The Use of a Lactonized Statin Side-Chain Precursor in a Concise and Efficient Assembly of Pitavastatin
作者:Zdenko Časar、Jan Fabris、Ivana Smilović
DOI:10.1055/s-0031-1290916
日期:2012.6
crystallization from aqueous methanol. Subsequent deprotection, hydrolysis, and cation exchange in a one-pot operation provided pitavastatin calcium in 93% yield. A concise and simple synthetic route to pitavastatin is described. The approach involves a highly stereoselective Wittig olefination reaction between a lactonized statin side-chain precursor and the triphenylphosphonium bromide salt of the corresponding
Process for Preparing Pitavastatin, Intermediates and Pharmaceuctically Acceptable Salts Thereof
申请人:Satyanarayana Reddy Manne
公开号:US20120016129A1
公开(公告)日:2012-01-19
Processes for preparing pravastatin, intermediates and pharmaceutically acceptable salts thereof are provided Crystalline forms of pravastatin, intermediates and pharmaceutically acceptable salts thereof are also disclosed.
[EN] CRYSTAL FORM OF QUINOLINE COMPOUND AND PROCESS FOR ITS PRODUCTION<br/>[FR] FORME CRISTALLINE D'UN COMPOSE DE QUINOLINE, ET METHODE DE PRODUCTION DE LA FORME CRISTALLINE
申请人:NISSAN CHEMICAL IND LTD
公开号:WO2005063711A1
公开(公告)日:2005-07-14
A method for producing a drug substance of crystalline pitavastatin calcium excellent in stability, is presented. In the production of a compound (pitavastatin calcium) represented by the formula (1): The water content is adjusted to a level of from 5 to 15%, and the crystal form is controlled to be crystal form A, thereby to obtain a drug substance excellent in stability.