[(3S,4R,3'S,4'R)-4,4'-Bis-benzo[1,3]dioxol-5-yl-2,2'-dioxo-3-(2-phenoxy-acetylamino)-[1,3']biazetidinyl-1'-yl]-acetic acid ethyl ester 在
sodium hydroxide 作用下,
以
丙酮 为溶剂,
以60%的产率得到[(3S,4R,3'S,4'R)-4,4'-Bis-benzo[1,3]dioxol-5-yl-2,2'-dioxo-3-(2-phenoxy-acetylamino)-[1,3']biazetidinyl-1'-yl]-acetic acid