Nb(V) compounds as epoxides carboxylation catalysts: the role of the solvent

The synthesis of organic cyclic carbonates from epoxides and CO2 is described. The role of the solvent is discussed, together with that of Nb(V) catalysts (Nb2O5 and NbCl5). The reaction is very selective and affords the conversion of epoxides into the relevant carbonates in high yield. © 2003 Elsevier Science B.V. All rights reserved.