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首页> 外文期刊>ACS Sustainable Chemistry & Engineering >Biocatalytic Upgrading of 5-Hydroxymethylfurfural (HMF) with Levulinic Acid to HMF Levulinate in Biomass-Derived Solvents
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Biocatalytic Upgrading of 5-Hydroxymethylfurfural (HMF) with Levulinic Acid to HMF Levulinate in Biomass-Derived Solvents

机译：生物质溶剂中5-羟基羟甲基糠醛（HMF）与左旋丙酸的生物催化降解为HMF戊二酸酯

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摘要

Valorization of biomass-based platform chemicals into high value-added products has attracted increasing attention recently. In this work, upgrading of 5-hydroxymethylfurfual (HMF) and levulinic acid, two important biomass-based platform chemicals, to HMF levulinate via a green and efficient enzymatic approach was reported. Novozym 435 was found to be the best biocatalyst for the enzymatic esterification. The enzymatic esterification progressed smoothly in t-butanol, 2-methyl-2- butanol, and cyclopentyl methyl ether as well as in the ecofriendly biomass-derived 2-methyltetrahydrofuran (2-MeTHF), while no enzymatic reaction occurred in deep eutectic solvents. When HMF concentration was up to 500 mM, a good conversion of 72% was achieved in 2-MeTHF. The reaction temperature exerted a significant effect on the enzymatic esterification. When the reaction temperature is below 40 °C, high HMF conversions (>85%) were obtained. Besides, significant inactivation of the enzyme was observed at more than 50 °C, resulting in poor conversions.
机译：近来，将基于生物质的平台化学品转化为高附加值产品的关注日益受到关注。在这项工作中，据报道，通过绿色高效的酶促方法将两种重要的基于生物质的平台化学品5-羟甲基糠醛（HMF）和乙酰丙酸升级为乙酰丙酸。已发现Novozym 435是进行酶促酯化反应的最佳生物催化剂。在叔丁醇，2-甲基-2-丁醇和环戊基甲基醚中以及在生态友好的生物质衍生的2-甲基四氢呋喃（2-MeTHF）中，酶促酯化反应进展顺利，而在低共熔溶剂中未发生酶促反应。当HMF浓度高达500 mM时，在2-MeTHF中获得了72％的良好转化率。反应温度对酶促酯化有显着影响。当反应温度低于40℃时，获得高HMF转化率（＞ 85％）。此外，在高于50°C的温度下观察到了酶的显着失活，导致转化率很低。

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