The Library
Iron and ruthenium catalysts for hydrogen transfer reactions
Tools
Tools
Tools
Johnson, Tarn C. (2012) Iron and ruthenium catalysts for hydrogen transfer reactions. PhD thesis, University of Warwick.
|
Text
WRAP_THESIS_Johnson_2012.pdf - Submitted Version Download (5Mb) | Preview |
Official URL: http://webcat.warwick.ac.uk/record=b2582820~S1
Abstract
The ruthenium catalysed oxidation of 1-phenylethanol derivatives with the release of hydrogen gas has been studied. A hydrogen acceptor was introduced in an effort to elucidate the rate-determining step of the reaction. The transfer of hydrogen from complex alcohols to simple aldehydes and ketones was pursued as a process for obtaining simple alcohols for fuel cell applications. The Shvo catalyst was identified as being the most efficient catalyst for the oxidation of difficult substrates. A family of iron analogues of the Shvo catalyst were synthesised and studied as precatalysts for the oxidation of alcohols. Catalyst activation was achieved by the removal of a CO ligand using trimethylamine-N-oxide and the oxidation of 1-phenylethanol derivatives with acetone was studied. Simple aldehydes were evaluated as hydrogen acceptors and a novel formylation reaction was discovered. Asymmetric iron analogues of the Shvo catalyst were synthesised and applied to the asymmetric transfer hydrogenation of acetophenone using 5:2 formic acid/triethylamine. The synthesis of further analogues with a tethering group was investigated to improve catalyst stability and enantioselectivity. Novel chiral diamine and amino-alcohol ligands containing 1,2,3-triazole functionalities were developed as ligands for the asymmetric transfer hydrogenation of ketones. Tridentate diaminotriazoles provided the best activity and selectivity in the reduction reactions with Ru3(CO)12.
| Item Type: | Thesis or Dissertation (PhD) |
|---|---|
| Subjects: | Q Science > QD Chemistry |
| Library of Congress Subject Headings (LCSH): | Iron catalysts, Ruthenium, Catalysts, Oxidation |
| Date: | May 2012 |
| Institution: | University of Warwick |
| Theses Department: | Department of Chemistry |
| Thesis Type: | PhD |
| Publication Status: | Unpublished |
| Supervisor(s)/Advisor: | Wills, Martin |
| Sponsors: | Engineering and Physical Sciences Research Council (EPSRC) |
| Extent: | viii, 236 leaves : ill., charts |
| Language: | eng |
| URI: | http://wrap.warwick.ac.uk/id/eprint/50062 |
Actions (login required)
 |
View Item |
