(Z)-4-(cyclohexylmethylene)-2-(3,4-dichlorophenyl)oxazol-5(4H)-one   、                                                                                      
bis(2,2,2-trifluoroethyl) malonate                                                                                                                                                              在
                                                                                                                                                                                 
(S,S)-DACH-phenyl Trost ligand   、                                                                                                  
tris(dibenzylideneacetone)dipalladium(0) chloroform complex                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                    反应 16.83h,
                                                                                                                以81%的产率得到(5S,6R,9S)-bis(2,2,2-trifluoroethyl) 6-cyclohexyl-2-(3,4-dichlorophenyl)-4-oxo-9-vinyl-3-oxa-1-azaspiro[4.4]non-1-ene-7,7-dicarboxylate