Diastereoselective Michael Addition of Nitromethane to Enoates Derived From (<i>R</i>)-Glyceraldehyde Acetonide
作者:Vera L. Patrocinio、Paulo R. R. Costa、Carlos R. D. Correia
DOI:10.1055/s-1994-25504
日期:——
The Michael addition of nitromethane to enoates derived from glyceraldehyde acetonide leads to syn-adducts 3 with high diastereoselectivity (de 76-90 %). The stereochemistry of the new stereogenic center was determined by transforming the Michael adduct 3b into lactone 6a.
PROCESS FOR THE ENANTIOSELECTIVE PREPARATION OF PREGABALIN
申请人:Ortuno Rosa M.
公开号:US20100197939A1
公开(公告)日:2010-08-05
The invention provides a new enantioselective process for the preparation of (S)-pregabalin, or a pharmaceutical acceptable addition acid salt comprising: acid hydrolysis of the dioxolan ring of a chiral compound of general formula (I) to obtain compound of general formula (II); oxidation of compound (II) to obtain a compound of general formula (III) and transforming compound (III) into compound of general formula (IV); subjecting compound (IV) to basic hydrolysis to obtain a compound of general formula (V) which is reduced to obtain enantiomerically pure S-pregabalin. The invention also provides new chiral intermediates involved in the process.
Stereoselective and efficient synthesis of (S)-pregabalin from d-mannitol
作者:Sandra Izquierdo、Jordi Aguilera、Helmut H. Buschmann、Mónica García、Antoni Torrens、Rosa M. Ortuño
DOI:10.1016/j.tetasy.2008.03.005
日期:2008.4
A straightforward synthesis of (S)-pregabalin in 28% overall yield starting from D-mannitol acetonide, as a primary source of chirality, is presented. The process is suitable for large-scale synthesis and involves simple and high-yielding chemical transformations as well as low-cost commercially available reagents. (c) 2008 Elsevier Ltd. All rights reserved.
[EN] PROCESS FOR THE ENANTIOSELECTIVE PREPARATION OF PREGABALIN<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION ÉNANTIOSÉLECTIVE DE LA PRÉGABALINE
申请人:ESTEVE LABOR DR
公开号:WO2009010554A1
公开(公告)日:2009-01-22
The invention provides a new enantioselective process for the preparation of (S) -pregabalin, or a pharmaceutical acceptable addition acid salt comprising: acid hydrolysis of the dioxolan ring of a chiral compound of general formula (I) to obtain compound of general formula (II); oxidation of compound (II) to obtain a compound of general formula (III) and transforming compound (III) into compound of general formula (IV); subjecting compound (IV) to basic hydrolysis to obtain a compound of general formula (V) which is reduced to obtain enantiomerically pure S-pregabalin. The invention also provides new chiral intermediates involved in the process.
Process for the enantioselective preparation of pregabalin
申请人:Laboratorios del Dr. Esteve S.A.
公开号:EP2017273A1
公开(公告)日:2009-01-21
The invention provides a new enantioselective process for the preparation of (S)-pregabalin, or a pharmaceutical acceptable addition acid salt comprising: acid hydrolysis of the dioxolan ring of a chiral compound of general formula (I) to obtain compound of general formula (II); oxidation of compound (II) to obtain a compound of general formula (III) and transforming compound (III) into compound of general formula (IV); subjecting compound (IV) to basic hydrolysis to obtain a compound of general formula (V) which is reduced to obtain enantiomerically pure S-pregabalin. The invention also provides new chiral intermediates involved in the process.