Renewable‐based furan compounds derived from 2‐formyl‐5‐(hydroxymethyl)furan (5‐HMF) are successfully employed as catalysts to synthesize cyclic organic carbonates through the reaction of carbon dioxide with epoxides. The effects of temperature, reaction time, reagent ratios, and carbon dioxide pressure are optimized before evaluating various bio‐based complexing agents in combination with different alkali metal halide salts. Among them, 2,5‐bis(hydroxymethyl)tetrahydrofuran (BHTHF) shows the highest efficiency as a complexing agent when paired with sodium bromide (NaBr), enabling the production of industrially relevant cyclic carbonates in high yields (12 examples, achieving 94–99% epoxide conversion and 70–99% carbonate selectivity) under mild pressure conditions (carbon dioxide pressure of 1–10 bar, reaction time of 6 h, and temperature of 120 °C). Additionally, the BHTHF/NaBr catalytic system demonstrates high stability, maintaining its performance over nine consecutive epoxide additions (8 mmol each) without any loss of efficiency.

中文翻译：

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2-甲酰基-5-（羟甲基）呋喃 （HMF） 衍生物作为 CO2 插入反应的活性络合剂


源自 2-甲酰基-5-（羟甲基）呋喃 （5-HMF） 的可再生呋喃化合物已成功用作催化剂，通过二氧化碳与环氧化物反应合成环状有机碳酸盐。在评估各种生物基络合剂与不同碱金属卤盐的组合之前，优化温度、反应时间、试剂比例和二氧化碳压力的影响。其中，2,5-双（羟甲基）四氢呋喃 （BHTHF） 在与溴化钠 （NaBr） 配对时显示出最高的络合剂效率，能够在温和压力条件下（二氧化碳压力为 1-10 bar，反应时间为 6 小时， 和 120 °C 的温度）。此外，BHTHF/NaBr 催化系统表现出高稳定性，在连续添加 9 次环氧化物（每次 8 mmol）时保持其性能，而不会降低任何效率。