Cu-mediated one-pot three-component synthesis of 3-N-substituted 1,4,2-benzodithiazine 1,1-dioxide derivatives
作者:Wei Dong、Zemei Ge、Xin Wang、Ridong Li、Runtao Li
DOI:10.1016/j.tet.2020.131354
日期:2020.7
A novel and efficient copper-catalyzed one-pot procedure for the synthesis of 3-N-substituted 1,4,2-benzodithiazine 1,1-dioxide derivatives from 2-halobenzenesulfonamides, amines and CS2 is described. The reaction proceeds through Ullmann-type S-arylation, intramolecular addition of NH2 with CS and dehydrosulfide, which provides a new and useful strategy for construction of cyclic aromatic sulfonamides