(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