羧化
化学
光化学
碳负离子
氢原子
亲核细胞
氧化还原
电子转移
催化作用
氢
无机化学
立体化学
有机化学
烷基
作者
Wenke Li,Beiqi Sun,Lei Zhang,Fanyang Mo
标识
DOI:10.1021/acs.joc.3c02250
摘要
The direct carboxylation of the benzylic C–H bonds under mild conditions is of great importance and is quite challenging. Herein, we report an approach for the carboxylation of remote benzylic C(sp3)–H bonds by integrating the redox-neutral visible-light photoredox catalysis and the nitrogen-centered 1,5-hydrogen atom transfer. The chemical transformation progresses via consecutive single electron transfer, 1,5-hydrogen atom transfer, formation of benzylic carbanion, and nucleophilic attack on the CO2 steps, thereby enabling access to the desired carboxylation products with moderate to high yields. We also endeavor to recover the CO2 groups generated in situ intramolecularly to achieve carboxylation under a nitrogen atmosphere, resulting in moderate yields of corresponding carboxylation.
科研通智能强力驱动
Strongly Powered by AbleSci AI