Reaction of Cyclocarbonates with Amines as an Alternative Route to Polyurethanes: A Quantum-Chemical Study of Reaction Mechanism

摘要

The common method of preparation of polyurethanes is based on the reaction of terminal groups of hydroxy-containing oligomers with di- or polyisocy-anates [1]. Isocyanates are rather toxic compounds and their preparation with the use of phosgene is not so immaculate in environmental context [2]. Among few reactions that can be used for designing non-isocyanate polyurethanes, the reaction of cyclocarbonates with primary amines seems to be rather promising. Oligomers with cyclocarbonate groups are obtained from epoxide or hydroxy-containing precursors [3], and the reaction of cyclocarbonate groups with amines leads to hydroxyurethanes.