Chiral ligands and their transition metal complexes
申请人:Scholz Ulrich
公开号:US20070066825A1
公开(公告)日:2007-03-22
The present invention relates to chiral phosphorus compounds and their transition metal complexes, and also to the use of these transition metal complexes, especially in asymmetric syntheses.
<i>t</i>-BuOK-Mediated Hydrophosphination of Functionalized Alkenes: A Novel Synthesis of Chiral P,N- and P,P-Ligands
作者:Tanasri Bunlaksananusorn、Paul Knochel
DOI:10.1021/jo030383u
日期:2004.7.1
A novel synthesis of effective chiral P,N- and P,P-ligands has been developed by using a t-BuOK-mediated hydrophosphination of chiral alkenylpyridines and alkenylphosphine oxides. Ir complexes of chiral P,N-ligrands 1 and 3 gave high enantioselectivities for the hydrogenation of (Z)-alpha(acetamido)cinnamate 25 and (E)-1,2-diphenylpropene leading to the hydrogenated products with up to 97% ee.
[DE] CHIRALE LIGANDEN UND DEREN ÜBERGANGSMETALLKOMPLEXE<br/>[EN] CHIRAL LIGANDS AND THEIR TRANSITION METAL COMPLEXES<br/>[FR] LIGANDS CHIRAUX ET LEURS COMPLEXES DE METAUX DE TRANSITION
申请人:BAYER CHEMICALS AG
公开号:WO2004104014A3
公开(公告)日:2005-03-17
New Applications of Camphor-Derived P,N-Ligands for Asymmetric Pd- and Ir-Catalyzed Reactions
作者:Martine Bonin、Laurent Micouin、Paul Knochel、Tanasri Bunlaksananusorn、Alejandro Pérez Luna
DOI:10.1055/s-2003-42067
日期:——
Ir-catalyzedasymmetric hydroboration of bicyclic hydrazine 4 in the presence of chiral ligand la, leads to bicyclic alcohol 5 after oxidative workup in good yield (76%) and moderate enantioselectivity (71 % ee).