1-(bromomethyl)-4-(difluoromethyl)benzene

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

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

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

Procedure: 4-Chloro-N-(2-oxo-azepan-3-yl)-benzenesulfonamide (0.45 g, 1.50 mmol), 1-bromomethyl-4-difluoromethyl-benzene (0.66 g, 3.00 mmol), potassium carbonate (2.09 g, 15.0 mmol) and potassium iodide (0.05 g, 0.20 mmol) in 15 ml dimethylformamide were stirred at 65° C. for 5 hours. Extraction with water/ethylacetate and chromatography on silicagel with ethylacetate/heptane (90/10 to 1/0) yielded 0.63 g (94%) 4-chloro-N-(4-difluoromethyl-benzyl)-N-(2-oxo-azepan-3-yl)-benzenesulfonamide as white solid, MS: m/e (%)=443.0 (MH+, 100). Extraction with water/ethylacetate and chromatography on silicagel with ethylacetate/heptane (90/10 to 1/0)

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

Procedure: 4-Chloro-N-(2-oxo-azepan-3-yl)-benzenesulfonamide (0.45 g, 1.50 mmol), 1-bromomethyl-4-difluoromethyl-benzene (0.66 g, 3.00 mmol), potassium carbonate (2.09 g, 15.0 mmol) and potassium iodide (0.05 g, 0.20 mmol) in 15 ml dimethylformamide were stirred at 65° C. for 5 hours. Extraction with water/ethylacetate and chromatography on silicagel with ethylacetate/heptane (90/10 to 1/0) yielded 0.63 g (94%) 4-chloro-N-(4-difluoromethyl-benzyl)-N-(2-oxo-azepan-3-yl)-benzenesulfonamide as white solid, MS: m/e (%)=443.0 (MH+, 100). Extraction with water/ethylacetate and chromatography on silicagel with ethylacetate/heptane (90/10 to 1/0)

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

Procedure: A 60% dispersion of sodium hydride in mineral oil (232 mg, 5.31 mmol) was added to a stirred solution of (S)-3-((tert-butyldimethylsilyl)oxy)pyrrolidin-2-one (762 mg, 3.54 mmol, intermediate G) in THF (7 mL) at 0° C. After 15 min, a solution of 1-(bromomethyl)-4-(difluoromethyl)benzene (980 mg, 4.43 mmol) in THF (7 mL) was added to the reaction mixture. The resulting mixture was stirred at room temperature for 6 h. The reaction was carefully quenched with several grams of ice pellets. The resulting mixture was extracted with EtOAc. The combined organic layers were washed with water, dried over sodium sulfate, filtered and concentrated in vacuo. The crude reaction mixture was purified using silica gel column chromatography (0-30% EtOAc/hexanes) to afford the desired product (440 mg, 35% yield) as a white solid: LCMS (M+H)+ 356.3; 1H NMR (500 MHz, chloroform-d) δ 7.49 (d, J=8.1 Hz, 2H), 7.35 (d, J=7.9 Hz, 2H), 6.65 (br. t, J=1.0 Hz, 1H), 4.56-4.44 (m, 2H), 4.38 (t, J=7.5 Hz, 1H), 3.27 (ddd, J=9.7, 8.7, 3.4 Hz, 1H), 3.13 (dt, J=9.7, 7.4 Hz, 1H), 2.36-2.27 (m, 1H), 1.98-1.90 (m, 1H), 0.96 (br. s., 9H), 0.22-0.20 (m, 3H), 0.20-0.18 (m, 3H). The reaction was carefully quenched with several grams of ice pellets The resulting mixture was extracted with EtOAc The combined organic layers were washed with water dried over sodium sulfate filtered concentrated in vacuo The crude reaction mixture was purified

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

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

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

Procedure: 4-Chloro-N-((R)-5,5-difluoro-2-oxo-azepan-3-yl)-benzenesulfonamide was alkylated using 1-bromomethyl-4-difluoromethyl-benzene analogous to Example 1 to afford 4-chloro-N-(4-difluoromethyl-benzyl)-N-((R)-5,5-difluoro-2-oxo-azepan-3-yl)-benzenesulfonamide:

