Carbonic acid 1-[1-(tert-butyl-dimethyl-silanyl)-2-ethylsulfanylthiocarbonylsulfanyl-4-oxo-azetidin-3-yl]-ethyl ester 2,2,2-trichloro-ethyl ester 在
三乙胺 作用下,
以
苯 为溶剂,
生成 {(2R,3R)-2-Ethylsulfanylthiocarbonylsulfanyl-4-oxo-3-[(R)-1-(2,2,2-trichloro-ethoxycarbonyloxy)-ethyl]-azetidin-1-yl}-methanesulfonyloxy-acetic acid allyl ester