Cp*Co(III)-Catalyzed C–H Alkylation with Maleimides Using Weakly Coordinating Carbonyl Directing Groups
作者:Rajib Mandal、Balakumar Emayavaramban、Basker Sundararaju
DOI:10.1021/acs.orglett.8b00761
日期:2018.5.18
A novel protocol for ortho-C–H alkylation of aromatic and heteroaromatic ketones and esters under Cp*Co(III) catalysis has been developed for the first time. The reaction proceeds through initial cyclometalation via weak chelation-assisted C–H bond activation, followed by coordination of activated alkene, insertion between Co–C, and protodemetalation.
首次开发了在Cp * Co(III)催化下芳族和杂芳族酮和酯的邻位C-H烷基化的新方案。该反应通过弱螯合辅助的C–H键活化作用进行的初始环金属化反应进行,随后是活化烯烃的配位,Co–C之间的插入和原金属的脱金属反应。