Rhodium(I) bisaldimine complexes in transfer hydrogenation |
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Authors: | L O Nindakova N M Badyrova E Kh Sadykov I A Ushakov S Ch Vanzarakshaeva |
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Institution: | 1.Irkutsk National Research Technical University,Irkutsk,Russia;2.Favorskii Irkutsk Institute of Chemistry, Siberian Branch,Russian Academy of Sciences,Irkutsk,Russia |
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Abstract: | The reactions of hydrogen transfer from 2-propanol on acetophenone in the presence of the system Rh(cod)Cl]2–L] (L is bisaldimine ligands based on (R,R)-1,2-cyclohexanediimine and pyridine-, quinoline-, and thiophenecarboxaldehyde) were studied. Rhodium(I) complexes with optically active ligand showed a high catalytic activity (up to 345 h–1) and moderate enantioselectivity up to 55% ee of (R)-1-phenyethanol]. The structure of rhodium complex with N,N'-(1R,2R)-cyclohexane-1,2-diyl-bis1-(pyridine-2-yl)methanimine] was determined on the basis of the data of 1H and 13C NMR spectroscopy and quantum chemical calculations. |
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