(2R,4S)-4-{(3,5-bis-trifluoromethyl-benzyl)-[5-((E)-2-methoxycarbonyl-vinyl)-pyrimidin-2-yl]-amino}-2-ethyl-pyrrolidine-1-carboxylic acid tert-butyl ester 在
钯 silica gel 、
ethyl acetate n-hexane 作用下,
以
乙醇 为溶剂,
以to give (2R,4S)-4-{(3,5-bis-trifluoromethyl-benzyl)-[5-(2-methoxycarbonyl-ethyl)-pyrimidin-2-yl]-amino}-2-ethyl-pyrrolidine-1-carboxylic acid tert-butyl ester (198 mg, 99%)的产率得到(2R,4S)-4-{(3,5-bis-trifluoromethyl-benzyl)-[5-(2-methoxycarbonyl-ethyl)-pyrimidin-2-yl]-amino}-ethyl-pyrrolidine-1-carboxylic acid tert-butyl ester