苯氧乙酰氯 、
(S)-2-{[1-(3,4-Dimethoxy-phenyl)-meth-(Z)-ylidene]-amino}-3-methyl-butyric acid ethyl ester 在
三乙胺 作用下,
以
二氯甲烷 为溶剂,
生成 (S)-2-[(2R,3S)-2-(3,4-Dimethoxy-phenyl)-4-oxo-3-phenoxy-azetidin-1-yl]-3-methyl-butyric acid ethyl ester 、 (S)-2-[(2S,3R)-2-(3,4-Dimethoxy-phenyl)-4-oxo-3-phenoxy-azetidin-1-yl]-3-methyl-butyric acid ethyl ester