Abstract
The activation of carbon dioxide has been obtained in O 2/CO 2 saturated ionic liquids, via electrochemically generated O 2 −, at a less negative potential than the one of the direct cathodic reduction of CO 2. This electrochemical activation has been applied to the C–N bond formation from amines and carbon dioxide in the synthesis of organic carbamates. A competitive reaction between electrogenerated superoxide ion and imidazolium cations yielding 2-imidazolones has been pointed out. This procedure allows to avoid the utilization of volatile and toxic organic solvents, supporting electrolytes and catalysts.
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