Chiral diphosphorus compounds and their transition metal complexes
申请人:Meseguer Benjamin
公开号:US20050080047A1
公开(公告)日:2005-04-14
The present invention relates to chiral diphosphorus compounds and their transition metal complexes, to a process for preparing chiral diphosphorus compounds and their transition metal complexes and also to their use in asymmetric syntheses.
<i>C</i><sub>2</sub>-Symmetric Diphosphinite Ligands Derived from Carbohydrates. The Strong Influence of Remote Stereocenters on Asymmetric Rhodium-Catalyzed Hydrogenation
Modular ligands of C2 symmetry (13a−e, 14a,b,d, and ent-9), systematically modified at positions 2 and 5, were easily prepared from d-glucosamine, d-glucitol, and tartaric acid, respectively. The application of these ligands in the rhodium-catalyzed hydrogenation of methyl acetamidoacrylate, methyl acetamidocinnamate, and dimethyl itaconate shows that both the configuration and the substituents at
Chirale Diphosphorverbindungen und deren Übergangsmetallkomplex
申请人:Bayer Chemicals AG
公开号:EP1400527A1
公开(公告)日:2004-03-24
Die vorliegende Erfindung betrifft chirale Diphosphorverbindungen und deren Übergangsmetallkomplexe, ein Verfahren zur Herstellung chiraler Diphosphorverbindungen und deren Übergangsmetallkomplexe sowie deren Verwendung in asymmetrischen Synthesen.