2,2-dimethylpropanethioamide

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

Procedure: Following a procedure analogous to the procedure described in Intermediate 6 using 2-propen-1-yl {3-[(2-chloro-4-pyrimidinyl)acetyl]-2,4-difluorophenyl}carbamate (10 g, 27.2 mmol) NBS (5.08 g, 28.6 mmol) and 2,2-dimethylpropanethioamide (3.51 g, 29.9 mmol) the title compound of Step A was obtained (2.15 g, 17% yield). 1H NMR (400 MHz, DMSO-d6) δ ppm 9.55 (br. s., 1H), 8.67 (d, J=5.3 Hz, 1H), 7.83 (d, J=6.0 Hz, 1H), 7.27 (t, J=8.9 Hz, 1H), 7.16 (d, J=5.3 Hz, 1H), 5.89-6.01 (m, 1H), 5.34 (d, J=17.2 Hz, 1H), 5.22 (d, J=10.4 Hz, 1H), 4.60 (d, J=5.3 Hz, 2H), 1.45 (s, 9H); MS (ESI): 464 [M+H]+.

Conditions: temp:10.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a reactor vessel was charged N-{3-[(2-chloro-4-pyrimidinyl)acetyl]-2-fluorophenyl}-2,6-difluorobenzenesulfonamide (30 g, 1 eq) followed by dichloromethane (300 mL). The reaction slurry was cooled to ˜10° C. and N-bromosuccinimide (“NBS”) (12.09 g, 1 eq) was added in 3 approximately equal portions, stirring for 10-15 minutes between each addition. After the final addition of NBS, the reaction mixture was warmed to ˜20° C. and stirred for 45 min. Water (5 vol) was then added to the reaction vessel and the mixture was stirred and then the layers separated. Water (5 vol) was again added to the dichloromethane layer and the mixture was stirred and the layers separated. The dichloromethane layers were concentrated to ˜120 mL. Ethyl acetate (7 vol) was added to the reaction mixture and concentrated to ˜120 mL. Dimethylacetamide (270 mL) was then added to the reaction mixture and cooled to ˜10° C. 2,2-Dimethylpropanethioamide (1.3 g, 0.5 eq) in 2 equal portions was added to the reactor contents with stirring for ˜5 minutes between additions. The reaction was warmed to 20-25° C. After 45 min, the vessel contents were heated to 75° C. and held for 1.75 hours. The reaction mixture was then cooled to 5° C. and water (270 ml) was slowly charged keeping the temperature below 30° C. Ethyl acetate (4 vol) was then charged and the mixture was stirred and layers separated. Ethyl acetate (7 vol) was again charged to the aqueous layer and the contents were stirred and separated. Ethyl acetate (7 vol) was charged again to the aqueous layer and the contents were stirred and separated. The organic layers were combined and washed with water (4 vol) 4 times and stirred overnight at 20-25° C. The organic layers were then concentrated under heat and vacuum to 120 mL. The vessel contents were then heated to 50° C. and heptanes (120 mL) were added slowly. After addition of heptanes, the vessel contents were heated to reflux then cooled to 0° C. and held for ˜2 hrs. The solids were filtered and rinsed with heptanes (2×2 vol). The solid product was then dried under vacuum at 30° C. to obtain N-{3-[5-(2-chloro-4-pyrimidinyl)-2-(1,1-dimethylethyl)-1,3-thiazol-4-yl]-2-fluorophenyl}-2,6-difluorobenzenesulfonamide (28.8 g, 80%). the reaction mixture was warmed to ˜20° C. stirred for 45 min the mixture was stirred the layers separated Water (5 vol) was again added to the dichloromethane layer the mixture was stirred the layers separated The dichloromethane layers were concentrated to ˜120 mL Ethyl acetate (7 vol) was added to the reaction mixture concentrated to ˜120 mL Dimethylacetamide (270 mL) was then added to the reaction mixture cooled to ˜10° C with stirring for ˜5 minutes between additions The reaction was warmed to 20-25° C After 45 min the vessel contents were heated to 75° C. held for 1.75 hours The reaction mixture was then cooled to 5° C. the temperature below 30° C the mixture was stirred layers separated Ethyl acetate (7 vol) was again charged to the aqueous layer the contents were stirred separated Ethyl acetate (7 vol) was charged again to the aqueous layer the contents were stirred separated washed with water (4 vol) 4 times stirred overnight at 20-25° C The organic layers were then concentrated under heat The vessel contents were then heated to 50° C. heptanes (120 mL) were added slowly After addition of heptanes the vessel contents were heated to reflux then cooled to 0° C. held for ˜2 hrs The solids were filtered rinsed with heptanes (2×2 vol) The solid product was then dried under vacuum at 30° C.

