3-(4-chlorobenzyl)-4-methyl-2-phenylselenocarbamoylthiazolium inner salt 、
丁炔二酸二甲酯 以
苯 为溶剂,
反应 0.5h,
以93%的产率得到(E)-dimethyl 1-(4-chlorobenzyl)-3-(1,2-dimethoxycarbonylvinylthio)-2-methyl-4-phenyl-1,4-dihydroselenopheno[2,3-b]-pyrazine-6,7-dicarboxylate