反应详情

In a manner similar to the method described in Example 1c, {[1-(3-Chloro-phenyl)-meth-(E)-ylidene]-amino}-acetic acid tert-butyl ester prepared in Example 32a (2 g, 7.6 mmol) was reacted with (Z)-3-(3-chloro-phenyl)-2-(4-chloro-phenyl)-acrylonitrile (0.55 g, 2 mmol) prepared in Example 1b, AgF (1.3 g, 10 mmol), and triethylamine (1.9 g, 19 mmol) in dichloromethane (30 mL) at 50° C. for 20 h to give rac-(2R,3R,4R,5S)-3,5-bis-(3-chloro-phenyl)-4-(4-chloro-phenyl)-4-cyano-pyrrolidine-2-carboxylic acid tert-butyl ester as a white foam (0.45 g, 44%).