Synthesis of Cyclic Carbonates from Epoxides and Carbon Dioxide by Using Bifunctional One-Component Phosphorus-Based Organocatalysts
作者:Hendrik Büttner、Johannes Steinbauer、Thomas Werner
DOI:10.1002/cssc.201500612
日期:2015.8.24
Numerous bifunctional organocatalysts were synthesized and tested for the atom‐efficient addition of carbon dioxide and epoxides to produce cyclic carbonates. These catalysts are based on phosphonium salts containing an alcohol moiety in the side chain for substrate activation through hydrogen bonding. In the model reaction, converting 1,2‐butylene oxide with CO2, 19 catalysts were tested to determine
合成了许多双功能有机催化剂,并测试了碳和环氧化物的原子效率加成反应,以生产环状碳酸酯。这些催化剂基于在侧链中包含醇部分的phospho盐,用于通过氢键活化底物。在模型反应中,测试了用CO 2转化1,2-环氧丁烷,19种催化剂以确定结构与活性之间的关系。总共有28种环氧化合物被CO 2转化得到相应的环状碳酸酯,产率最高可达99%。即使在45°C时,活性最高的催化剂也能够以高收率选择性地生产环状碳酸酯。在硅胶上简单过滤后,通常以分析纯的形式获得碳酸盐。这种单组分催化剂体系可在纯净和温和的反应条件下运行,并能耐受多个有用的部分。