Conversions between metal–ligand multiple bond (MLMB) types: carbonyl olefination and other applications

Abstract

In this Perspective, methods for the direct conversion of one type of metal–ligand multiple bond (MLMB) to another are discussed. Of particular interest, because of their potential utility in organic synthesis, are examples of direct conversion of N- and O-based MLMB to alkylidenes and alkylidynes. Recent efforts in this area from our laboratory with some background are detailed. The research from our group involves metallacycles prepared directly from an imido ligand where a metal–carbon bond can have alkylidene-like or alkyl-like properties and reactivity depending on the ancillary ligands.