Journal
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
Volume 304, Issue 1-2, Pages 1-7Publisher
ELSEVIER
DOI: 10.1016/j.molcata.2009.01.010
Keywords
1,2-Glycerol carbonate; Carbon dioxide; Glycerol; Methanol assisted catalysts; (Bu2SnO)-Bu-n
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Selectively 1,2-glycerol carbonate was obtained from glycerol and carbon dioxide in methanol using 1 mol% (Bu2SnO)-Bu-n (dibutyltin(IV)oxide, 1) as a catalyst. The reaction attained equilibrium in 4 h and the yield of 1,2-glycerol carbonate obtained was as high as 35%. We observed the rate of the reaction depends oil the amount of the catalyst and methanol used. During the reaction We Could trap the intermediates and identify it by C-13 NMR, IR and mass spectrum of the reaction mixture. The reaction proceeds upon activation of 1 by methanol forming dibutyltindimethoxide followed by dibutyltinglycerate which undergoes CO2 insertion to produce non-isolable 7-membered tin-glycerolcarbonato complex that finally yield glycerol carbonate. Catalyst 1 was found to be successful even with 1,2-propanediol and ethylene glycol yielding the corresponding cyclic carbonate. (C) 2009 Elsevier B.V. All rights reserved.
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