Modular N,O‐Chelating Ligands: Group‐4 Amidate Complexes for Catalytic Hydroamination

Amidate ligands have been used as a modular ligand set for early transition‐metal complexes, and have been found to exhibit high reactivity in the catalytic hydroamination of alkynes, allenes, and alkenes. This microreview focuses on coordination metal complexes containing amidate functionality including their bonding, structure and reactivity trends. The synthesis and characterization of a number of different group‐4 metal complexes is presented, and their applications in both hydroamination and organic synthesis are discussed.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)