The invention provides a production method of a biaryltetrazole derivative useful as an intermediate for an angiotensin II receptor antagonist. The method comprises reacting an aryltetrazole derivative with a benzene derivative, deprotecting or reducing the resulting compound, and halogenating the deprotected or reduced compound
[EN] PROCESS FOR PREPARATION OF CANDESART AN CILEXETIL SUBSTANTIALLY FREE OF DES-CANDESARTAN CILEXETIL IMPURITY<br/>[FR] PROCÉDÉ PERMETTANT DE PRÉPARER UN CILEXÉTIL DE CANDÉSARTAN NE CONTENANT SENSIBLEMENT PAS D'IMPURETÉ DE CILEXÉTIL DE DES-CANDÉSARTAN
申请人:HETERO RESEARCH FOUNDATION
公开号:WO2011145100A1
公开(公告)日:2011-11-24
The present invention provides a process for preparation of candeartan cilexetil substantially free of 2,3-dihydro-2-oxo-3-[[2'-(2H-tetrazol-5-yl)[l,l-biphenyl]-4- yl]methyl]-l-[[(cyclohexyloxy)carbonyl]oxy]ethylester-lH-benzimidazole-7- carboxylate (des-candesartan cilexetil) impurity.
[EN] PREPARATION OF CANDESARTAN CILEXETIL IN HIGH PURITY<br/>[FR] ELABORATION DE OF CANDESARTAN CILEXETIL DE PURETE ELEVEE
申请人:TEVA PHARMA
公开号:WO2005111021A1
公开(公告)日:2005-11-24
The present invention is directed to the preparation of substantially pure candesartan cilexetil by the deprotection of trityl candesartan cilexetil and crystallization and/or recrystallization of candesartan cilexetil.
The present invention encompasses pharmaceutical excipient complexes comprising combining at least one carrier with an oily substance, and processes for preparing the same, stable pharmaceutical compositions comprising such complexes and active pharmaceutical ingredients and processes for preparing the same.