Tosic Acid-on-Silica Gel: A Cheap and Eco-friendly Catalyst for a Convenient One-pot Synthesis of Substituted Benzimidazoles |
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| Authors: | Manas Chakrabarty Ratna Mukherjee Sulakshana Karmakar Yoshihiro Harigaya |
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| Institution: | (1) Department of Chemistry, Bose Institute, Kolkata, India;(2) Department of Pharmaceutical Sciences, Kitasato University, Tokyo, Japan |
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| Abstract: | Summary. 2-Substituted and 1,2-disubstited benzimidazoles were prepared efficiently from o-phenylenediamines and aryl aldehydes using p-toluenesulphonic acid (5 mol%)-on-silica gel as a cheap and environmentally benign catalyst. |
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| Keywords: | , Benzimidazoles, Synthesis, o-Phenylenediamines, Aryl aldehydes, Tosic acid-on-silica gel, |
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