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RESEARCH PRODUCT
Optically Active Titanium Complexes Containing Linked Amido‐cyclopentadienyl Ligands: Their Use as Asymmetric Hydrogenation Catalysts
Sabine VerchRainer StürmerThomas P. SpaniolJun Okudasubject
LigandAsymmetric hydrogenationchemistry.chemical_elementCatalysisInorganic ChemistryMetalchemistry.chemical_compoundchemistryCyclopentadienyl complexvisual_artPolymer chemistryvisual_art.visual_art_mediumMoietyPhenyl groupTitaniumdescription
Optically active titanium complexes of the formula Ti(η5:η1−C5R4SiMe2NCHMePh)Cl2 (R = H, Me), containing the cyclopentadienyl ligand linked to a chiral 1-phenylethylamido moiety, were synthesized and characterized in both enantiomerically pure forms. A single-crystal X-ray structural analysis of (S)()Ti(η5:η1−C5H4SiMe2NCHMePh)Cl2 shows a conformation in which the phenyl group is turned away from the metal center. NOE measurements suggest that a related structure is retained in solution. Upon activation with n-butyllithium, these complexes show hydrogenation activity toward imines with slight enantioselectivity.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1996-12-01 | Chemische Berichte |