(2S,4S,5R)-1-Acryloyl-5-((2S,3R)-3-methoxy-4-oxo-1-pent-4-enyl-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35%的产率得到(E)-(1R,2S,3R,13S,15S)-3-Methoxy-13-methyl-4,11-dioxo-5,12-diaza-tricyclo[10.3.0.0
2,5]pentadec-9-ene-13,15-dicarboxylic acid dimethyl ester