The present invention relates to a method of deprotecting a tetrazole compound, useful as an intermediate for angiotensin II receptor blockers, and provides a novel production method of angiotensin II receptor blockers.
Provided is a production method of a compound represented by the formula [3] or [4] or a salt thereof, including (i) reducing a compound represented by the formula [1] or [2] or a salt thereof in the presence of a metal catalyst and an alkaline earth metal salt, or (ii) reacting the compound with a particular amount of Brønsted acid:
wherein each symbol is as defined in the present specification.
The present invention provides compounds of Formula (I): wherein all variables are as defined in the specification, and compositions comprising any of such novel compounds. These compounds are biased agonists, or β-Arrestin agonists of the angiotensin II receptor, which may be used as medicaments.
[EN] PROCESS FOR PREPARING IRBESARTAN<br/>[FR] PROCESSUS POUR PRÉPARER DE L'IRBÉSARTAN
申请人:REDDYS LAB LTD DR
公开号:WO2005113518A1
公开(公告)日:2005-12-01
A process for preparing irbesartan comprises pentanoylation of cycloleucine in the presence of sodium hydroxide to form n-pentanoyl cycloleucine, condensing this product with 2-(4-aminomethyl phenyl) benzonitrile using dicyclohexyl carbodiimide and 1-hydroxy benzotriazole as a catalyst to form the 4-(?-N-pentanoyl amino) cyclopentamido methyl-2'-cyano biphenyl compound, and then cyclizing using trifluroacetic acid in the presence of an aromatic solvent to form cyano irbesartan. Cyano irbesartan is converted to irbesartan by reaction with tributyltin chloride and sodium azide in the presence of an aromatic solvent.
A process for the preparation of Irbesartan of formula (I)
using the steps of:
(i) reacting 4′ aminomethyl-2-cyano biphenyl of formula (VI) with 1-veleramido cyclopentane carboxylic acid of formula (V)
in an organic solvent and in the presence of an acid, without activating the —COOH group of compound of formula (V) to give 1-(2′cyanobiphenyl-4-yl-methylaminocarbonyl)-1-pentanoylamino cyclopentane of formula (VII).
converting the compound of formula (VII) obtained in step (i) to Irbesartan of formula (I) by reacting the compound of the formula (VII) with tributyl tin azide in o-xylene to give Irbesartan of formula (I).
使用以下步骤制备化合物Irbesartan的方法:
(i) 在有机溶剂和酸的存在下,将化合物4′氨甲基-2-氰基联苯(VI)与1-维拉米多环戊烷羧酸(V)反应,而不激活化合物V的—COOH基团,得到化合物1-(2′氰基联苯-4-基-甲基氨甲酰)-1-戊酰氨基环戊烷(VII)的方法。
(ii) 将步骤(i)中得到的化合物(VII)转化为Irbesartan(I)的方法,即将化合物(VII)与叔丁基锡叠氮化物在邻二甲苯中反应,得到Irbesartan(I)。
Form of irbesartan, methods for obtaining said form and pharmaceutical compositions containing same
申请人:Sanofi-Synthelabo
公开号:US06800761B1
公开(公告)日:2004-10-05
The invention relates to a novel crystalline form of irbesartan, to pharmaceutical compositions containing it, to processes for preparing it, and to a method for treating cardiovascular diseases utilizing it.