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

Procedure: To a solution of N-{2-chloro-3-[(E)-2-(2-chloro-4-pyrimidinyl)-1-hydroxyethenyl]phenyl}-2,5-difluorobenzenesulfonamide (3.0 g, 6.55 mmol) in DMA (25 mL) was added NBS (1.165 g, 6.55 mmol). After stirring for 1 h at rt, 2,2-dimethylpropanethioamide (0.767 g, 6.55 mmol) was added and the reaction mixture was stirred at 80° C. for 2 h. The reaction mixture was diluted with EtOAc (100 mL) and extracted five times with water. The organic layer was dried over anhydrous NaSO4, adsorbed onto silica gel, and purified via column chromatography, eluting with 0-50% EtOAc/DCM. The desired fractions were combined and concentrated to generate 1.31 g (2.36 mmol, 36.0% yield) of the title compound as a yellow powder. 1H NMR (400 MHz, DMSO-d6): δ 10.74 (s, 1H), 8.56 (d, J=5.4 Hz, 1H), 7.41-7.58 (m, 6H), 6.57 (d, J=5.4 Hz, 1H), 1.42 (s, 9H). MS (ESI): 555.0 [M+H]+. the reaction mixture was stirred at 80° C. for 2 h extracted five times with water The organic layer was dried over anhydrous NaSO4 purified via column chromatography eluting with 0-50% EtOAc/DCM concentrated

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

Procedure: Following a procedure analogous to the procedure described in Example 18, Step A using N-{2-chloro-3-[(E)-2-(2-chloro-4-pyrimidinyl)-1-hydroxyethenyl]phenyl}-2,6-difluorobenzenesulfonamide (4.03 g, 8.80 mmol) and 2,2-dimethylpropanethioamide (1.03 g, 8.80 mmol), the title compound was obtained as a bright yellow solid (2.25 g;

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

Procedure: To a solution of 2-propen-1-yl {5-[(2-chloro-4-pyrimidinyl)acetyl]-2-fluorophenyl}carbamate (35 g, 100.3 mmol in DMA, 500 mL), NBS (17.8 g, 100.3 mmol) was added. The reaction mixture was stirred at rt for 1 h. Then 2,2-dimethylpropanethioamide (13 g, 111 mmol) was added at 0° C. The mixture was stirred at 80° C. for 2 h. The mixture was poured into water and extracted with EtOAc (1 L×3). The combined organic layers were washed with water and brine successively, dried over Na2SO4, filtered and concentrated under reduced pressure to give the crude product, which was purified by column chromatography on silica gel (DCM:petroleum ether 2:1) to afford the title compound (36 g, 80.5% yield). 1H NMR (400 MHz, CDCl3) δ ppm 8.24-8.31 (m, 2H), 7.09-7.18 (m, 2H), 7.01 (d, J=5.5 Hz, 1H), 6.92-6.98 (br, 1H), 5.87-5.97 (m, 1H), 5.31-5.37 (m, 1H), 5.24-5.28 (m, 1H), 4.61-4.65 (m, 2H), 1.46 (s, 9H). The mixture was stirred at 80° C. for 2 h extracted with EtOAc (1 L×3) The combined organic layers were washed with water and brine successively dried over Na2SO4 filtered concentrated under reduced pressure to give the crude product, which was purified by column chromatography on silica gel (DCM:petroleum ether 2:1)

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

Procedure: To a solution of 2-propen-1-yl {3-[(2-chloro-4-pyrimidinyl)acetyl]-2-fluorophenyl}carbamate (30 g, 85.9 mmol) (Intermediate 20) in DMA (300 mL), NBS (15.3 g, 85.9 mmol) was added. The reaction mixture was stirred at rt for 1 h. Then 2,2-dimethylpropanethioamide (11.0 g, 94.5 mmol) was added at 0° C. The mixture was stirred at rt for 2 h. The mixture was poured into water and extracted with EtOAc (200 mL×3). The combined organic layers were washed with water and brine successively, dried over Na2SO4, filtered and concentrated under reduced pressure to give the crude product, which was purified by column chromatography on silica gel (DCM:petroleum ether 2:1) to afford the title compound. (11 g, 35.4% yield). 1H NMR (400 MHz, CDCl3) δ ppm 8.29 (d, J=5.27 Hz, 1H), 8.12-8.19 (m, 1H), 7.12-7.25 (m, 2H), 6.80-6.88 (m, 2H), 5.85-5.98 (m, 1H), 5.20-5.37 (m, 2H), 4.61-4.67 (m, 2H). MS (ES+): 447 [M+H]+. The mixture was stirred at rt for 2 h extracted with EtOAc (200 mL×3) The combined organic layers were washed with water and brine successively dried over Na2SO4 filtered concentrated under reduced pressure to give the crude product, which was purified by column chromatography on silica gel (DCM:petroleum ether 2:1)

