Asymmetric hydrogenation
Iridium‐Catalyzed Asymmetric Hydrogenation of N‐Alkyl α‐Aryl Furan‐Containing Imines: an Efficient Route to Unnatural N‐Alkyl Arylalanines and Related Derivatives.
... Catalyzed Asymmetric Hydrogenation of N Alkyl α Aryl Furan Containing ‐ ‐ ‐ ‐ Imines: an Efficient Route to Unnatural N Alkyl Arylalanines and Related ...
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Development of catalysts for asymmetric hydrogenation
... substitution and application to asymmetric hydrogenation of ketones. Within the Wills group there have been many studies into the development of polymer supports for tethered ruthenium catalysts in order to ...
339
Phosphoramidite-Controlled Asymmetric Hydrogenation with Rhodium Catalysts54-63
... A protocol has been designed for the parallel synthesis of ligand libraries in 96 well plates. A dis- crete ligand is prepared in each individual well. Key to the process is the removal of the chloride ions, as these can ...
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New ruthenium catalysts for asymmetric hydrogenation
... homogeneous asymmetric catalysis can be an applicable process for industry and in recent years the industrial application of enantioselective homogeneous catalysis has made slow but significant ...are ...
159
Application of tethered ruthenium catalysts to asymmetric hydrogenation of ketones, and the selective Hydrogenation of aldehydes
... the asymmetric hydrogenation of ketones was investigated (Scheme 1, Figure 1, Table ...to hydrogenation would have the advantage of eliminating the requirement to preform, or form in situ,, either ...
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Asymmetric ruthenium tricarbonyl cyclopentadienone complexes ; synthesis and application to asymmetric hydrogenation of ketones
... complexes which are readily isolated and purified, and all were char- acterised by NMR, HRMS and X-ray crystallography. All of the com- plexes proved to be highly effective in the asymmetric hydrogenation ...
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Applications of tethered asymmetric hydrogenation catalysts
... of asymmetric induction they produce; as measured by the ee or er of the final ...lower asymmetric induction but otherwise superior properties, on the basis that the enantiopurity of the final product can ...
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Mechanistic studies of the hydrogenation of imino bonds
... The introduction has described the methodology developed for the asymmetric hydrogenation of imines with particular focus on metal catalysed, organocatalysed and the subsequent advance to cooperative ...
173
Asymmetric transfer hydrogenation reductions using tethered ruthenium (II) catalysts
... application of N‟-alkylated derivatives of N-tosyl-1,2-diaminocyclohexane (TsDAC) to ketone and imine ATH has been reported. 28d, 28e Although oxygen-containing chains has not been previously studied, one report on the ...
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Ruthenium-Catalysed Asymmetric Reduction of Ketones158-165
... the asymmetric hydrogenation of a wide range of unfunctionalised ketones now became possible, without the previous need to have a secondary binding group on the ...
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Tethered Ru(II) catalysts containing a Ru–I bond
... hydrogenation (ATH) using reagents such as isopropanol, formic acid or aqueous sodium formate, 2,3 they have also proven to be capable of catalysing reductions using hydrogen gas, i.e. asymmetric ...
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Ir(III) complexes of diamine ligands for asymmetric ketone hydrogenation
... Each of the ligands was employed in the asymmetric hydrogenation of 2-methylacetophenone, using the conditions previously reported for the reduction. 15 The results are summarized in Table 1. ...
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The Use of Platinum Metal Complexes in Asymmetric Catalysis137-144
... Chiral chelating biphosphines have played a key role in these advances, which have led to: asymmetric hydrogenation as a route to amino-acids and Vitamin E precursors, kinetic[r] ...
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Novel Chiral Chemistries Japan 2009203-208
... Higher reaction rates and enantioselectivities can be observed when two different monodentate lig- ands are used at the same time. This has resulted in an economical process for the preparation of part of Novartis’ renin ...
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Synthesis of D-pantolactone via Combined a Novel Organocatalyst Catalyzed Asymmetric Aldol Reaction and Hydrogenation Catalyzed by Cu-/SiO2
... asymmetric hydrogenation reaction. Under the optimized condition of asymmetric hydrogenation for precursor-(D) -3- formyl -2- hydroxy -3- ethyl butyrate to obtain D-pantolactone with purity ...
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Ether tethered Ru(ii)/TsDPEN complexes : synthesis and applications to asymmetric transfer hydrogenation
... diamine ligand with a Ru(II) arene unit. 2-7 These catalysts may be employed in both asymmetric transfer hydrogenation (ATH) 3 reactions, i.e. using an organic compound as the hydrogen source, or direct ...
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Subject Index to Volume 40203-208
... Styrene, asymmetric hydroformylation, a 43,44 hydrogenation, with a Pd sheet electrode, a. substituted, liquid-phasc hydroformylation,[r] ...
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Application of proline functionalised 1,2 diphenylethane 1,2 diamine (DPEN) in asymmetric transfer hydrogenation of ketones
... Four ligands have been developed for the asymmetric transfer hydrogenations of ketones. These ligands show a good level of activity when the reaction is performed in water with sodium formate as the hydrogen ...
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Recent developments in the area of asymmetric transfer hydrogenation
... In order to test this we examined the transfer hydrogenation of a 1:1 mixture of propiophenone (which is known to be a good substrate) and α-methoxyacetophenone. In the event neither ketone was reduced, thus ...
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Application of ruthenium complexes of triazole containing tridentate ligands to asymmetric transfer hydrogenation of ketones
... (3) (a) Wills, M. in Modern Reduction Methods, ed. Andersson, P. G.; Munslow, I. J. Wiley-VCH, Weinheim, 2008, Chapter 11, pp 271- 296. (b) Uematsu, U.; Fujii, A.; Hashiguchi, S.; Ikariya, T.; Noyori, R. J. Am. Chem. ...
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