Ring-opening of non-activated aziridines with [ 11 C]CO 2 via novel ionic liquids.

Novel ionic liquids based on DBU and DBN halide salts were developed as a catalytic system for ring-opening of non-activated aziridines with [ 11 C]CO 2 . The ability of ionic liquids to activate aziridines represents a simple methodology for the synthesis of 11 C-carbamates and can be extended for CO 2 -fixation in organic and radiochemistry.