反应详情

Using the procedure to synthesize Example 1 and using reagents 1-cyclohexyl-pyrrolidin-2-one (500 mg, 3.0 mmol), LDA (2.0 M, 1.8 mL, 3.6 mmol) and 2,4-dichlorobenzaldehyde (630 mg, 3.6 mmol) affords 530 mg (53%) of the title compound as a white solid. Separate the diastereomers over silica gel (30% ethyl acetate in hexanes) Isomer 1 (Example 78): (25%) Mass spectrum (apci) m/z=342.0 (M+H). HPLC (5 to 95) Rt (Purity at 220 mn)=3.77 min (98%). Isomer 2 (Example 79): (28%) Mass spectrum (apci) m/z=342.0 (M+H). HPLC (5 to 95) Rt (Purity at 220 nm)=3.52 min (100%).

1. customto synthesize Example 1