diphosphane 17, was performed starting from (R)-camphor. The new diphosphanes were used as ligands in the enantioselective rhodium(I)-catalyzed hydrogenation of functionalized olefins − α- and β-dehydroamino acids and their esters − in order to elucidate the effect of the oxo- and oxy-functional groups. The enantioselectivities, ranging from 2−90% ee, and the rates were strongly dependent on the type and relative
[DE] HYDROXYDIPHOSPHINE UND DEREN VERWENDUNG IN DER KATALYSE<br/>[EN] HYDROXY DIPHOSPHINES AND THEIR USE IN CATALYSIS<br/>[FR] HYDROXYDIPHOSPHINES ET LEUR UTILISATION EN CATALYSE
申请人:DEGUSSA
公开号:WO2003099832A1
公开(公告)日:2003-12-04
Die Erfindung betrifft neue unsymmetrische chirale Hydroxydiphosphine und deren Derivate der allgemeinen Formel (I), sowie deren Verwendung als Katalysatoren, insbesondere für enantioselektive Synthesen.
A new hydroxydiphosphine as a ligand for Rh(I)-catalyzed enantioselective hydrogenation
作者:Igor V. Komarov、Axel Monsees、Renat Kadyrov、Christine Fischer、Ute Schmidt、Armin Börner
DOI:10.1016/s0957-4166(02)00372-5
日期:2002.8
A new diphosphine ligand bearing a hydroxy group in the backbone was synthesized starting from 9-bromocamphor. The rhodium(I) complex based on this ligand was tested in the hydrogenation of alpha- and beta-amino acid precursors. The activity and selectivity of the catalyst were found to be strongly dependent upon the nature of the substrate. Thus. beta-acetylamino carboxylates were obtained with up to 97% ee. (C) 2002 Published by Elsevier Science Ltd.
Cycloolefin Phosphine Ligands and Their Use in Catalysis
申请人:Kadyrov Renat
公开号:US20080306264A1
公开(公告)日:2008-12-11
The present invention concerns novel bidentante optionally N-containing P-ligands of general Formula (I) embracing a two-ring-system and processes for synthesizing them, transition metal complexes of these compounds and their use as catalysts.