5-bromo-2-(2-methylpyrrolidin-1-yl)benzaldehyde

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

Procedure: To a solution of 5-bromo-2-(2-methylpyrrolidin-1-yl)benzaldehyde (17 g, 63.4 mmol) in methanol (150 mL) under nitrogen was added sodium borohydride (2.41 g, 63.4 mmol) at 0° C. in portions. The reaction mixture was stirred at RT for 1 hour, then evaporated to remove methanol. The resulting crude was taken up with water (250 mL) and extracted with EtOAc (150 mL). The organic layer was washed with water, then dried (Na2SO4) and concentrated under reduced pressure to afford the title compound as a yellow oil (16 g, 93%). 1H NMR (DMSO-d6, 400 MHz) δ 7.53 (1H, d), 7.27 (1H, d), 6.87 (1H, d), 5.22 (1H, t), 4.42 (2H, m), 3.56 (1H, m), 3.36 (1H, m), 2.70 (1H, m), 2.49 (1H, m) 2.09 (1H, m), 1.83 (1H, m), 1.73 (1H, m), 1.47 (1H, m), 0.90 (3H, d). evaporated to remove methanol extracted with EtOAc (150 mL) The organic layer was washed with water dried (Na2SO4) concentrated under reduced pressure

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

Procedure: To a solution of 5-bromo-2-(2-methylpyrrolidin-1-yl)benzaldehyde (17 g, 63.4 mmol) in methanol (150 mL) under nitrogen was added sodium borohydride (2.41 g, 63.4 mmol) at 0° C. in portions. The reaction mixture was stirred at RT for 1 hour, then evaporated to remove methanol. The resulting crude was taken up with water (250 mL) and extracted with EtOAc (150 mL). The organic layer was washed with water, then dried (Na2SO4) and concentrated under reduced pressure to afford the title compound as a yellow oil (16 g, 93%). 1H NMR (DMSO-d6, 400 MHz) δ 7.53 (1H, d), 7.27 (1H, d), 6.87 (1H, d), 5.22 (1H, t), 4.42 (2H, m), 3.56 (1H, m), 3.36 (1H, m), 2.70 (1H, m), 2.49 (1H, m) 2.09 (1H, m), 1.83 (1H, m), 1.73 (1H, m), 1.47 (1H, m), 0.90 (3H, d). evaporated to remove methanol extracted with EtOAc (150 mL) The organic layer was washed with water dried (Na2SO4) concentrated under reduced pressure

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

Procedure: To a solution of 5-bromo-2-(2-methylpyrrolidin-1-yl)benzaldehyde (17 g, 63.4 mmol) in methanol (150 mL) under nitrogen was added sodium borohydride (2.41 g, 63.4 mmol) at 0° C. in portions. The reaction mixture was stirred at RT for 1 hour, then evaporated to remove methanol. The resulting crude was taken up with water (250 mL) and extracted with EtOAc (150 mL). The organic layer was washed with water, then dried (Na2SO4) and concentrated under reduced pressure to afford the title compound as a yellow oil (16 g, 93%). 1H NMR (DMSO-d6, 400 MHz) δ 7.53 (1H, d), 7.27 (1H, d), 6.87 (1H, d), 5.22 (1H, t), 4.42 (2H, m), 3.56 (1H, m), 3.36 (1H, m), 2.70 (1H, m), 2.49 (1H, m) 2.09 (1H, m), 1.83 (1H, m), 1.73 (1H, m), 1.47 (1H, m), 0.90 (3H, d). evaporated to remove methanol extracted with EtOAc (150 mL) The organic layer was washed with water dried (Na2SO4) concentrated under reduced pressure

Conditions: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 5-bromo-2-fluorobenzaldehyde (15 g, 73.8 mmol) in DMSO (150 mL) and water (40 mL) were added 2-methylpyrrolidine (9.8 mL, 96 mmol) and sodium carbonate (15.7 g, 148 mmol). The resulting mixture was heated at 110° C. for 8 hours. The reaction mixture was cooled at RT, diluted with water (1000 mL) and extracted with MTBE (2×100 mL). The organic layers were combined, dried (Na2SO4) and concentrated under reduced pressure. After purification by flash chromatography (silica, pet ether/EtOAc), the title compound was obtained as a yellow oil (17 g, 85%). 1H NMR (DMSO-d6, 400 MHz) δ 9.94 (1H, s), 7.75 (1H, s), 7.51 (1H, d), 6.93 (1H, d), 3.92 (1H, m), 3.68 (1H, m), 2.97 (1H, t), 2.49-2.18 (1H, m), 1.88 (1H, m), 1.57-1.68 (2H, m), 1.10 (3H, d). The reaction mixture was cooled at RT extracted with MTBE (2×100 mL) dried (Na2SO4) concentrated under reduced pressure After purification by flash chromatography (silica, pet ether/EtOAc)

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

Procedure: To a solution of 5-bromo-2-(2-methylpyrrolidin-1-yl)benzaldehyde (17 g, 63.4 mmol) in methanol (150 mL) under nitrogen was added sodium borohydride (2.41 g, 63.4 mmol) at 0° C. in portions. The reaction mixture was stirred at RT for 1 hour, then evaporated to remove methanol. The resulting crude was taken up with water (250 mL) and extracted with EtOAc (150 mL). The organic layer was washed with water, then dried (Na2SO4) and concentrated under reduced pressure to afford the title compound as a yellow oil (16 g, 93%). 1H NMR (DMSO-d6, 400 MHz) δ 7.53 (1H, d), 7.27 (1H, d), 6.87 (1H, d), 5.22 (1H, t), 4.42 (2H, m), 3.56 (1H, m), 3.36 (1H, m), 2.70 (1H, m), 2.49 (1H, m) 2.09 (1H, m), 1.83 (1H, m), 1.73 (1H, m), 1.47 (1H, m), 0.90 (3H, d). evaporated to remove methanol extracted with EtOAc (150 mL) The organic layer was washed with water dried (Na2SO4) concentrated under reduced pressure

Conditions: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 5-bromo-2-fluorobenzaldehyde (15 g, 73.8 mmol) in DMSO (150 mL) and water (40 mL) were added 2-methylpyrrolidine (9.8 mL, 96 mmol) and sodium carbonate (15.7 g, 148 mmol). The resulting mixture was heated at 110° C. for 8 hours. The reaction mixture was cooled at RT, diluted with water (1000 mL) and extracted with MTBE (2×100 mL). The organic layers were combined, dried (Na2SO4) and concentrated under reduced pressure. After purification by flash chromatography (silica, pet ether/EtOAc), the title compound was obtained as a yellow oil (17 g, 85%). 1H NMR (DMSO-d6, 400 MHz) δ 9.94 (1H, s), 7.75 (1H, s), 7.51 (1H, d), 6.93 (1H, d), 3.92 (1H, m), 3.68 (1H, m), 2.97 (1H, t), 2.49-2.18 (1H, m), 1.88 (1H, m), 1.57-1.68 (2H, m), 1.10 (3H, d). The reaction mixture was cooled at RT extracted with MTBE (2×100 mL) dried (Na2SO4) concentrated under reduced pressure After purification by flash chromatography (silica, pet ether/EtOAc)