Diethyl 2-dimethylamino-5-phenylthio-2,4-hexadienedioate 、 N-(dimethylamino-3-ethoxycarbonylpropenylidene)-N-methylmethanaminium tetrafluoroborate 、 、
sodium ethanolate 、
Ethyl (2,4,6-trimethylbenzylthio)acetate 在
silica 、
环己烷 、
乙酸乙酯 作用下,
以
乙醇 为溶剂,
以diethyl 2-dimethylamino-5-(2,4,6-trimethylbenzylthio)-2,4-hexadienedioate (6.44 g) is obtained in the form of a yellow oil的产率得到Diethyl 2-dimethylamino-5-(2,4,6-trimethylbenzylthio)-2,4-hexadienedioate