8-(4-bromobenzylidene)-3,4,5,6,7,8-hexahydro-6-methyl-4-(4-bromophenyl)pyrido[4,3-d]pyrimidine-2(1H)-thione 、
碘乙烷 在
sodium hydroxide 作用下,
以
乙醇 为溶剂,
反应 2.0h,
以81%的产率得到8-(4-bromobenzylidene)-2-(ethylthio)-3,4,5,6,7,8,-hexahydro-6-methyl-4-(4-bromophenyl)pyrido[4,3-d]pyrimidine