Ru(III)-catalyzed oxidative reaction in ionic liquid: an efficient and practical route to 2-substituted benzothiazoles and their hybrids with pyrimidine nucleoside
作者:Xuesen Fan、Yangyang Wang、Yan He、Xinying Zhang、Jianji Wang
DOI:10.1016/j.tetlet.2010.04.050
日期:2010.7
environmentally benign synthesis of 2-substituted benzothiazoles was developed through RuCl3-catalyzed oxidative condensation of 2-aminothiophenol with aldehyde in ionic liquid by using air as the oxidant. With this procedure, a series of 2-substituted benzothiazoles and benzothiazole/pyrimidine nucleoside hybrids with antimicrobial activities were efficiently prepared from easily accessible starting materials
This work reports a novel and efficient method for the synthesis of benzothiazoles using 2-aminothiophenolderivatives in conjunction with aromatic aldehyde as starting materials via visible-light-induced condensation cyclization. Utilizing fluorescein as the photocatalyst and blue LED lamp as the light source, the reaction proceeds in the presence of a molecular oxygen atmosphere without the need
One-pot approach for the synthesis of 2-aryl benzothiazoles via a two-component coupling of gem-dibromomethylarenes and o-aminothiophenols
作者:Chandrappa Siddappa、Vinaya Kambappa、Muddegowda Umashankara、Kanchugarakoppal S. Rangappa
DOI:10.1016/j.tetlet.2011.08.055
日期:2011.10
One-pot synthesis of 2-aryl benzothiazoles from gem-dibromomethylarenes using 2-aminoarylthiols is described. Benzothiazoles were obtained in high chemical yields under mild conditions. This transformation would facilitate synthesis by short reaction times, large-scale synthesis, easy and quick isolation of the products, which are the main advantages of this procedure. (C) 2011 Published by Elsevier Ltd.