Synthesis of cyclic carbonates from CO2 and epoxides catalyzed by low loadings of benzyl bromide/DMF at ambient pressure

Abstract

An efficient, metal-free catalytic system for the conversion of CO₂ and epoxides to cyclic carbonates under mild conditions with good-to-excellent yields (57–99%) was developed. A possible reaction mechanism involving the electrophilic activation of epoxides by benzyl cations and nucleophilic activation of CO₂ by DMF is proposed.