Switchable Direct Oxygenative Arylation of C(sp<sup>3</sup>)–H Bonds via Electrophotocatalysis
作者:Yan Zhang、Xiang Sun、Ji-Hu Su、Tong Li、Chengbin Du、Kuiliang Li、Qi Sun、Zhenggen Zha、Zhiyong Wang
DOI:10.1021/acs.orglett.3c01751
日期:2023.7.14
A metal-free electrophotochemical C(sp3)-H arylation was developed under mild conditions. This method enables a switchable synthesis of diaryl alcohols and diaryl alkanes from inactive benzylic carbons. More importantly, a cheap and safe mediator N-chlorosuccinimide (NCS) was developed, which was employed for the hydrogen atom transfer (HAT) process of the benzylic C–H bond. In addition, this active
commercially available aldehydes (ketones) and benzylic alcohols can be readily arylated to provide a general and scalable access to structurally diverse alcohols (97 examples, >10 gram‐scale). More importantly, convergentpairedelectrolysis, the ideal but challenging electrochemical technology, was employed to transform low‐value alcohols into more useful alcohols. Detailed mechanism study suggests that two