtered and washed with MTBE (˜5 vol). The solids were placed in vacuum oven at 50° C. overnight. The solids were dried in vacuum oven at 30° C. over weekend to obtain N-{3-[(2-chloro-4-pyrimidinyl)acetyl]-2-fluorophenyl}-2,6-difluorobenzenesulfonamide (479 g, 72%). The reaction was then stirred for 1 hr The reaction was quenched with 4.5M HCl (3.92 L, 8 vols) The aqueous layer (bottom layer) was removed The organic layer was concentrated under reduced pressure to ˜2 L IPAC (isopropyl acetate) (2.45 L) was added to the reaction mixture which was then concentrated to ˜2 L IPAC (0.5 L) and MTBE (2.45 L) was added stirred overnight under N2 The solids were filtered The solids and mother filtrate added back together stirred for several hours The solids were filtered washed with MTBE (˜5 vol) The solids were dried in vacuum oven at 30° C. over weekend

Conditions: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a 1000 mL flask was placed methyl 3-{[(2,6-difluorophenyl)sulfonyl]amino}-2-fluorobenzoate (9.64 g, 27.9 mmol) and THF (200 mL) was added. The flask was placed in an ice/water bath and LiHMDS (90 mL, 90 mmol) was added. 2-Chloro-4-methylpyrimidine (4.5 g, 35.0 mmol) in THF (60 mL) was added dropwise via addition funnel. After the addition was complete, the reaction was allowed to warm to 20° C. over 1 h. The THF volume was reduced to half under reduced pressure and then treated with 6N HCl. EtOAc was added and the layers were separated. The aqueous layer was extracted twice with EtOAc and the combined organic layer was washed once with brine, dried over NaSO4, and concentrated. The residue was triturated with EtOAc/ether to afford 8.71 g (71%) of the title compound of Step D. MS (ESI): 442 [M+H]+. In a 1000 mL flask was placed The flask was placed in an ice/water bath After the addition the layers were separated The aqueous layer was extracted twice with EtOAc the combined organic layer was washed once with brine dried over NaSO4 concentrated The residue was triturated with EtOAc/ether

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

Procedure: In a 500 mL flask was placed methyl 3-amino-2-fluorobenzoate (5.5 g, 32.5 mmol) and DCM (100 mL), and pyridine (2.9 mL, 35.8 mmol) was added. 2,6-Difluorobenzenesulfonyl chloride (7.6 g, 35.8 mmol) in DCM (50 mL) was added dropwise via addition funnel and the reaction mixture was allowed to stir at rt overnight. The reaction mixture was stripped onto silica and column chromatographed on silica with 5% to 100% EtOAc:Hexane to give 9.75 g (87%) of the title compound of Step C. 1H-NMR (400 MHz, DMSO-d6) δ 10.98 (s, 1H), 7.64-7.82 (m, 3H), 7.46-7.61 (m, 1H), 7.29 (t, J=8.8 Hz, 2H), and 3.81 (s, 3H). MS (ESI): 346 [M+H]+. In a 500 mL flask was placed chromatographed on silica with 5% to 100% EtOAc

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

Procedure: In a 500 mL flask was placed methyl 3-amino-2-fluorobenzoate (5.5 g, 32.5 mmol) and DCM (100 mL), and pyridine (2.9 mL, 35.8 mmol) was added. 2,6-Difluorobenzenesulfonyl chloride (7.6 g, 35.8 mmol) in DCM (50 mL) was added dropwise via addition funnel and the reaction mixture was allowed to stir at rt overnight. The reaction mixture was stripped onto silica and column chromatographed on silica with 5% to 100% EtOAc:Hexane to give 9.75 g (87%) of the title compound of Step C. 1H-NMR (400 MHz, DMSO-d6) δ 10.98 (s, 1H), 7.64-7.82 (m, 3H), 7.46-7.61 (m, 1H), 7.29 (t, J=8.8 Hz, 2H), and 3.81 (s, 3H). MS (ESI): 346 [M+H]+. In a 500 mL flask was placed chromatographed on silica with 5% to 100% EtOAc

Conditions: temp:1.51; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Methyl 3-{[(2,6-difluorophenyl)sulfonyl]amino}-2-fluorobenzoate (490 g, 1 equiv.), prepared generally in accordance with Step A, above, was dissolved in THF (2.45 L, 5 vols) and stirred and cooled to 0-3° C. 1M lithium bis(trimethylsilyl)amide in THF (5.25 L, 3.7 equiv.) solution was charged to the reaction mixture followed addition of 2-chloro-4-methylpyrimidine (238 g, 1.3 equiv.) in THF (2.45 L, 5 vols). The reaction was then stirred for 1 hr. The reaction was quenched with 4.5M HCl (3.92 L, 8 vols). The aqueous layer (bottom layer) was removed and discarded. The organic layer was concentrated under reduced pressure to ˜2 L. IPAC (isopropyl acetate) (2.45 L) was added to the reaction mixture which was then concentrated to ˜2 L. IPAC (0.5 L) and MTBE (2.45 L) was added and stirred overnight under N2. The solids were filtered. The solids and mother filtrate added back together and stirred for several hours. The solids were filtered and washed with MTBE (˜5 vol). The solids were placed in vacuum oven at 50° C. overnight. The solids were dried in vacuum oven at 30° C. over weekend to obtain N-{3-[(2-chloro-4-pyrimidinyl)acetyl]-2-fluorophenyl}-2,6-difluorobenzenesulfonamide (479 g, 72%). The reaction was then stirred for 1 hr The reaction was quenched with 4.5M HCl (3.92 L, 8 vols) The aqueous layer (bottom layer) was removed The organic layer was concentrated under reduced pressure to ˜2 L IPAC (isopropyl acetate) (2.45 L) was added to the reaction mixture which was then concentrated to ˜2 L IPAC (0.5 L) and MTBE (2.45 L) was added stirred overnight under N2 The solids were filtered The solids and mother filtrate added back together stirred for several hours The solids were filtered washed with MTBE (˜5 vol) The solids were dried in vacuum oven at 30° C. over weekend