Easily available and inexpensive Fe^III carbamates were employed in the solvent‐free synthesis of a series of cyclic carbonates from epoxides and CO₂ at room temperature and atmospheric pressure, in the presence of a cocatalyst. Different experimental conditions (type and concentration of catalyst and cocatalyst, as well as reaction time) were investigated: Fe(O₂CNEt₂)₃ and NBu₄Br acted as the best catalyst/cocatalyst combination, allowing the formation of propylene carbonate and 1,2‐butylene carbonate with quantitative yield and selectivity in 24 h. According to NMR and DFT studies, the reaction proceeds with the dynamic trapping of carbon dioxide as a carbamato ligand.

中文翻译：

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N（N）-N，N-二烷基氨基甲酸铁（III）在环境条件下通过动态捕集二氧化碳作为氨基甲酸酯配体从CO2和环氧化物催化形成环状碳酸酯

在助催化剂存在下，在室温和大气压下，由环氧化物和CO ₂容易地获得且廉价的Fe ^III氨基甲酸酯被用于从环氧化物和CO ₂进行无溶剂合成一系列环状碳酸酯。研究了不同的实验条件（催化剂和助催化剂的类型和浓度以及反应时间）：Fe（O ₂ CNEt ₂）₃和NBu ₄ Br是最佳的催化剂/助催化剂组合，可以形成碳酸亚丙酯和1碳酸2-丁烯酯在24小时内具有定量收率和选择性。根据NMR和DFT研究，该反应通过动态捕集作为氨基甲酸酯配体的二氧化碳进行。