Conversion of carbohydrates to 5-hydroxymethylfurfural: the nature of the observed selectivity decrease and microwave radiation effect
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- Khokhlova, E.A., Kachala, V.V. & Ananikov, V.P. Russ Chem Bull (2013) 62: 830. doi:10.1007/s11172-013-0112-3
The special NMR monitoring technique showed that conversion of glucose and fructose to 5-hydroxymethylfurfural in ionic liquids is highly selective and the formation of by-products, mainly oligomers, is related to further dehydration of 5-hydroxymethylfurfural. The replacement of usual heating by microwave irradiation provides high conversion of glucose (93%) and good yield of 5-hydroxymethylfurfural (85%) at 80 °C within 2.5 min.