This invention provides a process for preparing pure telmisartan by condensing 2- n-propyl-4-methyl-6-(r-methylbenzimidazol-2'-yl) benzimidazole (I) with a compound of formula (II) to obtain the compound 2-cyano-4'-[2"-n-propyl-4"-methyl- 6"-(l"'-methylbenzimidazol-2"'-yl)benzimidazol-l"-ylmethyl] biphenyl (III), and subsequently hydrolyzing the isolated nitrile function group to obtain the telmisartan.
本发明提供了一种制备纯
替米沙坦的方法,通过将2-丙基-4-甲基-6-(r-甲基
苯并咪唑-2'-基)
苯并咪唑(I)与式(II)的化合物缩合,得到化合物2-
氰基-4'-[2"-丙基-4"-甲基-6"-(l"'-甲基
苯并咪唑-2"'-基)
苯并咪唑-1"-基甲基]
联苯(III),然后
水解分离的腈基团以获得
替米沙坦。