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

Procedure: To a solution of N-{3-[(2-chloro-4-pyrimidinyl)acetyl]-2-fluorophenyl}-2,6-difluorobenzenesulfonamide (2.0 g, 4.53 mmol) in 40 mL DMA, 1.0 eq. NBS (0.806 g, 4.53 mmol) was added and the solution was allowed to stir 15 min at rt. 2,2-dimethylpropanethioamide (0.531 g, 4.53 mmol) was then added at rt. The reaction was heated to 60° C. for 2 hours. The reaction was not complete by LC-MS. The reaction mixture was then heated to 80° C. for an additional hour. The reaction mixture was diluted with water and extracted×2 with EtOAc. The combined EtOAc washings were washed with water×3 to remove DMA, dried over MgSO4, filtered and concentrated onto silica gel. The crude material was chromatographed in 10-80% EtOAc in Hexanes to give the desired product, 1.6 g (64%). MS (ESI): 539.1 [M+H]+. The reaction was heated to 60° C. for 2 hours The reaction mixture was then heated to 80° C. for an additional hour extracted×2 with EtOAc The combined EtOAc washings were washed with water×3 to remove DMA dried over MgSO4 filtered concentrated onto silica gel The crude material was chromatographed in 10-80% EtOAc in Hexanes

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

Procedure: To a solution of N-{3-[(Z)-2-(2-chloro-4-pyrimidinyl)-1-hydroxyethenyl]phenyl}-2,5-difluorobenzenesulfonamide (1.0 g, 2.4 mmol) in 25 mL DMA, NBS (0.420 g, 2.4 mmol) was added and the solution was allowed to stir 15 minutes at rt. 2,2-Dimethylpropanethioamide (0.277 g, 2.359 mmol) was then added and the reaction mixture was heated at 80° C. for 2 h. The reaction mixture was diluted with EtOAc and washed with water×3. The organic layer was dried over MgSO4 and filtered. The organic solution was evaporated onto silica gel and chromatographed. 0-50% EtOAc in DCM to give the title compound (1.01 g, 81% yield). ES-LCMS m/z 521.1 (M+H). the reaction mixture was heated at 80° C. for 2 h washed with water×3 The organic layer was dried over MgSO4 filtered The organic solution was evaporated onto silica gel chromatographed

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

Procedure: Following a procedure analogous to the procedure described in Intermediate 6, using N-{3-[(Z)-2-(2-chloro-4-pyrimidinyl)-1-hydroxyethenyl]phenyl}-2,6-difluorobenzenesulfonamide (1.00 g, 2.36 mmol) and 2,2-dimethylpropanethioamide (0.277 g, 2.36 mmol) the title compound was obtained (690 mg, 53.3% yield). MS (ESI): 521.1 [M+H]+.

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

Procedure: A solution of 2,2-dimethyl-thiopropionamide (7.7 g, 65.8 mmol) and ethyl 2-chloroacetate (9.26 mL, 67 mmol) in 150 mL of ethanol was heated at reflux temperature for 24 h. The reaction mixture was concentrated under reduced pressure, suspended in ethyl acetate, and washed with saturated aqueous sodium bicarbonate and brine solutions. The organic fraction was dried over anhydrous magnesium sulfate and concentrated to 14.1 g of an orange viscous material. MS (ESI+): 229.4 (M+1). at reflux temperature for 24 h The reaction mixture was concentrated under reduced pressure washed with saturated aqueous sodium bicarbonate and brine solutions The organic fraction was dried over anhydrous magnesium sulfate concentrated to 14.1 g of an orange viscous material

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

Procedure: A solution of 2,2-dimethyl-thiopropionamide (7.7 g, 65.8 mmol) and ethyl 2-chloroacetate (9.26 mL, 67 mmol) in 150 mL of ethanol was heated at reflux temperature for 24 h. The reaction mixture was concentrated under reduced pressure, suspended in ethyl acetate, and washed with saturated aqueous sodium bicarbonate and brine solutions. The organic fraction was dried over anhydrous magnesium sulfate and concentrated to 14.1 g of an orange viscous material. MS (ESI+): 229.4 (M+1). at reflux temperature for 24 h The reaction mixture was concentrated under reduced pressure washed with saturated aqueous sodium bicarbonate and brine solutions The organic fraction was dried over anhydrous magnesium sulfate concentrated to 14.1 g of an orange viscous material

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

Procedure: Following a procedure analogous to the procedure described in Intermediate 6 using 2-propen-1-yl {3-[(2-chloro-4-pyrimidinyl)acetyl]-2,4-difluorophenyl}carbamate (10 g, 27.2 mmol) NBS (5.08 g, 28.6 mmol) and 2,2-dimethylpropanethioamide (3.51 g, 29.9 mmol) the title compound of Step A was obtained (2.15 g, 17% yield). 1H NMR (400 MHz, DMSO-d6) δ ppm 9.55 (br. s., 1H), 8.67 (d, J=5.3 Hz, 1H), 7.83 (d, J=6.0 Hz, 1H), 7.27 (t, J=8.9 Hz, 1H), 7.16 (d, J=5.3 Hz, 1H), 5.89-6.01 (m, 1H), 5.34 (d, J=17.2 Hz, 1H), 5.22 (d, J=10.4 Hz, 1H), 4.60 (d, J=5.3 Hz, 2H), 1.45 (s, 9H); MS (ESI): 464 [M+H]+.