An efficient protocol is described for producing cyclic carbonates in good to excellent yields under moderate reaction conditions (100.0 °C, 1.0 MPa) by treating epoxides with carbon dioxide, promoted by a series of azolate ionic liquids, which are effective recyclable metal-free and halide-free catalysts.
Goodrich, P., Gunaratne, H. Q. N., Jacquemin, J., Jin, L., Lei, Y., & Seddon, K. R. (2017). Sustainable cyclic carbonate production, utilising carbon dioxide and azolate ionic liquids. ACS Sustainable Chemistry & Engineering. https://doi.org/10.1021/acssuschemeng.7b00355