Sustainable Synthesis of Cyclic Carbonates from Terminal Epoxides by a Highly Efficient CaI₂/1,3-Bis[tris(hydroxymethyl)-methylamino]-propane Catalyst.

Metal iodide such as CuI with strong complexation properties shows poorer activity, indicating that the presence of free nucleophilic iodide may be significant for promoting the cyclic carbonate formation (entry 19).

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