[EN] PROCESS FOT THE PREPARATION OF (4-HYDROXY-6-OXO-TETRAHYDROPYRAN-2-YL) ACETONITRILE AND DERIVATIVES THEREOF<br/>[FR] PROCEDE DE PREPARATION DE (4-HYDROXY-6-OXO-TETRAHYDROPYRAN-2-YL)-ACETONITRILE ET DE DERIVES CORRESPONDANTS
申请人:DSM IP ASSETS BV
公开号:WO2004096788A1
公开(公告)日:2004-11-11
The invention relates to a process for the preparation of (4-hydroxy-6-oxo-tetrahydro-pyran-2-yl)-acetonitrile from 6-X-substituted-methyl-4-hydroxy-tetrahydro-pyran-2-one, wherein X stands for a leaving group, by reacting 6-X-substituted-methyl-4-hydroxy-tetrahydro-pyran-2-one with a cyanide ion in water and by subsequent lowering of the pH to a pH between 0 and 5. (4-hydroxy-6-oxo-tetrahydro-pyran-2-yl)-acetonitrile and other compounds obtainable from (4-hydroxy-6-oxo-tetrahydro-pyran-2-yl)-acetonitrile may suitably be used in the preparation of a pharmaceutical preparation, more in particular in the preparation of statins, more in particular in the preparation of Atorvastatine or a salt thereof, for instance its calcium salt. The invention also relates to (4-hydroxy-6-oxo-tetrahydro-pyran-2-yl)-acetonitrile and other compounds obtainable therefrom.
[EN] ESTERS OF HEXANOIC ACIDS AS INTERMEDIATES FOR THE PREPARATION OF ATORVASTATIN<br/>[FR] ESTERS D'ACIDES HEXANOÏQUES COMME INTERMÉDIAIRES POUR LA PRÉPARATION D'ATORVASTATINE
申请人:DSM SINOCHEM PHARM NL BV
公开号:WO2012034958A1
公开(公告)日:2012-03-22
The invention relates to compounds of general formula (3) wherein R4 is allyl, 2-butyl, cyclohexyl, 3-methyl-2-butyl or 4-methyl-2-pentyl, a method for the preparation of compounds of general formula (3) and their use in the preparation of atorvastatin.