6-, 7- and 8-membered ring cyclic carbonates are of particular interest as monomers for ring-opening polymerisation towards more sustainable polymers. They are traditionally synthesised from diols and phosgene derivatives, and while alternative CO₂ methods exist to make 5- and 6-membered cyclic carbonates, there is no report of the synthesis of 7- and 8-membered cyclic carbonates made directly from CO₂. Herein we report an efficient one-pot synthesis of cyclic carbonates which uses diols, CO₂, tosyl chloride and mild bases (NEt₃ or TMP), under ambient temperature and 1 atm of CO₂ pressure. Fifteen cyclic carbonates were synthesised, including twelve known monomers, and the first examples of 7- and 8-membered cyclic carbonates made using CO₂.

作为开环聚合向更可持续的聚合物的单体，6-元，7元和8元环环状碳酸酯特别受关注。它们传统上是由二醇和光气衍生物合成的，尽管存在替代的CO ₂方法可制备5和6元环状碳酸酯，但尚无直接由CO ₂合成7和8元环状碳酸酯的报道。本文我们报告的环状碳酸酯的有效的一锅法合成，它使用的二醇，CO ₂，甲苯磺酰氯和弱碱（NET ₃或TMP），环境温度下，1个大气压的CO ₂压力。合成了十五种环状碳酸酯，包括十二种已知的单体，以及使用CO ₂制备的7元和8元环状碳酸酯的第一个实例。