82637-15-8Relevant articles and documents
Zirconium complexes having a chiral phosphanylamide in the co-ordination sphere
Wiecko, Michal,Girnt, Denise,Rastaetter, Marcus,Panda, Tarun K.,Roesky, Peter W.
, p. 2147 - 2150 (2005)
The chiral phosphanylamido ligand, {N(CHMePh)(PPh2)} -, has been introduced into co-ordination chemistry. As starting material the oily amines HN(R-*CHMePh)(PPh2) (1a) and HN(S-*CHMePh)(PPh2) (1b) were used. To
Asymmetric Transfer Hydrogenation in Thermomorphic Microemulsions Based on Ionic Liquids
Hejazifar, Mahtab,Pálv?lgyi, ádám Márk,Bitai, Jacqueline,Lanaridi, Olga,Bica-Schr?der, Katharina
, p. 1841 - 1851 (2019/10/11)
A thermomorphic ionic-liquid-based microemulsion system was successfully applied for the Ru-catalyzed asymmetric transfer hydrogenation of ketones. On the basis of the temperature-dependent multiphase behavior of the targeted microemulsion, simple product separation as well as catalyst recycling could be realized. The use of water-soluble ligands improved the immobilization of the catalyst in the microemulsion phase and significantly decreased the catalyst leaching into the organic layer upon extraction of the product. Eventually, the optimized microemulsion system could be applied to a wide range of aromatic ketones that were reduced with good isolated yields (up to 98%) and enantioselectivities (up to 97%), while aliphatic ketones were less successful.
A New Phosphine-Amine-Oxazoline Ligand for Ru-Catalyzed Asymmetric Hydrogenation of N-Phosphinylimines
Ma, Xiaochen,Qiao, Lin,Liu, Guixia,Huang, Zheng
supporting information, p. 1151 - 1155 (2018/10/15)
A series of chiral phosphine-amine-oxazoline (PAO) ligands with an NH moiety were synthesized and applied to the ruthenium-catalyzed asymmetric hydrogenation of N-phosphinylimines. The ligand bearing phenyl groups at the phosphorus moiety and isopropyl at the oxazoline moiety exhibits good activity and excellent enantioselectivity (up to 99% ee). This catalytic system provides an efficient and mild approach to access enantioriched amines.