[EN] AN IMPROVED PROCESS FOR THE PREPARATION OF AN INTERMEDIATE OF HMG-COA REDUCTASE INHIBITORS [FR] PROCÉDÉ AMÉLIORÉ POUR LA PRÉPARATION D'UN INTERMÉDIAIRE D'INHIBITEURS DE HMG-COA RÉDUCTASE
Practical Synthesis of Chiral Synthons for the Preparation of HMG-CoA Reductase Inhibitors
作者:Toshiro Konoike、Yoshitaka Araki
DOI:10.1021/jo00104a049
日期:1994.12
A practical procedure for the enantioselective preparation of optically pure (R)- and (S)-monomethyl esters of 3-[(tert-butyldimethylsilyl)oxy]pentanedioic acid has been developed by diastereoselective ring-opening of 3-[(tert-butyldimethylsilyl)oxy]pentanedioic anhydride 5 by benzyl (R)- and (S)-mandelate, respectively. These half-esters afforded chiral Wittig reagent 2 and Horner-Wadsworth-Emmons (HWE) reagent 1 efficiently which have been proved to be useful in the synthesis of HMG-CoA reductase inhibitors. The method is applied to the synthesis of the (R)-3-methylglutaric acid, monomethyl ester.
[EN] AN IMPROVED PROCESS FOR THE PREPARATION OF AN INTERMEDIATE OF HMG-COA REDUCTASE INHIBITORS<br/>[FR] PROCÉDÉ AMÉLIORÉ POUR LA PRÉPARATION D'UN INTERMÉDIAIRE D'INHIBITEURS DE HMG-COA RÉDUCTASE
申请人:MATRIX LAB LTD
公开号:WO2011141934A1
公开(公告)日:2011-11-17
The present invention relates to an improved process for the preparation of intermediates of HMG-CoA reductase inhibitors of Formulae-IXa or IXb and further conversion to HMG-CoA reductase inhibitors and pharmaceutically acceptable salts thereof.