Cascade Trisulfur Radical Anion (S<sub>3</sub><sup>•–</sup>) Addition/Electron Detosylation Process for the Synthesis of 1,2,3-Thiadiazoles and Isothiazoles
作者:Bei-Bei Liu、Hui-Wen Bai、Huan Liu、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1021/acs.joc.8b01450
日期:2018.9.7
Trisulfur radical anion (S3•–) mediated reactions with in situ formed azoalkenes and α,β-usaturated N-sulfonylimines for the construction of 1,2,3-thiadiazoles and isothiazoles has been developed. S3•– is in situ generated from potassium sulfide in DMF. These two approaches provide a new, safe, and simple way to construct 4-subsituted 1,2,3-thiadiazoles, 5-subsituted 1,2,3-thiadiazoles, and isothiazole
已经开发了三硫自由基阴离子(S 3 •–)与原位形成的偶氮烯烃和α,β-过饱和的N-磺酰亚胺类化合物介导的反应,用于构建1,2,3-噻二唑和异噻唑。S 3 •–是由DMF中的硫化钾原位生成的。这两种方法提供了一种新的,安全的和简单的方法来以高收率构建4-取代的1,2,3-噻二唑,5-取代的1,2,3-噻二唑和异噻唑。反应包括在温和条件下通过S 3 •加成形成新的C–S和N–S键和电子脱甲苯基化反应。