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)。
PROCESS FOR THE PREPARATION OF IRBESARTAN
申请人:DIVI Murali Krishna Prasad
公开号:US20110275828A1
公开(公告)日:2011-11-10
The present invention relates to a process for the preparation of 2-butyl-3-[[2′-(1H-tetrazol-5-yl)[1,1′-biphenyl]-4-yl]-1,3-diazaspiro[4,4]non-1-en-4-one by reaction of the corresponding nitrile with sodium azide and piperazine or its acid salt.
The present invention relates to an improved process for the preparation of 2-n-butyl-3-[[2′-(1H-tetrazol-5-yl)[1,1′-biphenyl]-4-yl]-1,3-diazaspiro[4.4]non-1-en-4-one (Irbesartan)