Abstract
A new approach for the synthesis of benzimidazoles using ionogel under solvent-free conditions is reported. Catalytic activity of ionogel was compared with silica coated with ionic liquid (silica-IL) and it was found that ionogel is highly active compared to silica-IL for the synthesis of benzimidazoles. Moreover, ionogel was recyclable for the synthesis of benzimidazoles.
An efficient synthetic approach for the synthesis of benzimidazoles catalyzed by highly active ionogel under solvent-free conditions has been described.
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Acknowledgements
We are sincerely thankful to the Director, IIIM Jammu and SAIF Chandigarh for facilities for spectra; Head, Central Research facility section, IIT Roorkee for SEM and TEM. We also thank the Department of Chemistry, University of Jammu, for NMR, FTIR and TGA analysis.
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Supplementary file contains details on preparation of the ionic liquid and its characterization, preparation of the ionogel and silica-supported catalyst, characterization of the ionogel including SEM, TEM, FTIR and TGA. It also contains spectral data of the synthesized compounds.
Supplementary Information is available at www.ias.ac.in/chemsci.
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SHARMA, P., GUPTA, M. 1,3,5-Trimethylpyrazolium chloride based ionogel as an efficient and reusable heterogeneous catalyst for the synthesis of benzimidazoles. J Chem Sci 128, 61–65 (2016). https://doi.org/10.1007/s12039-015-1000-1
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DOI: https://doi.org/10.1007/s12039-015-1000-1