Copper-Catalyzed Radical N-Demethylation of Amides Using <i>N</i>-Fluorobenzenesulfonimide as an Oxidant
作者:Xuewen Yi、Siyu Lei、Wangsheng Liu、Fengrui Che、Chunzheng Yu、Xuesong Liu、Zonghua Wang、Xin Zhou、Yuexia Zhang
DOI:10.1021/acs.orglett.0c00863
日期:2020.6.19
An unprecedented N-demethylation of N-methyl amides has been developed by use of N-fluorobenzenesulfonimide as an oxidant with the aid of a copper catalyst. The conversion of amides to carbinolamines involves successive single-electron transfer, hydrogen-atom transfer, and hydrolysis, and is accompanied by formation of N-(phenylsulfonyl)benzenesulfonamide. Carbinolamines spontaneously decompose to
通过在铜催化剂的帮助下使用N-氟苯磺酰亚胺作为氧化剂,已经开发出前所未有的N-甲基酰胺的N-去甲基化。酰胺向甲醇胺的转化涉及连续的单电子转移,氢原子转移和水解,并且伴随着N-(苯磺酰基)苯磺酰胺的形成。甲醇胺由于其固有的不稳定性,会自发分解为N-脱甲基酰胺和甲醛。