This review presents the recent progresses in the transition metal mediated synthetic transformations of heterocumulenes (e.g. carbon dioxide, isocyanates, carbodiimides, ketenes, etc.). Organic transformations featured include cycloadditions, nucleophilic addition, metathesis reactions, and polymerizations. Particular emphasis is placed on catalyzed reactions although in some cases, stoichiometric reactions are also described.
Keywords: isocyanates, carbodiimides, coupling, polycarbonates, epoxides, copolymerization, carboxylations
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