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Ruthenium xantphos complexes in hydrogen transfer processes: reactivity and mechanistic studies


Reference:

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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Official URL:

http://dx.doi.org/10.1039/b813543f

Abstract

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.

Details

Item Type Articles
CreatorsLedger, A. E. W., Slatford, P. A., Lowe, J. P., Mahon, M. F., Whittlesey, M. K. and Williams, J. M. J.
DOI10.1039/b813543f
DepartmentsFaculty of Science > Chemistry
RefereedYes
StatusPublished
ID Code12540
Additional InformationID number: 000262398600016

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