多用途な多官能基化環状カルベンPoxImの開発

抄録

Practical methods have been established for the synthesis of multifunctional N-heterocyclic carbenes (NHCs) via the introduction of substituents on either the nitrogen atom(s) or the backbone of the NHCs. However, their use has been mainly limited to acting as multidentate ligands for metal complexes. Herein, results of our recent studies on the synthesis and application of N-phosphine oxide-substituted imidazolylidenes (PoxIms) as novel type of multifunctional NHCs are discussed. PoxIms were used not only as a mono-/bi-dentate ligand for mono-/bi-metallic complexes, but also as an external stimuli-responsive Lewis base for achievement of the frustration revival strategy as well as a reagent for the direct phosphinoylation of CO₂ and carbonyl compounds. These results manifest the pioneering role of PoxIms as a multifunctional multipurpose NHC.