Abstract
Sulfonated carbon/silica composites derived from biomaterials viz. glucose, maltose, cellulose, chitosan and starch exhibited high catalytic activity for the one-pot synthesis of Hantzsch 1,4-dihydropyridines under solvent-free conditions, and for one-pot synthesis of 2,4,5-trisubstituted imidazoles and 2-arylbenzimidazoles under liquid phase catalysis. The activity of sulfonated carbon/silica composites derived from starch was found to be superior to other sulfonated carbon/ silica composites. The excellent conversions showed that the catalyst has strong and sufficient acidic sites, which are responsible for its catalytic performance. Moreover, these solid acid catalysts owned the advantages of high selectivity and recyclability.
Keywords: 2-arylben-zimidazoles, hantzsch 1, 4-dihydropyridines, sulfonated carbon/silica composites, solid acid catalysts, 2, 4, 5-trisubstituted imidazoles.
Current Catalysis
Title:Sulfonated Carbon/Silica Composites: Highly Efficient Heterogeneous Catalysts for the One-Pot Synthesis of Hantzsch 1,4-dihydropyridines, 2,4,5-trisubstituted Imidazoles and 2-arylbenzimidazoles
Volume: 3 Issue: 1
Author(s): Princy Gupta and Satya Paul
Affiliation:
Keywords: 2-arylben-zimidazoles, hantzsch 1, 4-dihydropyridines, sulfonated carbon/silica composites, solid acid catalysts, 2, 4, 5-trisubstituted imidazoles.
Abstract: Sulfonated carbon/silica composites derived from biomaterials viz. glucose, maltose, cellulose, chitosan and starch exhibited high catalytic activity for the one-pot synthesis of Hantzsch 1,4-dihydropyridines under solvent-free conditions, and for one-pot synthesis of 2,4,5-trisubstituted imidazoles and 2-arylbenzimidazoles under liquid phase catalysis. The activity of sulfonated carbon/silica composites derived from starch was found to be superior to other sulfonated carbon/ silica composites. The excellent conversions showed that the catalyst has strong and sufficient acidic sites, which are responsible for its catalytic performance. Moreover, these solid acid catalysts owned the advantages of high selectivity and recyclability.
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Cite this article as:
Gupta Princy and Paul Satya, Sulfonated Carbon/Silica Composites: Highly Efficient Heterogeneous Catalysts for the One-Pot Synthesis of Hantzsch 1,4-dihydropyridines, 2,4,5-trisubstituted Imidazoles and 2-arylbenzimidazoles, Current Catalysis 2014; 3 (1) . https://dx.doi.org/10.2174/22115447113029990015
DOI https://dx.doi.org/10.2174/22115447113029990015 |
Print ISSN 2211-5447 |
Publisher Name Bentham Science Publisher |
Online ISSN 2211-5455 |
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