CO2 Cycloaddition Reactions Catalyzed by an Ionic Liquid Grafted onto a Highly Cross‐Linked Polymer Matrix

A support group for ionic liquids: 3-Butyl-1-vinylimidazolium chloride supported covalently on a polymer cross-linked with divinylbenzene gives rise to a very active, stable, and selective heterogeneous catalyst 1 for the addition of CO2 to epoxides (see scheme). Moreover, the catalyst can be easily separated from the products and reused.