The invention relates to the racemisation process of the optically active [2-(2-thienyl)ethylamino](2-halogenophenyl)acetamides of general formula (VII) by using basic compounds.
The resulting racemic compounds of general formula (VII) can thus be recycled into synthesis of the therapeutically useful compounds of general formula (VI).
Process for the preparation of optically enriched clopidogrel
申请人:Krka Tovarna Zdravil, D.D., Novo Mesto
公开号:EP2107061A1
公开(公告)日:2009-10-07
The invention relates to a process for the preparation of substantially optically pure or optically enriched clopidogrel or a pharmaceutically acceptable salt or solvate thereof. The invention also relates to a process for the preparation of a pharmaceutical formulation comprising substantially optically pure clopidogrel, or a pharmaceutically acceptable salt or solvate thereof, in combination with at least one pharmaceutically acceptable carrier.
The invention relates to processes for the preparation of clopidogrel and salts thereof. The inventors have developed a process for preparing racemic clopidogrel by racemizing R(−) clopidogrel. The process includes the step of reacting R(−) clopidogrel with a powered anhydrous base in one or more solvents.
The formation of melt granulates comprising the drug clopidogrel of the following formula
or a pharmaceutically acceptable salt thereof markedly reduces degradation of clopidogrel and its salts on storage.
含有药物氯吡格雷或其药用可接受的盐的熔融颗粒的形成显著减少了氯吡格雷及其盐在储存过程中的降解。
[EN] CLOPIDOGREL NAPSYLATE SALT<br/>[FR] SEL DE NAPSYLATE DE CLOPIDOGREL
申请人:IVAX CORP
公开号:WO2006023676A1
公开(公告)日:2006-03-02
Crystalline and amorphous forms of clopidogrel napsylate are useful in the preparation of dosage forms of the antithrombotic agent, clopidogrel.