2-丙炔-1-醇 、 methyl (3S,5R,6S)-6-[(R)-1-((t-butyldimethylsi1yl)oxy)ethyl]penicillanate-1β-oxide 以
甲苯 为溶剂,
以80%的产率得到(R)-2-[(2R,3S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-2-(3-hydroxy-prop-1-ene-2-sulfinyl)-4-oxo-azetidin-1-yl]-3-methyl-but-3-enoic acid methyl ester