Iron-Catalyzed Regioselective α-C–H Alkylation of <i>N</i>-Methylanilines: Cross-Dehydrogenative Coupling between Unactivated C(sp<sup>3</sup>)–H and C(sp<sup>3</sup>)–H Bonds via a Radical Process
作者:Ze-Lin Li、Kang-Kang Sun、Peng-Yu Wu、Chun Cai
DOI:10.1021/acs.joc.9b00625
日期:2019.6.7
without any directing group by cross-dehydrogenative coupling between unactivated C(sp3)–H and C(sp3)–H bonds has been established for the first time, which provides a good complement to C(sp3)–H activation reactions and expands the field of Fe-catalyzed C–H functionalizations. Many different C(sp3)–H bonds in cyclic alkanes, cyclic ethers, and toluene derivatives can be used as coupling partners. Mechanistic
首次建立了未活化的C(sp 3)-H和C(sp 3)-H键之间的交叉脱氢偶联的铁催化的N-甲基苯胺的α-C-H烷基化反应,而没有任何引导基团,这是第一次。为C(sp 3)–H活化反应提供了很好的补充,并扩展了铁催化的CH–H功能化的领域。环状烷烃,环状醚和甲苯衍生物中的许多不同的C(sp 3)–H键都可以用作偶联伙伴。还介绍了机理研究,包括自由基反应过程,各种试剂的主要作用以及动力学同位素效应实验。