methyl hexa-2,3-dienoate 、
1,3-dibenzyl-2-N-phenylthiocarbamoylbenzimidazolium inner salt 以
苯 为溶剂,
反应 2.0h,
以82%的产率得到(Z,Z)-methyl 2-[1,3-dibenzyl-4'-ethyl-1,3,4',5'-tetrahydro-2'-(phenylimino)spiro[2H-benzo[d]imidazole-2,3'(2'H)-thiophen]-5'-ylidene]acetate