Kinetic resolution of amino alcohol derivatives with a chiral nucleophilic catalyst: access to enantiopure cyclic cis-amino alcoholsElectronic supplementary information (ESI) available: experimental details. See http://www.rsc.org/suppdata/cc/b1/b108753c/
Acylative kinetic resolution of racemic cyclic cis-amino alcohol derivatives with a chiral nucleophilic catalyst proceeds enantioselectively (s = 10–21) at ambient temperature to give enantiopure recovered materials, and the % conversion of the acylation can be readily controlled by the amount of acid anhydride.
Polydentate asymmetric ligands based on binaphthyl
申请人:DEGUSSA AG
公开号:US20020188123A1
公开(公告)日:2002-12-12
Novel polydentate asymmetric nitrogen-oxygen-containing binaphthyl derivatives of the formulae (I) and (II), and metal complexes of these compounds may be used as catalysts for enantioselective transformations.
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Mehrzähnige unsymmetrische Liganden auf Binaphthylbasis
申请人:Degussa AG
公开号:EP1256570A1
公开(公告)日:2002-11-13
Die vorliegende Erfindung beinhaltet neue mehrzähnige unsymmetrische Stickstoff-Sauerstoff-haltige Binaphthylderivate der Formeln (I) und (II) und deren Synthese sowie Komplexe dieser Verbindungen mit Metallen und deren Verwendung als Katalysatoren für enantioselektive Transformationen.
Highly Diastereoselective <i>anti</i>-Aldol Reactions Utilizing the Titanium Enolate of <i>cis</i>-2-Arylsulfonamido-1- acenaphthenyl Propionate
作者:Arun K. Ghosh、Jae-Hun Kim
DOI:10.1021/ol034086n
日期:2003.4.1
[GRAPHIC]anti-Aldol reaction of Ti-enolate derived from cis-2-aryisulfonamido-1-acenaphthenyl propionate with representative aldehydes proceeded in excellent yield with high diastereoselectivity. Both enantiomers of cis-2-amino-1-acenaphthenol were synthesized employing lipase-catalyzed kinetic resolution as the key step.
cis-2-Amino-1-acenaphthenol: Practical resolution and application to the catalytic enantioselective reduction of ketones
The chiral amino alcohol, cis-2-amino-1-acenaphethenol, was resolved via its (R)-2-phenylpropionic acid salt. This amino alcohol was used as the precursor of a chiral oxazaborolidine, which was an efficient chiral catalyst in the asymmetric reduction of prochiral ketones.