Cobalt-Catalyzed Reductive Alkylation of Heteroaryl Bromides: One-Pot Access to Alkylthiophenes, -furans, -selenophenes, and -pyrroles
作者:Deng-Jhou Cai、Po-Han Lin、Ching-Yuan Liu
DOI:10.1002/ejoc.201500784
日期:2015.8
A practical and convenient Co-catalyzed alkylation method for the facile introduction of various alkyl chains into organic electronically significant heteroaryl compounds, including thiophenes, furans, selenophenes, and pyrroles, is reported. Under well-optimized reaction conditions, a wide range of alkylated heteroaryl compounds have beeen efficiently prepared in moderate to good isolated yields.
报道了一种实用且方便的共催化烷基化方法,可将各种烷基链轻松引入具有电子意义的有机杂芳基化合物,包括噻吩、呋喃、硒吩和吡咯。在充分优化的反应条件下,广泛的烷基化杂芳基化合物已以中等至良好的分离产率有效制备。值得注意的是,在聚合物化学和有机材料中起决定性作用的 2- 或 3- 烷基噻吩首次通过这种使用廉价钴盐作为催化剂的还原偶联方法逐步经济地合成。这种简单的合成过程避免了传统烷基化方案所需的水分不稳定有机金属试剂(RMgX 或 RZnX)的制备。