Electrochemical synthesis of sulfonated benzothiophenes using 2-alkynylthioanisoles and sodium sulfinates†
Wen-Chao
Yang 
*a
and
Lei
Wang
*b
*a
and
Lei
Wang
*b
Abstract
Electrochemical sulfonylation/cyclization of 2-alkynylthioanisoles with sodium sulfinates was developed under catalyst-, external oxidant- and metal-free conditions. The electrosynthesis provides sustainable and efficient access to 3-sulfonated benzothiophenes with good substrate scope and functional group tolerance. This cascade radical process has been triggered through a sulfonyl radical addition to alkynes using sodium sulfinates under electrochemical conditions.
- This article is part of the themed collections: Synthetic electrochemistry and Synthetic methodology in OBC
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