Process for preparing an angiotensin II receptor antagonist
申请人:FARMAPROJECTS S.L.
公开号:EP1749828A1
公开(公告)日:2007-02-07
Process for preparing irbesartan, protected forms for the preparation thereof, or a pharmaceutically acceptable salt thereof, that comprises the reaction between a biphenylamino derivative and an oxazolone derivative.
[EN] SYNTHESIS OF 2-BUTYL-3-(2'-(1-TRITYL-1H-TETRAZOL-5-YL)BIPHENYL-4-YL)-1,3-DIAZASPIROL[4,4]-NON-ENE-4-ONE<br/>[FR] SYNTHESE DE 2-BUTYL-3-(2'-(1-TRITYL-1H-TETRAZOL-5-YL)BIPHENYL-4-YL)-1,3-DIAZASPIRO[4,4]-NON-EN-4-ONE
申请人:TEVA PHARMA
公开号:WO2004072064A1
公开(公告)日:2004-08-26
Provided is a novel method of making 2-butyl-3-[[2'(1-trityl-1H-tetrazol-5-yl)biphen-4-yl]methyl]1,3-diazaspiro[4,4]non-1-ene-4-one, which can be converted to irbesartan. Also provided are methods of making irbesartan.
Process for Preparing an Angiotensin II Receptor Antagonist
申请人:Bessa Belmunt Jordi
公开号:US20080281097A1
公开(公告)日:2008-11-13
Process for preparing angiotensin II receptor antagonists, in particular irbesartan, protected forms for the preparation thereof, or a pharmaceutically acceptable salt thereof, that comprises the reaction between a biphenylamino derivative and an oxazolone derivative. New intermediates are useful for the preparation of angiotensin II receptor antagonists.
Method For Obtaining A Pharmaceutically Active Compound (Irbesartan) And Its Synthesis Intermediate
申请人:Huguet Clotet Joan
公开号:US20090124677A1
公开(公告)日:2009-05-14
It is provided a method for obtaining Irbesartan polymorph A, with few synthesis steps, by coupling the intermediate of formula (II) with the compound of formula (III), neutralising one of its alkaline salts in an aqueous medium and recrystallising the crude product obtained. The utilisation of said method obviates protection and deprotection of the tetrazole ring and is therefore of considerable interest for obtaining Irbesartan on a large industrial scale. The invention also refers to the synthesis intermediate of formula (II).