N-苯基马来酰亚胺   、                                                                                      
(E)-1-ethoxycarbonylmethylene-3-(1-methylethenyl)-4,5-diphenyl-2,4-cycloheptadiene                                                                                                                                                                                              以
                                                                                         
1,1,2,2-四氯乙烷                                                                                  为溶剂,
                                                                                                                                                                                        以57%的产率得到ethyl (2E)-2-[(3aR,10aS,10bS)-5-methyl-1,3-dioxo-2,6,7-triphenyl-3a,4,8,9,10a,10b-hexahydrocyclohepta[e]isoindol-10-ylidene]acetate