(E)-3-{(2R,3S)-1-[(S)-2-Methanesulfonyloxy-1-((4S,5R,4'R)-2,2,2',2'-tetramethyl-[4,4']bi[[1,3]dioxolanyl]-5-yl)-ethyl]-3-methoxy-4-oxo-azetidin-2-yl}-acrylic acid benzyl ester 在
红铝 、 copper(I) bromide 作用下,
以
四氢呋喃 为溶剂,
生成 3-{(2R,3S)-1-[(S)-2-Methanesulfonyloxy-1-((4S,5R,4'R)-2,2,2',2'-tetramethyl-[4,4']bi[[1,3]dioxolanyl]-5-yl)-ethyl]-3-methoxy-4-oxo-azetidin-2-yl}-propionic acid benzyl ester