An economic, simple and convenient synthesis of 2-aryl/heteroaryl/styryl/alkylbenzothiazoles using SiO 2 –HNO 3
Research on Chemical Intermediates(2014)
Abstract
The present work was undertaken to develop an economic method for the synthesis of 2-aryl/heteroaryl/styryl/alkylbenzothiazoles mediated by SiO 2 –HNO 3 . In this report, we have demonstrated the catalytic potential of SiO 2 –HNO 3 for the oxidative condensation of 2-aminothiophenol and aldehydes. Instant reaction at room temperature under solvent-free condition, high substrate to catalyst ratio 50:1 (by weight), practical application by large-scale synthesis, and excellent yields are the main advantages of the present protocol. Graphical Abstract
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Key words
2-Aminothiophenol,Aldehydes,2-Aryl/heteroaryl/styryl/alkylbenzothiazoles,Nitric acid,Silica gel
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