Based upon a twofold bromine-lithium exchange with 2,5-dibromo thiophene and sequential trapping of the dilithio intermediate, organo zinc halides were generated in situ and subsequently transformed by Negishi cross-coupling to unsymmetrically substituted thiophenes in a one-pot fashion. Application of this novel sequence to diiodo(hetero)arenes quickly furnishes highly interesting building blocks for materials science applications.
通过与
2,5-二溴噻吩进行两重
溴-
锂交换,并依次捕获二
硫中间体,在原位生成了有机卤化
锌,随后通过内吉西交叉偶联以一锅方式转化为不对称取代的
噻吩。将这种新型序列应用于二
碘(杂)烷,可迅速为材料科学应用提供非常有趣的构建模块。