Chlorocarbonylmethyl-methyl-carbamic acid allyl ester 、 silver salt of 2-[(3S,4R)-3-(tert.-butyl-dimethyl-silyloxymethyl)-4-mercapto-2-oxo-azetidin-1-yl]-2-triphenylphosphoranylideneacetic acid allyl ester 在
吡啶 作用下,
以
二氯甲烷 为溶剂,
反应 0.5h,
生成
[(2R,3S)-2-[2-(Allyloxycarbonyl-methyl-amino)-acetylsulfanyl]-3-(tert-butyl-dimethyl-silanyloxymethyl)-4-oxo-azetidin-1-yl]-(triphenyl-λ5-phosphanylidene)-acetic acid allyl ester