Ammonium Acetate → (rac)-4-(3-Fluoro-4-trifluoromethyl-phenyl)-6,7-dihydro-5H-[2]pyrindin-7-ylamine

Participants

Reaction Steps

A solution of ammonium acetate (117 mg, 1.52 mmol) in MeOH (1 mL) was treated with 4-(3-fluoro-4-trifluoromethyl-phenyl)-5,6-dihydro-[2]pyrindin-7-one (intermediate A-14 [C1]) (15 mg, 0.051 mmol) dissolved in ethanol (0.5 mL) and the reaction mixture stirred at room temperature for 1 h. Sodium cyanoborohydride (11.2 mg, 0.18 mmol) was added and stirring continued at room temperature. After 15 min, the reaction mixture was heated to reflux for 30 min. The solvent was removed under reduced pressure, a sat. aq. solution of ammonium chloride (2 mL) and a 1 M solution of HCl (1 mL) were added and the aq. phase washed with dichloromethane (3×5 mL). To the aq. phase was added a 1 M solution of NaOH (2 mL) and extracted with dichloromethane (3×5 mL). The combined organic phases were dried over MgSO4 and concentrated under reduced pressure. The title compound was isolated as light brown solid (3.8 mg, 25%). MS: 297.4 (M+H)+.

Provenance & Evidence