Application of optically active 1,2-diol monotosylates for synthesis of β-azido and β-amino alcohols with very high enantiomeric purity. Synthesis of enantiopure (R)-octopamine, (R)-tembamide and (R)-aegeline
A new class of chiral modifiers for the enantioselective hydrogenation of α-ketoesters with
作者:Keith E Simons、Guozhi Wang、Thomas Heinz、Thomas Giger、Tamas Mallat、Andreas Pfaltz、Alfons Baiker
DOI:10.1016/0957-4166(95)00034-m
日期:1995.2
A series of enantiomerically pure chiral amino alcohols have been synthesized and applied as modifiers in the enantioselective hydrogenation of ethyl pyruvate over supported Pt catalysts. Their use enabled an enantiomeric excess of up to 75 %. A molecular modelling study of the modifiers and reactant on a Pt (111) surface provides a possible explanation for the observed enantiodifferentiation.
METHOD FOR THE PREPARATION OF OPTICALLY ACTIVE 2-SULFONYLOXY-1-PHENYLETHANOL DERIVATIVES
申请人:Lee Kee-In
公开号:US20100063317A1
公开(公告)日:2010-03-11
Optically active 2-sulfonyloxy-1-phenylethanol derivative of formula (II) can be prepared easily and selectively by the method of the present invention using an asymmetric reduction of an α-sulfonyloxy acetophenone compound with a rhodium catalyst having petamethylcyclopentadienyl group and a hydrogen donor, and the compound of formula (II) obtained in the inventive method exhibits a higher e.e. (enantiomer excess) value than that of the products in the conventional methods.
US8044245B2
申请人:——
公开号:US8044245B2
公开(公告)日:2011-10-25
[EN] METHOD FOR THE PREPARATION OF OPTICALLY ACTIVE 2-SULFONYLOXY-1-PHENYLETHANOL DERIVATIVES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE DÉRIVÉS 2-SULFONYLOXY-1-PHÉNYLÉTHANOL OPTIQUEMENT ACTIFS
申请人:KOREA RES INST CHEM TECH
公开号:WO2008054155A1
公开(公告)日:2008-05-08
[EN] Optically active 2-sulfonyloxy-1-phenylethanol derivative of formula (II) can be prepared easily and selectively by the method of the present invention using an asymmetric reduction of an a-sulfonyloxy acetophenone compound with a rhodium catalyst having petamethylcyclopentadienyl group and a hydrogen donor, and the compound of formula (II) obtained in the inventive method exhibits a higher e.e. (enantiomer excess) value than that of the products in the conventional methods. [FR] L'invention concerne un dérivé 2-sulfonyloxy-1-phényléthanol optiquement actif de formule (II) qui peut être préparé facilement et de manière sélective par le procédé de la présente invention en utilisant une réduction asymétrique d'un composé ¥á-sulfonyloxy acétophénone avec un catalyseur au rhodium ayant un groupe pentaméthylcyclopentadiényle et un donneur d'hydrogène, et le composé de formule (II) obtenu par le procédé de l'invention présente une valeur e.e. (excès énantiomérique) supérieure à celle des produits dans les procédés classiques.