Ruthenium xantphos complexes in hydrogen transfer processes: reactivity and mechanistic studies
Ledger, A. E. W., Slatford, P. A., Lowe, J. P., Mahon, M. F., Whittlesey, M. K. and Williams, J. M. J., 2009. Ruthenium xantphos complexes in hydrogen transfer processes: reactivity and mechanistic studies. Dalton Transactions, 4, pp. 716-722.
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The in situ combination of [Ru(PPh3)(3)(CO)H-2] with xantphos is catalytically active for the alkylation of alcohols with the ketonitrile (BuC)-Bu-t(O)CH2CN in a model oxidation-Knoevenagel-reduction process. The precursor complex [Ru(xantphos)(PPh3)(CO)H-2] was isolated and reacted with stoichiometric amounts of PhCH2OH and PhCHO. Under these conditions, the alcohol is decarbonylated to afford [Ru(xantphos)(CO)(2)H-2] and finally [Ru(xantphos)(CO)(3)], both of which prove to be less active for catalysis than the starting complex. The reactivity of the xantphos system contrasts with that of [Ru(dppp)(PPh3)(CO)H-2], which is catalytically inactive for the Knoevenagel reaction and fails to show any stoichiometric reactivity with alcohols.
|Creators||Ledger, A. E. W., Slatford, P. A., Lowe, J. P., Mahon, M. F., Whittlesey, M. K. and Williams, J. M. J.|
|Departments||Faculty of Science > Chemistry|
|Additional Information||ID number: 000262398600016|
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