Remarkable 4,4′-Substituent Effects on BINAP: Highly Enantioselective Ru Catalysts for Asymmetric Hydrogenation of β-Aryl Ketoesters and Their Immobilization in Room-Temperature Ionic Liquids.

ChemInform ◽  
2004 ◽  
Vol 35 (33) ◽  
Author(s):  
Aiguo Hu ◽  
Helen L. Ngo ◽  
Wenbin Lin
Keyword(s):  
Ionic Liquids ◽  
Room Temperature ◽  
Substituent Effects ◽  
Asymmetric Hydrogenation ◽  
Room Temperature Ionic Liquids ◽  
Ru Catalysts

Ruthenium catalyzed asymmetric hydrogenation of α- and β-keto esters in ionic liquids using chiral P-Phos ligand

2005 ◽  
Vol 83 (6-7) ◽  
pp. 903-908 ◽  
Author(s):  
Kim Hung Lam ◽  
Lijin Xu ◽  
Lichun Feng ◽  
Jiwu Ruan ◽  
Qinghua Fan ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Room Temperature ◽  
Asymmetric Hydrogenation ◽  
Room Temperature Ionic Liquids ◽  
Keto Ester ◽  
Keto Esters ◽  
Simple Extraction

Chiral dipyridylphosphine ligand P-Phos was used in the Ru catalyzed asymmetric hydrogenation of α- and β-keto esters in room temperature ionic liquids (RTILs) with high conversions and good to excellent enantioselectivities. The catalyst was recycled by simple extraction and reused five times without loss of activity and enantioselectivity.Key words: ruthenium, asymmetric hydrogenation, keto ester, ionic liquids, P-Phos.

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