Electrochemical Oxidative Syntheses of NH‐Sulfoximines, NH‐Sulfonimidamides and Dibenzothiazines via Anodically Generated Hypervalent Iodine Intermediates
Xianqiang Kong, Long Lin, Xiao‐Hui Chen, Yiyi Chen, Wei Wang, Bo Xu
Abstract
Herein, we report a general method for the synthesis of NH-sulfoximines and NH-sulfonimidamides through direct electrochemical oxidative catalysis involving an iodoarene(I)/iodoarene(III) redox couple. In addition, dibenzothiazines can be synthesized from [1,1'-biaryl]-2-sulfides under standard conditions. Notably, only a catalytic amount of iodoarene is required for the generation in situ of an active hypervalent iodine catalyst, which avoids the need for an excess of a hypervalent iodine reagent relative to conventional approaches. Moreover, this protocol features broad substrate scope and wide functional group tolerance, delivering the target compounds with good-to-excellent yields even for a scale of more than 10 g.