Role of ancillary ligands in selectivity towards acceptorless dehydrogenation <i>versus</i> dehydrogenative coupling of alcohols and amines catalyzed by cationic ruthenium(<scp>ii</scp>)–CNC pincer complexes
Rahul Kumar Singh, Dibya Yadav, Shilpi Misra, Amrendra K. Singh
Abstract
and DMSO ligands performed better compared to complexes containing CO and COD ligands. Based on NMR and mass investigation of catalytic reactions, a plausible mechanism has been suggested to explain the difference in catalytic activity and its reversal during the dehydrogenative coupling reaction. Furthermore, the substrate scope for the dehydrogenative coupling reaction of benzyl alcohol with a wide range of amines has been explored, including synthesizing some pharmaceutically important imines. All new complexes have been characterized by various spectroscopic techniques, and the structures of 4b and 6b have been confirmed by the single-crystal X-ray diffraction technique.
Topics & Concepts
Pincer movementChemistryDehydrogenationCatalysisRutheniumCationic polymerizationPyridineMedicinal chemistryPincer ligandAlcoholSelectivityTransfer hydrogenationPhotochemistryOrganic chemistryAsymmetric Hydrogenation and CatalysisCarbon dioxide utilization in catalysisOrganometallic Complex Synthesis and Catalysis