Abstract Metal triflates and their mixtures with Bronsted acids are excellent catalysts for the selective and high yielding transformation of microcrystalline cellulose into ethyl levulinate, in ethanol, producing synergistic catalyst effects in some instances. The pretreatment of raw and unrefined cellulosic materials with a deep eutectic solvent enables similarly excellent catalysed conversion thereof into ethyl levulinate in superb yield (up to 75%) and selectivity (up to 88%). When using fermentation-derived ethanol, the product possesses 100% renewable content.

中文翻译：

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金属三氟甲磺酸盐是可调节的酸性催化剂，可将纤维素生物质高产转化为乙酰丙酸乙酯

摘要 金属三氟甲磺酸盐及其与布朗斯台德酸的混合物是微晶纤维素在乙醇中选择性高产转化为乙酰丙酸乙酯的优良催化剂，在某些情况下会产生协同催化作用。用深共熔溶剂对原料和未精制纤维素材料进行预处理，使其同样出色地催化转化为乙酰丙酸乙酯，收率（高达 75%）和选择性（高达 88%）。当使用发酵衍生的乙醇时，该产品具有 100% 的可再生成分。