反应详情

Analogous to the procedure described for Example 1A, Step B, 5-[4-(3-chloro-phenyl)-3-oxo-butyl]-pyrrolidin-2-one (1.9 g, 7.15 mmol) was reduced with NaBH4 (135 mg, 3.57 mmol). Purification by medium pressure chromatography eluting with a solvent gradient (1:1 hexanes:EtOAc to EtOAc to 1% MeOH in CH2Cl2 to 4% MeOH in CH2Cl2 to 8% MeOH in CH2Cl2) provided 5-[4-(3-chloro-phenyl)-3-hydroxy-butyl]-pyrrolidin-2-one (1.53 g). 1H NMR (CDCl3) δ7.22 (m, 3H), 7.07 (m, 1H), 6.51 (d, 1H), 3.82 (m, 1H), 3.66 (m, 1H), 2.77 (m, 1H), 2.66 (m, 1H), 2.33–2.19 (m, 3H), 2.04 (d, 1H), 1.74–1.45 (m, 5H); MS 268.2 (M+1).

1. customPurification by medium pressure chromatography
2. washeluting with a solvent gradient (1:1 hexanes:EtOAc to EtOAc to 1% MeOH in CH2Cl2 to 4% MeOH in CH2Cl2 to 8% MeOH in CH2Cl2)