配位子周辺部の修飾による新しい遷移金属錯体触媒の開発と触媒反応への応用

概要

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Homogeneous transition-metal catalysts are usually discrete molecules and can be synthesized by ligand design in a defined and rational way. To improve performance of homogenous catalysts, modification of catalysts is usually carried out within a close proximity of a metal center (within a few angstroms). This is effective way to develop efficient catalysts for various reactions including C-C bond-forming reactions and asymmetric reactions. Inspired by these findings, we set out to expand catalytic environment to nanosize by modification of ligands. Here the recent progress in homogeneous transition-metal catalysts with nanosize ligands is overviewed. To expand a molecular size, dendritic frameworks including flexible or rigid moieties, sterically congested m-terphenyl and its higher dendritic framework were introduced onto N-heterocyclic carbene and phosphine ligands.
2012-09-01