methyl 2,3-pentadienoate   、                                                                                      
1,3-dibenzyl-2-N-phenylthiocarbamoylbenzimidazolium inner salt                                                                                                                                                                                              以
                                                                                         
苯                                                                                  为溶剂,
                                                                                                                                                    反应 2.0h,
                                                                                                                以70%的产率得到(Z,Z)-methyl 2-[1,3-dibenzyl-1,3,4',5'-tetrahydro-4'-methyl-2'-(phenylimino)spiro[2H-benzo[d]imidazole-2,3'(2'H)-thiophen]-5'-ylidene]acetate