Transition-Metal-Free Synthesis of 2-Substituted Benzothiazoles from Nitrobenzenes, Methylheteroaryl Compounds, and Elemental Sulfur, Based on Nitro-Methyl Redox-Neutral Cyclization
has been shown to promote the efficient synthesis of 2-substituted benzothiazoles from easily available nitrobenzenes, methyl-heteroaryl compounds, and elemental sulfur in the absence of transition-metal catalysts. The 2-substituted benzothiazoles were obtained in reasonable yields through the sulfuration of electron-deficient C–H bonds with elemental sulfur. This synthetic methodology also affords
N-Iodosuccinimide involved one-pot metal-free synthesis of 2-heteroaromatic benzothiazole compounds
作者:Xianglong Chu、Tiantian Duan、Xuan Liu、Lei Feng、Jiong Jia、Chen Ma
DOI:10.1039/c6ob02731h
日期:——
A one-pot protocol for the synthesis of structurally diverse 2-hetarylbenzothiazoles via oxidative condensation of the sp3 C–H bond with benzothiazoles has been described. This process is metal free and operationally simple. A series of 2-hetarylbenzothiazoles were prepared in moderate to good yield under mild conditions.
Three-component synthesis of 2-heteroaryl-benzothiazoles under metal-free conditions
作者:Guozheng Li、Hao Xie、Jinjin Chen、Yanjun Guo、Guo-Jun Deng
DOI:10.1039/c7gc01932g
日期:——
2-Heteroaryl-benzothiazole derivatives were selectively prepared from anilines, 2-methylquinolines and elemental sulfur under metal-free conditions.
2-杂环芳基苯并噻唑衍生物在无金属条件下从苯胺、2-甲基喹啉和元素硫中选择性地制备。
Saikachi,H.; Hisano,T., Chemical and pharmaceutical bulletin, 1960, vol. 8, p. 51 - 53
作者:Saikachi,H.、Hisano,T.
DOI:——
日期:——
Oxidative Cyclization of Thiobenzanilides to Benzothiazoles Using <i>N</i>-Benzyl-DABCO Tribromide under Mild Conditions
作者:Firouz Matloubi Moghaddam、Hassan Zali Boeini
DOI:10.1055/s-2005-869841
日期:——
N-benzyl-DABCO tribromide, a stable, crystalline organic ammonium tribromide (OATB), have been used as an alternative electrophilic bromine source for the efficient oxidative cyclization of thiobenzanilides to the corresponding benzothiazoles under mild conditions.