Ruthenium xantphos complexes in hydrogen transfer processes: reactivity and mechanistic studies.
Ruthenium xantphos complexes in hydrogen transfer processes: reactivity and mechanistic studies.
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DOI：
10.1039/b813543f
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发表时间：
2009-01
影响因子：
4
通讯作者：
Araminta E. W. Ledger;Paul A. Slatford;J. Lowe;M. Mahon;M. Whittlesey;Jonathan M. J. Williams
中科院分区：
文献类型：
--
作者：
Araminta E. W. Ledger;Paul A. Slatford;J. Lowe;M. Mahon;M. Whittlesey;Jonathan M. J. Williams
The in situ combination of [Ru(PPh3)3(CO)H2] with xantphos is catalytically active for the alkylation of alcohols with the ketonitrile (t)BuC(O)CH2CN in a model oxidation-Knoevenagel-reduction process. The precursor complex [Ru(xantphos)(PPh3)(CO)H2] was isolated and reacted with stoichiometric amounts of PhCH2OH and PhCHO. Under these conditions, the alcohol is decarbonylated to afford [Ru(xantphos)(CO)2H2] 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)H2], which is catalytically inactive for the Knoevenagel reaction and fails to show any stoichiometric reactivity with alcohols.
