(E)-4-Bromo-3-hydroxy-2-[(2S,3S)-2-methanesulfonyloxymethyl-3-(5-nitro-1,3-dioxo-1,3-dihydro-isoindol-2-yl)-4-oxo-azetidin-1-yl]-but-2-enoic acid benzhydryl ester 在
碳酸氢钠 作用下,
以
丙酮 为溶剂,
反应 1.0h,
生成
benzhydryl (6S,7S)-3-(bromomethyl)-7-(4-nitrophthalimido)-8-oxo-1-aza-4-oxabicyclo<4.2.0>oct-2-ene-2-carboxylate