[2-((E)-2-Acetylamino-vinylsulfanylcarbonylmethyl)-4-oxo-azetidin-1-yl]-(triphenyl-λ
5-phosphanylidene)-acetic acid 4-nitro-benzyl ester 以
甲苯 为溶剂,
反应 48.0h,
以25%的产率得到(E)-p-nitrobenzyl 3-(2-acetamidoethenylthio)-7-oxo-1-azabicyclo<3.2.0>hept-2-ene-2-carboxylate