Room-Temperature Synthesis of 2-Arylbenzothiazoles using Sulfuric Acid Immobilized on Silica as a Reusable Catalyst under Heterogeneous Condition

Application of sulfuric acid immobilized on silica gel as an efficient and benign catalyst has been explored in the synthesis of 2-arylbenzothiazoles via condensation reaction of aldehydes with 2-aminothiophenol. The reactions proceed under heterogeneous and mild conditions in ethanol at room temperature to provide 2-arylbenzothiazoles in high yields.