Low chemical stability and high oxygen content limit utilization of the bio‐based platform chemical 5‐(hydroxymethyl)furfural (HMF) in biofuels development. In this work, Lewis‐acid‐catalyzed conversion of renewable 6‐deoxy sugars leading to formation of more stable 5‐methylfurfural (MF) is carried out with high selectivity. Besides its higher stability, MF is a deoxygenated analogue of HMF with increased C/O ratio. A highly selective synthesis of the innovative liquid biofuel 2,5‐dimethylfuran starting from MF under mild conditions is described. The superior synthetic utility of MF against HMF in benzoin and aldol condensation reactions leading to long‐chain alkane precursors is demonstrated.

中文翻译：

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迈向改进的生物精炼技术：5-甲基糠醛可作为多功能的C6平台用于生物燃料开发

低化学稳定性和高氧含量限制了在生物燃料开发中利用基于生物的平台化学物质5-（羟甲基）糠醛（HMF）。在这项工作中，路易斯酸催化可再生6-脱氧糖的转化导致形成更稳定的5-甲基糠醛（MF），具有很高的选择性。除了具有更高的稳定性外，MF还是HMF的脱氧类似物，具有更高的C / O比。描述了在温和条件下以MF为起始原料的高选择性合成新型液态生物燃料2,5-二甲基呋喃的方法。证明了MF相对于HMF在苯偶姻和醛醇缩合反应中可产生长链烷烃前体的优异合成效用。