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A Ruthenium(II) Complex with a <i>C</i><sub>2</sub>-Symmetric Diphosphine/Diamine Tetradentate Ligand for Asymmetric Transfer Hydrogenation of Aromatic Ketones
Organometallics · 1996 · Vol. 15(4) · pp. 1087–1089
Abstract
The trans-RuIICl2 complexes with structurally similar N,N‘-bis[o-(diphenylphosphino)benzylidene]cyclohexane-1,2-diamine and N,N‘-bis[o-(diphenylphosphino)benzyl]cyclohexane-1,2-diamine ligands have been synthesized, and their molecular structures have been determined. The C2-symmetric diphosphine/diamine-based Ru complex acts as an excellent catalyst precursor in asymmetric transfer hydrogenation of acetophenone in a 0.1 M 2-propanol solution, leading to 2-phenylethanol in 97% ee and in 93% yield after 7 h at 45 °C. This transfer hydrogenation is characterized by low reversibility under these conditions.
Asymmetric Hydrogenation and CatalysisSynthesis and Catalytic ReactionsCarbon dioxide utilization in catalysisChemistryRutheniumTransfer hydrogenationDiamineLigand (biochemistry)Transfer (computing)Medicinal chemistryPolymer chemistryPhotochemistryOrganic chemistry
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