Abstract The 1,2‐di(bromoseleno)benzene has been found to be a bifunctional electrophile able to react with C‐H acids. The tandem diselenylation of the active methylene group in β‐diketones, β‐keto‐ and β‐cyanoesters, diethyl malonate, and malonitrile resulted in the ring closure on the carbon atom. Based on this reaction, 2,2‐disubstituted benzo‐1,3(2H)‐diselenoles, a new group of selenaheterocycles
摘要 1,2-二(
溴硒)苯是一种双功能亲电试剂,能够与 C-H 酸反应。
β-二酮、β-酮-和β-
氰基酯、
丙二酸二乙酯和
丙腈中活性亚甲基的串联二
硒化导致碳原子上的环闭合。基于该反应,以良好的收率获得了 2,2-二取代的苯并-1,3(2H)-二
硒烯,这是一组新的
硒杂环化合物。