Microwave-promoted conversion of concentrated fructose into 5-hydroxymethylfurfural in ionic liquids in the absence of catalysts |
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Authors: | Changzhi LiZongbao K Zhao Haile CaiAiqin Wang Tao Zhang |
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Affiliation: | Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, PR China |
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Abstract: | Under microwave irradiation, concentrated fructose (33-92 wt%) in ionic liquids afforded 5-hydroxymethylfurfural in ca. 97-57% yields without addition of catalysts, within 3 min. In-situ13C NMR and 1H NMR spectra suggest that the transformation of fructose in ionic liquid is a highly selective reaction that proceeds predominantly via the cyclic fructofuransyl intermediate. This method is expected to be valuable in facilitating cost-effective conversion of carbohydrates into biofuels and platform chemicals. |
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Keywords: | Biofuel Carbohydrates 5-Hydroxymethylfurfural Ionic liquids Microwave irradiation Dehydration reaction |
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