反应详情

Following the procedure described for Preparation 8, Step B, 5-[4-(4-fluoro-phenyl)-3-oxo-butyl ]-pyrrolidin-2-one (2.64 g, mmol) was reduced with NaBH4 (400 mg, mmol) at room temperature for 1 h. Additional NaBH4 (150 mg) was added and the reaction was stirred for 20 h. Purification by medium pressure chromatography using a solvent gradient (CH2Cl2 to 2% MeOH in CH2Cl2 to 4% MeOH in CH2Cl2) provided 5-[4-(4-fluoro-phenyl)-3-hydroxy-butyl]-pyrrolidin-2-one (2.01 g). 1H NMR (CDCl3) δ7.14 (m, 2H), 6.98 (m, 2H), 6.78 (m, 1H), 3.76 (m, 1H), 3.65 (m, 1H), 2.76 (m, 1H), 2.64 (m, 1H), 2.32-2.18 (m, 4H), 1.72-1.47 (m, 5H).

1. customPurification by medium pressure chromatography