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Asymmetric transfer hydrogenation reductions using tethered ruthenium (II) catalysts

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Parekh, Vimal (2011) Asymmetric transfer hydrogenation reductions using tethered ruthenium (II) catalysts. PhD thesis, University of Warwick.

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Official URL: http://webcat.warwick.ac.uk/record=b2565419~S1

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Abstract

By asymmetric transfer hydrogenation, substituted quinolines, which are generally
regarded as challenging substrates for reduction, were successfully converted into
tetrahydroquinolines using "tethered" Ru(II) and "tethered" Rh(III) complexes in formic
acid/triethylamine.
An ether-linked "tethered" catalyst was successfully synthesized through a sequence
that avoids the use of a Birch reduction for the formation of a 1,4-cyclohexadiene
moiety. The ether link is incorporated between the basic amine of the ligand and the η6-
arene ring, giving results comparable to the alkyl-"tethered" complexes.
N-alkylated complexes containing a straight-chain substituent attached to a hydroxyl,
ether or ester function can act as effective catalysts for the reduction of ketones, and
also contains the required functionality for attachment of the catalyst to a heterogeneous
support.

Item Type: Thesis or Dissertation (PhD)
Subjects: Q Science > QD Chemistry
Library of Congress Subject Headings (LCSH): Hydrogenation, Quinoline, Ruthenium, Metal catalysts
Official Date: September 2011
Dates:
DateEvent
September 2011Submitted
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Publication Status: Unpublished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) ; Dr. Reddy's Laboratories
Extent: vii, 253 leaves : ill.
Language: eng

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