2-[(E)-(3,3-dimethylbutylidene)amino]acetic acid tert-butyl ester 、
(Z)-2-(5-bromo-pyridin-2-yl)-3-(3-chloro-2-fluoro-phenyl)-acrylonitrile 、 、
三乙胺 以
二氯甲烷 为溶剂,
反应 18.0h,
以to give rac-(2R,3S,4S,5S)-4-(5-bromo-pyridin-2-yl)-3-(3-chloro-2-fluoro-phenyl)-4-cyano-5-(2,2-dimethyl-propyl)-pyrrolidine-2-carboxylic acid tert-butyl ester as a light yellow solid (0.85 g, 44%)的产率得到rac-(2R,3S,4S,5S)-4-(5-bromo-pyridin-2-yl)-3-(3-chloro-2-fluoro-phenyl)-4-cyano-5-(2,2-dimethyl-propyl)-pyrrolidine-2-carboxylic acid tert-butyl ester