The new chiral diphosphineligand [(5,6), (5′,6′)-bis(1,2-ethylenedioxy)biphenyl-2,2′-diyl]bis(diphenylphosphine) (BisbenzodioxanPhos) has been successfully prepared and used in ruthenium-catalyzed asymmetric hydrogenation of 2-(6′-methoxy-2′-naphthyl)propenoic acid and β-keto esters with high enantioselectivity (92.2% and up to 99.5% ee, respectively).
SYNPHOS: a New Atropisomeric Diphosphine Ligand. From Laboratory-scale Synthesis to Scale-up Development
作者:Sébastien Duprat de Paule、Séverine Jeulin、Virginie Ratovelomanana-Vidal、Jean-Pierre Genêt、Nicolas Champion、Gilles Deschaux、Philippe Dellis
DOI:10.1021/op034016w
日期:2003.5.1
A new optically active diphosphine ligand, [(5,6),(5',6')-bis(ethlenedioxy)biphenyl-2,2'-diyl]bis(diphenylphosphine) (SYNPHOS) has been synthesized. Laboratory-scale synthesis and scale-up development of this ligand are described herein. This new atropisomeric diphosphine was also used in ruthenium-catalyzed asymmetric hydrogenation.