Process for the preparation of key intermediates for the synthesis of statins or pharmaceutically acceptable salts thereof
申请人:LEK Pharmaceuticals d.d.
公开号:EP2423195A1
公开(公告)日:2012-02-29
The invention relates to commercially viable process for the synthesis of key intermediates for the preparation of statins, in particular Rosuvastatin and Pitavastatin or respective pharmaceutically acceptable salts thereof. A new simple and short synthetic route for key intermediates is presented which benefits from the use of cheap and readily available starting materials, by which the conventionally most frequently used DIBAL-H as reducing agent can be avoided.
[EN] PROCESS FOR THE PREPARATION OF KEY INTERMEDIATES FOR THE SYNTHESIS OF STATINS OR PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF<br/>[FR] PROCÉDÉ DE PRÉPARATION D'INTERMÉDIAIRES CLÉS POUR LA SYNTHÈSE DE STATINES OU SELS PHARMACEUTIQUEMENT ACCEPTABLES DE CEUX-CI
申请人:LEK PHARMACEUTICALS
公开号:WO2012013325A1
公开(公告)日:2012-02-02
The invention relates to commercially viable process for the synthesis of key intermediates for the preparation of statins, in particular Rosuvastatin and Pitavastatin or respective pharmaceutically acceptable salts thereof. A new simple and short synthetic route for key intermediates is presented which benefits from the use of cheap and readily available starting materials, by which the conventionally most frequently used DIBAL-H as reducing agent can be avoided.
[EN] IMPROVED PROCESS FOR PREPARING STATIN PRECURSOR<br/>[FR] PROCÉDÉ AMÉLIORÉ DE PRÉPARATION DE PRÉCURSEUR DE STATINE
申请人:DSM SINOCHEM PHARM NL BV
公开号:WO2016116589A1
公开(公告)日:2016-07-28
The present invention relates to a process for preparing a statin precursor, which process comprises a first reaction step, wherein a hydroxy-pyrimidine-carbonitrile is reacted with an organic sulfonyl halide to form the sulfonate-pyrimidine-carbonitrile; a second reaction step, wherein the sulfonate-pyrimidine-carbonitrile is reacted with N-methylmethane sulfonamide to form a pyrimidinyl-sulfonamide; and optionally a third reaction step, wherein the pyrimidinyl-sulfonamide is reacted with a reducing agent. All steps are conducted in toluene as the main solvent.
[EN] PROCESS FOR PREPARATION OF ROSUVASTATIN CALCIUM<br/>[FR] PROCÉDÉ DE PRÉPARATION DE CALCIUM DE ROSUVASTATINE
申请人:REDDYS LAB LTD DR
公开号:WO2012172564A1
公开(公告)日:2012-12-20
Disclosed is the process for the preparation of 4-(fluorophenyl)-6-isopropyl-2-(N-methyl-N-methylsulfonylamino)-5-formyl-pyrimidine of formula (I), which is the intermediate of rosuvastatin calcium. Purification of substantially pure acetonide protected tert-butyl ester of rosuvastatin (II) and its use for the preparation of substantially pure amorphous rosuvastatin calcium are also disclosed.
PROCESS FOR THE PREPARATION OF KEY INTERMEDIATES FOR THE SYNTHESIS OF STATINS OR PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF
申请人:Casar Zdenko
公开号:US20140051854A1
公开(公告)日:2014-02-20
The invention relates to commercially viable process for the synthesis of key intermediates for the preparation of statins, in particular Rosuvastatin and Pitavastatin or respective pharmaceutically acceptable salts thereof. A new simple and short synthetic route for key intermediates is presented which benefits from the use of cheap and readily available starting materials, by which the conventionally most frequently used DIBAL-H as reducing agent can be avoided.