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