A novel and efficient iodine-catalyzed one-pot reaction of aromatic amines, acetophenones, and elemental sulfur for the synthesis of 2-aryl benzothiazoles is described. The process involves sequential C-S and C-N bond formation followed by C(CO)-C bond cleavage from readily accessible starting materials. A wide range of functional groups is tolerated under oxidant and metal-free condition and moderate to good product yields are obtained. (C) 2018 Elsevier Ltd. All rights reserved.
Iron-Promoted Three-Component 2-Substituted Benzothiazole Formation via Nitroarene <i>ortho</i>-C–H Sulfuration with Elemental Sulfur
作者:Qiaoyan Xing、Yanfeng Ma、Hao Xie、Fuhong Xiao、Feng Zhang、Guo-Jun Deng
DOI:10.1021/acs.joc.8b02619
日期:2019.2.1
A three-component procedure for the preparation of 2-substituted benzothiazoles from nitroarenes, alcohols, and sulfur powder is described. The reaction showed a good functional group tolerance to provide the heterocyclic products in moderate to good yields. The sequential assembly involving nitro reduction, C–N condensation, and C–S bond formation has been realized in one pot.