Efficient conversion of fructose to 5-hydroxymethylfurfural (HMF) is a key step for producing fuels and value-added chemicals from carbohydrates. Here, we report for the first time the applicability of phosphate-functionalized porous organic polymers (POPs) as a catalyst for fructose conversion. Two catalysts, B-POP and P-POP, were synthesized via a simple one-pot reaction and B-POP showed high surface area (1193 m² g^-1) and high mesoporosity (54.7%) with 1.7 mmol·g^-1 of phosphate groups available as surface acid sites. The catalytic activity of the phosphate functionalized POPs was investigated using different solvents, and B-POP yielded 100% fructose conversion with 85% HMF selectivity within 30 min (equivalent to a turnover frequency of 32.2 h^-1, the highest activity among other previously reported acid-based heterogeneous catalysts) when DMSO/1,4-dioxane dual solvent medium was used at 130 °C. These results suggested that phosphate group-functionalized POPs can be promising heterogeneous catalysts for producing biobased platform chemicals from renewable resources.

果糖高效转化为5-羟甲基糠醛（HMF）是从碳水化合物生产燃料和增值化学品的关键步骤。在这里，我们首次报道了磷酸酯官能化的多孔有机聚合物（POPs）作为果糖转化催化剂的适用性。通过简单的一锅法反应合成了两种催化剂B-POP和P-POP，B-POP显示出高表面积（1193 m ²  g ^-1）和高介孔率（54.7％），为1.7 mmol·g ^-1可用的磷酸基团作为表面酸性位点。使用不同的溶剂研究了磷酸盐官能化的POPs的催化活性，B-POP在30分钟内产生了100％的果糖转化率和85％的HMF选择性（相当于32.2 h的周转频率）当在130°C下使用DMSO / 1,4-二恶烷双溶剂介质时，^-1（在其他先前报道的基于酸的非均相催化剂中具有最高活性）。这些结果表明，磷酸酯基团官能化的POPs可能是有前途的异构催化剂，用于从可再生资源生产生物基平台化学品。