Hydroxy-Substituted Pyridine-Like N-Heterocycles: Versatile Ligands in Organometallic Catalysis

Bio-inspired complexes with hydroxy-substituted pyridine-like N-heterocyclic ligands have been applied in homogeneous catalysis, especially in transformations related to hydrogen storage. The hydroxy functional group has a significant effect on catalyst activation by acting as an electron donor and/or pendent base. This article presents the design and synthesis of new complexes with pyridine-like N-heterocyclic ligands bearing versatile hydroxy functional groups. Their application for the activation of small molecules such as H2, CO2, and alcohols and their potential contribution to the hydrogen economy are highlighted.