Conversion of biomass-derived sugars to 1,1,2-trialkoxyethane <i>via</i> a [2 + 4] retro-aldol reaction over alkaline and alkaline earth metal salts of phosphotungstic acid
作者:Tihang Liu、Jiangang Wang、Hongyou Cui、Jinghua Wang
DOI:10.1039/d3gc00587a
日期:——
different alcohols (methanol, ethanol, 1-propyl alcohol, 2-propyl alcohol, and 1-butanol) were also investigated. It was found that alkali and alkaline earth metal monohydrogen salts of HPW were effective catalysts and the stronger the alkalinity of the metal elements, the higher the catalytic activity. Cs2HPW showed the best activity in catalyzing the conversion of glucose to TriAE via [2 + 4] retro-aldol
1,1,2-三烷氧基乙烷 (TriAE) 是一类增值化学品,最好从生物质衍生糖类中提取。然而,高效、选择性地破坏己糖中的C-C键合成TriAE一直是一个巨大的挑战。在这项研究中,制备了一系列磷钨酸 (HPW) 金属盐来催化几种生物质衍生的糖。Cs x H 3− x PW 12 O 40 ( x= 1-3), 反应温度和反应时间被突出显示。还研究了不同生物质来源的糖(葡萄糖、果糖、甘露糖、纤维素二糖和纤维素)和不同醇(甲醇、乙醇、1-丙醇、2-丙醇和 1-丁醇)的影响。结果发现,HPW的碱金属和碱土金属单氢盐是有效的催化剂,金属元素的碱性越强,催化活性越高。Cs 2 HPW 在催化葡萄糖转化为 TriAE 方面表现出最佳活性在甲醇和乙醇中反应时,[2 + 4]逆醛醇缩合,1,1,2-三甲氧基乙烷和1,1,2-三乙氧基乙烷的产率分别高达88.44%和72.56%。催化剂失活是由于活性位点上的焦