(2S,4R)-4-benzyloxy-2-dimethoxymethyl-pyrrolidine 、
methyl(S)-[(S)-2,2-dimethyl-1,3-dioxolan-4-yl](trifluoromethylsulfonyloxy)acetate 在
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
以65%的产率得到(2S)-methyl-2-[(2S,4R)-4-(benzyloxy)-2-(dimethoxyethyl)pyrrolidin-1-yl]-2-[(R)-2,2-dimethyl-1,3-dioxolan-4-yl]acetate