C1-symmetric bisphosphine ligands and their use in the asymmetric synthesis of pregabalin
申请人:Bao Jian
公开号:US20050228190A1
公开(公告)日:2005-10-13
Materials and methods for preparing (S)-(+)-3-(aminomethyl)-5-methyl-hexanoic acid and structurally related compounds via enantioselective hydrogenation of prochiral olefins are disclosed. The methods employ novel chiral catalysts, which include C
1
-symmetric bisphosphine ligands bound to transition metals.
[EN] ENANTIOMERICALLY ENRICHED AMINODIPHOSPHINES AS LIGANDS FOR THE PREPARATION OF CATALYSTS FOR ASYMMETRIC SYNTHESIS<br/>[FR] AMINODIPHOSPHINES ÉNANTIOMÉRIQUEMENT ENRICHIES COMME LIGANDS POUR LA PRÉPARATION DE CATALYSEURS POUR UNE SYNTHÈSE ASYMÉTRIQUE
申请人:ENANTIA S L
公开号:WO2011098160A1
公开(公告)日:2011-08-18
The present invention relates to enantiomerically enriched aminodiphosphine ligands where the chirality is located in the phosphorus atom and their preparation process, to catalysts containing them and their preparation process, as well as their use in asymmetric synthesis.
Enantiomerically Enriched Aminodiphosphines as Ligands for the Preparation of Catalysts for Asymmetric Synthesis
申请人:Alonso Xalma Mónica
公开号:US20120309997A1
公开(公告)日:2012-12-06
The present invention relates to enantiomerically enriched aminodiphosphine ligands where the chirality is located in the phosphorus atom and their preparation process, to catalysts containing them and their preparation process, as well as their use in asymmetric synthesis.
The present invention relates to phosphorus compounds containing imidazole groups, to optically active ligands prepared using them, to transition metal complexes which comprise such ligands, and to catalysts which comprise such transition metal complexes. The present invention further relates to the particular processes for preparing the phosphorus compounds, the optically active ligands, the transition metal complexes and the catalysts, and also to the use of the catalysts for organic transformation reactions.
Preparation of Optically Pure Beta-Amino Acids Having Affinity for the Alpha-Delta Protein
申请人:Herrinton Paul Matthew
公开号:US20080194841A1
公开(公告)日:2008-08-14
Disclosed are materials and methods for preparing optically active β-amino acids, which bind to the alpha-2-delta subunit of a calcium channel and are useful for treating pain, fibromyalgia, and a variety of psychiatric and sleep disorders. The method includes reacting a chiral allyl amine with a 2-alkynoate in the presence of a Lewis acid and a base to give a chiral tertiary enamine, which after reaction with ammonia, is hydrogenated to give optically active β-amino acids.