Catalytic Ionic Hydrogenation of Ketones by {[Cp*Ru(CO)2]2(µ-H)}+
{l_brace}[Cp*Ru(CO){sub 2}]{sub 2}({mu}-H){r_brace}{sup +}OTf{sup -} functions as a homogeneous catalyst precursor for hydrogenation of ketones to alcohols, with hydrogenations at 1 mol % catalyst loading at 90 C under H{sub 2} (820 psi) proceeding to completion and providing >90% yields. Hydrogenation of methyl levulinate generates {gamma}-valerolactone, presumably by ring-closing of the initially formed alcohol with the methyl ester. Experiments in neat Et{sub 2}C=O show that the catalyst loading can be <0.1 mol % and that at least 1200 turnovers of the catalyst can be obtained. These reactions are proposed to proceed by an ionic hydrogenation pathway, with the highly acidic dihydrogen complex [Cp*Ru(CO){sub 2}({eta}{sup 2}-H{sub 2})]{sup +}OTf{sup -} being formed under the reaction conditions from reaction of H2 with {l_brace}[Cp*Ru(CO){sub 2}]{sub 2}({mu}-H){r_brace}{sup +}OTf{sup -}.
- Research Organization:
- BROOKHAVEN NATIONAL LABORATORY (BNL)
- Sponsoring Organization:
- USDOE SC OFFICE OF SCIENCE (SC)
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 1040335
- Report Number(s):
- BNL--90714-2010-JA; KC0201010
- Journal Information:
- Organometallics, Journal Name: Organometallics Journal Issue: 4 Vol. 29; ISSN ORGND7; ISSN 0276-7333
- Country of Publication:
- United States
- Language:
- English
Similar Records
Synthesis of Ruthenium Carbonyl Complexes with Phosphine or Substituted Cp Ligands, and Their Activity in the Catalytic Deoxygenation of 1,2-Propanediol
Synthesis and Some Reactions of the Heterometallic C[subscript 7] Complex {Cp*(dppe)Ru}CCCCCCC{Co[subscript 3]([mu]-dppm)(CO)[subscript 7]}