(4-methoxyphenyl)methyl 2-[(2R,3S)-2-[(2R)-4-acetyloxy-3-oxobutan-2-yl]-4-oxo-3-[(1R)-1-trimethylsilyloxyethyl]azetidin-1-yl]-2-(triphenyl-lambda5-phosphanylidene)acetate 在
sodium methylate 作用下,
以
甲醇 为溶剂,
反应 0.33h,
以94%的产率得到[(2R,3S)-2-((R)-3-Hydroxy-1-methyl-2-oxo-propyl)-4-oxo-3-((R)-1-trimethylsilanyloxy-ethyl)-azetidin-1-yl]-(triphenyl-λ5-phosphanylidene)-acetic acid 4-methoxy-benzyl ester