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Issue 2, 2015
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Silica functionalized sulphonic acid coated with ionic liquid: an efficient and recyclable heterogeneous catalyst for the one-pot synthesis of 1,4-dihydropyridines under solvent-free conditions

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Abstract

Silica-supported sulphonic acid catalysts were prepared and coated with ionic liquid, and their catalytic activities were evaluated for the one-pot synthesis of 1,4-dihydropyridines. Different catalysts with an ionic liquid layer (SCILLs) have been prepared with a view to determine the most active catalyst. Silica sulphonic acid coated with [BMIM][PF6] was found to be the most active catalyst and can be recycled for several runs without the loss of significant activity. It was characterized using SEM, TEM, TGA and FTIR.

Graphical abstract: Silica functionalized sulphonic acid coated with ionic liquid: an efficient and recyclable heterogeneous catalyst for the one-pot synthesis of 1,4-dihydropyridines under solvent-free conditions

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Article information


Submitted
20 May 2014
Accepted
18 Oct 2014
First published
19 Nov 2014

Green Chem., 2015,17, 1100-1106
Article type
Paper

Silica functionalized sulphonic acid coated with ionic liquid: an efficient and recyclable heterogeneous catalyst for the one-pot synthesis of 1,4-dihydropyridines under solvent-free conditions

P. Sharma and M. Gupta, Green Chem., 2015, 17, 1100
DOI: 10.1039/C4GC00923A

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