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

Procedure: A 60% dispersion of sodium hydride in mineral oil (232 mg, 5.31 mmol) was added to a stirred solution of (S)-3-((tert-butyldimethylsilyl)oxy)pyrrolidin-2-one (762 mg, 3.54 mmol) in THF (7 mL) at 0° C. After 15 min, a solution of 1-(bromomethyl)-4-(difluoromethyl)benzene (980 mg, 4.43 mmol) in THF (7 mL) was added to the reaction mixture. The resulting mixture was stirred at RT for 6 h. The reaction was quenched with pellets of ice. The resulting mixture was extracted with EtOAc. The combined organic layers were washed with water, dried over sodium sulfate, filtered and concentrated in vacuo. The crude reaction mixture was purified using silica gel column chromatography (0-30% EtOAc/hexanes) to afford (S)-3-((tert-butyldimethylsilyl)oxy)-1-(4-(difluoromethyl)benzyl)pyrrolidin-2-one (440 mg, 35% yield) as a white solid: LCMS (M+H)+356.3; 1H NMR (500 MHz, chloroform-d) δ 7.49 (d, J=8.1 Hz, 2H), 7.35 (d, J=7.9 Hz, 2H), 6.65 (br. t, J=1.0 Hz, 1H), 4.56-4.44 (m, 2H), 4.38 (t, J=7.5 Hz, 1H), 3.27 (ddd, J=9.7, 8.7, 3.4 Hz, 1H), 3.13 (dt, J=9.7, 7.4 Hz, 1H), 2.36-2.27 (m, 1H), 1.98-1.90 (m, 1H), 0.96 (br. s., 9H), 0.22-0.20 (m, 3H), 0.20-0.18 (m, 3H). The reaction was quenched with pellets of ice The resulting mixture was extracted with EtOAc The combined organic layers were washed with water dried over sodium sulfate filtered concentrated in vacuo The crude reaction mixture was purified

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

Procedure: 4-Chloro-N-(2-oxo-azepan-3-yl)-benzenesulfonamide (0.45 g, 1.50 mmol), 1-bromomethyl-4-difluoromethyl-benzene (0.66 g, 3.00 mmol), potassium carbonate (2.09 g, 15.0 mmol) and potassium iodide (0.05 g, 0.20 mmol) in 15 ml dimethylformamide were stirred at 65° C. for 5 hours. Extraction with water/ethylacetate and chromatography on silicagel with ethylacetate/heptane (90/10 to 1/0) yielded 0.63 g (94%) 4-chloro-N-(4-difluoromethyl-benzyl)-N-(2-oxo-azepan-3-yl)-benzenesulfonamide as white solid, MS: m/e (%)=443.0 (MH+, 100). Extraction with water/ethylacetate and chromatography on silicagel with ethylacetate/heptane (90/10 to 1/0)

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

Procedure: A 60% dispersion of sodium hydride in mineral oil (232 mg, 5.31 mmol) was added to a stirred solution of (S)-3-((tert-butyldimethylsilyl)oxy)pyrrolidin-2-one (762 mg, 3.54 mmol, intermediate G) in THF (7 mL) at 0° C. After 15 min, a solution of 1-(bromomethyl)-4-(difluoromethyl)benzene (980 mg, 4.43 mmol) in THF (7 mL) was added to the reaction mixture. The resulting mixture was stirred at room temperature for 6 h. The reaction was carefully quenched with several grams of ice pellets. The resulting mixture was extracted with EtOAc. The combined organic layers were washed with water, dried over sodium sulfate, filtered and concentrated in vacuo. The crude reaction mixture was purified using silica gel column chromatography (0-30% EtOAc/hexanes) to afford the desired product (440 mg, 35% yield) as a white solid: LCMS (M+H)+ 356.3; 1H NMR (500 MHz, chloroform-d) δ 7.49 (d, J=8.1 Hz, 2H), 7.35 (d, J=7.9 Hz, 2H), 6.65 (br. t, J=1.0 Hz, 1H), 4.56-4.44 (m, 2H), 4.38 (t, J=7.5 Hz, 1H), 3.27 (ddd, J=9.7, 8.7, 3.4 Hz, 1H), 3.13 (dt, J=9.7, 7.4 Hz, 1H), 2.36-2.27 (m, 1H), 1.98-1.90 (m, 1H), 0.96 (br. s., 9H), 0.22-0.20 (m, 3H), 0.20-0.18 (m, 3H). The reaction was carefully quenched with several grams of ice pellets The resulting mixture was extracted with EtOAc The combined organic layers were washed with water dried over sodium sulfate filtered concentrated in vacuo The crude reaction mixture was purified