کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1390613 | 983112 | 2010 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: An efficient catalytic dehydration of fructose and sucrose to 5-hydroxymethylfurfural with protic ionic liquids An efficient catalytic dehydration of fructose and sucrose to 5-hydroxymethylfurfural with protic ionic liquids](/preview/png/1390613.png)
The renewable furan-based platform chemical, 5-hydroxymethylfurfural (HMF), has been efficiently synthesized from d-fructose and sucrose in the presence of a catalytic amount of protic ionic liquids. The 1-methylimidazolium-based and N-methylmorpholinium-based ionic liquids are employed. As a result, 74.8% and 47.5% yields of HMF are obtained from d-fructose and sucrose, respectively, at 90 °C for 2 h under nitrogen atmosphere when N-methylmorpholinium methyl sulfonate ([NMM]+[CH3SO3]−) is used as the catalyst in an N,N-dimethylformamide–lithium bromide (DMF–LiBr) system. The acidities of ionic liquids are determined by the Hammett method, and the correlation between acidity and catalytic activity is discussed. Moreover, the effects of reaction temperature and time are investigated, and a plausible reaction mechanism for the dehydration of d-fructose is proposed.
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Journal: Carbohydrate Research - Volume 345, Issue 12, 16 August 2010, Pages 1698–1701