Successful application of an ionic liquid carrying the fluoride counter-ion in biomacromolecular chemistry: microwave-assisted acylation of cellulose in the presence of 1-allyl-3-methylimidazolium fluoride/DMSO mixtures.
作者： Romeu Casarano , Omar A. El Seoud
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摘要: The use of ionic liquids with fluoride anion (IL-F) is challenging because side reactions. Neat 1-allyl-3-methylimidazolium (AlMeImF) used as a solvent in microwave-assisted acylation cellulose. results are disappointing due to reactions the IL proper, and F(-) -mediated hydrolysis produced ester. A dramatic improvement observed, when AlMeImF/DMSO mixture employed. comparable those obtained pure chloride FTIR spectroscopy shows that dissolving carboxylic acid anhydride IL-F leads formation acyl fluoride. Thus ILs far from being "spectator" solvents. new approach (use IL-F/DMSO) attractive its efficiency, low cost, applicability derivatization any polymer.
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