Journal
GREEN CHEMISTRY
Volume 13, Issue 10, Pages 2859-2868Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1gc15550d
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Funding
- University Grant Commission (UGC), India
- University of Delhi
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The common Lewis acid AlCl3 has efficiently produced 5-hydroxymethylfurfural (HMF) from carbohydrate and biopolymer substrates in water, DMSO, and water-methylisobutylketone biphasic solvents under microwave irradiation. The yield of HMF in different solvents follows an increasing order from water to water-MIBK biphasic solvent to DMSO. The yield of HMF increased with an increase in catalyst loading whereas it remains unchanged upon increase of the carbohydrate concentration. In most reactions, the maximum yield of HMF is recorded within 2 min of reaction time. The mechanism of the AlCl3 catalyzed glucose dehydration reaction is proposed to proceed through the isomerization of glucopyranose to fructofuranose, followed by a proton assisted transformation of fructofuranose to HMF.
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