(2S,4S,5R)-1-Acryloyl-5-((2S,3R)-1-but-3-enyl-3-methoxy-4-oxo-azetidin-2-yl)-2-methyl-pyrrolidine-2,4-dicarboxylic acid dimethyl ester 在
Grubbs catalyst first generation 作用下,
以
甲苯 为溶剂,
以58%的产率得到(Z)-(1R,2S,3R,12S,14S)-3-Methoxy-12-methyl-4,10-dioxo-5,11-diaza-tricyclo[9.3.0.0
2,5]tetradec-8-ene-12,14-dicarboxylic acid dimethyl ester