International Journal of the Biology, Chemistry, Physics, and Technology of Wood
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Synthesis of glucose esters from cellulose in ionic liquids
1Center for Surface Chemistry and Catalysis, K.U. Leuven, Heverlee, Belgium
2Department of Chemistry, Molecular Design and Synthesis, K.U. Leuven, Heverlee, Belgium
Citation Information: Holzforschung. Volume 66, Issue 4, Pages 417–425, ISSN (Online) 1437-434X, ISSN (Print) 0018-3830, DOI: 10.1515/hf.2011.161, November 2011
- Published Online:
The transformation of cellulose into glucose ester α-d-glucose pentaacetate (GPAc) was carried out in ionic liquid 1-butyl-3-methylimidazolium chloride under mild reaction conditions. The reaction comprises two steps: the first involves a hydrolysis reaction, yielding α-d-glucose and glucose oligomers; and then only after some time, the acetylating reagent acetic anhydride is added. Under optimized conditions and with the acidic resin Amberlyst 15DRY as a hydrolysis catalyst, a 70% yield of GPAc was obtained. This product could be quantitatively isolated by simple liquid-liquid extraction, which allowed easy recycling of the ionic liquid and catalyst.
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