反应详情

In a manner similar to the method described in Example 25a, rac-(2R,3S,4R,5S)-4-(4-chloro-2-fluoro-phenyl)-3-(5-chloro-2-methoxy-phenyl)-4-cyano-5-(2,2-dimethyl-propyl)-pyrrolidine-2-carboxylic acid tert-butyl ester prepared in Example 85b (0.3 g, 0.56 mmol) was reacted with trifluoroacetic acid in dichloromethane at room temperature to give rac-(2R,3S,4R,5S)-4-(4-chloro-2-fluoro-phenyl)-3-(5-chloro-2-methoxy-phenyl)-4-cyano-5-(2,2-dimethyl-propyl)-pyrrolidine-2-carboxylic acid trifluoroacetic acid as a white solid (0.32 g, 97%).