The invention relates to a method and compounds for the preparation of clevidipine butyrate, a very short acting hypertensive calcium antagonist, as well as the synthesis of these compounds useful for the preparation of clevidipine (also known as clevidipine butyrate). Moreover the invention also discloses polymorphic forms of clevidipine butyrate, useful for the preparation of pharmaceutical compositions, and processes to prepare them.
[EN] PROCESS FOR PREPARATION OF CLEVIDIPINE AND ITS INTERMEDIATE<br/>[FR] PROCÉDÉ DE PRÉPARATION DE CLÉVIDIPINE ET D'UN PRODUIT INTERMÉDIAIRE ASSOCIÉ
申请人:CADILA PHARMACEUTICALS LTD
公开号:WO2012069989A1
公开(公告)日:2012-05-31
The present invention relates to a process for the removal of t-butyl group from t-butyl methyl 4-(2',3'-dichlorophenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate to provide-1,4-dihydro-2,6-dimethyl-4-(2',3'-dichorophenyl)-5-methoxycarbonyl-3-pyridine- carboxylic acid, which is further converted to to yield clevidipine having HPLC purity over 6 99%.
The invention relates to a novel method and novel compounds for the preparation of clevidipine butyrate, a very short acting hypertensive calcium antagonist, as well as the synthesis of these new compounds useful for the preparation of clevidipine (also known as clevidipine butyrate). Moreover the invention also discloses new polymorphic forms of clevidipine butyrate, useful for the preparation of pharmaceutical compositions, and processes to prepare them.