Interactions of Ionic Liquids with Polysaccharides 1. Unexpected Acetylation of Cellulose with 1-Ethyl-3-methylimidazolium Acetate

Autor:	Wolfgang Günther, Frank Meister, Thomas Heinze, Michael Schöbitz, Tim Liebert, Sarah Köhler, Jens Schaller
Rok vydání:	2007
Předmět:	chemistry.chemical_classification Polymers and Plastics Organic Chemistry Sulfonyl halide Polysaccharide Cellulose acetate Chloride Acetic acid chemistry.chemical_compound chemistry Triphenylmethyl chloride Ionic liquid Materials Chemistry medicine Organic chemistry Cellulose medicine.drug
Zdroj:	Macromolecular Rapid Communications. 28:2311-2317
ISSN:	1521-3927 1022-1336
DOI:	10.1002/marc.200700529
Popis:	The homogeneous conversion of cellulose in the ionic liquid 1-ethyl-3-methylimidazolium acetate with 2-furoyl chloride, p-toluenesulfonyl chloride, and triphenylmethyl chloride yields surprisingly pure cellulose acetate samples in any case. From NMR spectroscopic studies, it may be concluded that during the homogeneous functionalization reactive intermediates including furane-2-carboxylic acid/acetic acid anhydride and acetic acid triphenylmethyl ester are formed leading to the cellulose acetates with DS values in the range from 0.55 to 1.86.
Databáze:	OpenAIRE
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