ChemInform Abstract: NMR Investigations on Chiral Catalyst Complexes. Part 4. Asymmetric Hydrogenation of Dimethyl Itaconate Catalyzed by Rhodium Chelates of Aminophosphine Phosphinites: A Kinetic and NMR Spectroscopical Study.
✍ Scribed by D. HELLER; R. KADYROV; M. MICHALIK; T. FREIER; U. SCHMIDT; H. W. KRAUSE
- Publisher
- John Wiley and Sons
- Year
- 2010
- Weight
- 29 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0931-7597
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✦ Synopsis
NMR Investigations on Chiral Catalyst Complexes. Part 4. Asymmetric Hydrogenation of Dimethyl Itaconate Catalyzed by Rhodium Chelates of Aminophosphine Phosphinites: A Kinetic and NMR Spectroscopical Study.
-The asymmetric hydrogenation in the presence of Rh(I) complexes with aminophosphine phosphinites of type (I) can be described by the Michaelis-Menten kinetics. Variation of the nitrogen substituent is found to cause a change in the concentration of catalyst-substrate complexes. In the case of the phosphinite (Ic) the concentration is especially high, and thus, it is possible to study its 13P NMR spectra. Signals of three catalyst-substrate complexes are found.