Journal
NEW JOURNAL OF CHEMISTRY
Volume 38, Issue 6, Pages 2342-2347Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3nj01509b
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Funding
- Research Affairs Office of Bu-Ali Sina University [32-1716]
- University of Sayyed Jamaleddin Asadabadi
- University of KwaZulu-Natal, Durban, South Africa
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An efficient solvent-free protocol for the synthesis of tetrahydrobenzo[b]pyrans by the condensation of malononitrile, dimedone and various aldehydes in the presence of acetic acid functionalized imidazolium salts (1-carboxymethyl-3-methylimidazolium bromide {[cmmim]Br} and 1-carboxymethy1-3-methylimidazolium tetrafluoroborate {[cmmim][BF4]}) as reusable catalysts has been reported. The turn over frequency (TOF) values of the catalysts are higher than some of the previously reported catalysts. Also, thermal gravimetric analysis (TGA), differential thermal gravimetry (DTG), X-ray diffraction analysis (XRD) and calculations of the size and inter-planer distance of the catalysts have been reported in this work.
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