[EN] NEW PROCESS FOR THE PREPARATION OF OPTICALLY ACTIVE 2-[6-(SUBSTITUTED ALKYL)-1,3-DIOXAN-4-YL]ACETIC ACID DERIVATIVES<br/>[FR] NOUVEAU PROCEDE DE PREPARATION DE DERIVES OPTIQUEMENT ACTIFS D'ACIDE 2-[6-(ALKYLE SUBSTITUE)-1,3-DIOXAN-4-YL] ACETIQUE
申请人:CHOONGWAE PHARMA CORP
公开号:WO2003053950A1
公开(公告)日:2003-07-03
The present invention relates to new process for preparing as a key chiral intermediate compound of formula (I) obtained from an epoxy-β -hydroxy carboxylic acid ester of formula (II) prepared from epoxide compound of formula (III), in which said compound of formula (I) is useful for preparing the therapeutic agent for hyperlipidemia, such as Astrovastatin and Fluvastatin. Wherein R1 denotes a hydrogen atom, alkyl, aryl or alkylaryl, R2 and R3 which can be identical or different, are a lower alkyl or phenyl and are capable of forming a six-membered ring, R4 stands for hydroxy, amino, alkylamino, azido, cyano, halogeno, aryloxy, alkyloxy, arylalkyloxy, alkyl, alkenyl, aryl, or aminomethyl, etc.