Efficient synthesis of 1,2-benzisothiazoles from o-haloarylamidines and elemental sulfur via N–S/C–S bond formation under transition-metal-free conditions
CuBr<sub>2</sub>-Catalyzed Annulation of 2-Bromo-<i>N</i>-Arylbenzimidamide with Se/S<sub>8</sub> Powder for the Synthesis of Benzo[<i>d</i>]isoselenazole and Benzo[<i>d</i>]isothiazole
作者:Quanyuan Wang、Fuhong Xiao、Zhi Huang、Guojiang Mao、Guo-Jun Deng
DOI:10.1021/acs.joc.2c02088
日期:2023.2.17
A CuBr2-catalyzed annulation of 2-bromo-N-arylbenzimidamide with selenium/sulfur powder for the synthesis of benzo[d]isoselenazole and benzo[d]isothiazole in generally good yields was investigated. This synthetic strategy features good substrate scope and functional group tolerance. Furthermore, the corresponding products could be converted into N-aryl indoles via rhodiumIII-catalyzed ortho C–H activation
研究了CuBr 2催化的 2-溴-N-芳基苯甲酰胺与硒/硫粉的环化反应,用于合成苯并 [ d ] 异硒唑和苯并 [ d ] 异噻唑,收率一般较高。这种合成策略具有良好的底物范围和官能团耐受性。此外,相应的产物可以通过铑III催化的N-苯环的邻位C-H活化转化为N-芳基吲哚,为轴向芳香分子提供了一种有效的途径。
Efficient synthesis of 1,2-benzisothiazoles from <i>o</i>-haloarylamidines and elemental sulfur <i>via</i> N–S/C–S bond formation under transition-metal-free conditions
作者:Hao Xie、Guozheng Li、Feng Zhang、Fuhong Xiao、Guo-Jun Deng
DOI:10.1039/c7gc03599c
日期:——
Facile synthesis of 1,2-benzisothiazoles from amidines and elemental sulfur via N–S/C–S bond formation under transition-metal-free conditions has been developed with good tolerance of a broad range of functional groups.