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    • 3. 发明申请
    • AN IMPROVED PROCESS FOR PREPARING TELMISARTAN
    • 改进TELMISARTAN的改进方法
    • WO2011102645A2
    • 2011-08-25
    • PCT/KR2011/001041
    • 2011-02-17
    • DONG WHA PHARM. CO., LTD.OH, Yoon-SeokLIM, Jae-KyungCHOI, Jung-UkKWON, O-JinLEE, Jun-Sang
    • OH, Yoon-SeokLIM, Jae-KyungCHOI, Jung-UkKWON, O-JinLEE, Jun-Sang
    • C07D403/10C07D403/04C07D403/06
    • C07D403/04
    • The present invention relates to an improved process for preparing telmisartan from 4-methyl-6-(1-methyl-1 H -benzimidazole-2-yl)-2-propyl-1 H -benzimidazole and 2-[4-(bromomethyl)phenyl] benzoate by using condensation reaction and hydrolysis reaction wherein the condensation reaction is performed to prepare an intermediate by using mixed solvent of dimethyl sulfoxide and isopropanol as reaction solvent using dimethyl sulfoxide of 0.5~1.5 times and isopropanol of 1.5~4.5 times on the basis of the usage of 4-methyl-6-(1-methyl-1 H -benzimidazole-2-yl)-2-prophyl-1 H -benzimidazole and the hydrolysis reaction is performed to cause the reaction in mixed solvent of methanol of 7~9 times and purified water of 5~7 times on the basis of the intermediate. The process for preparing telmisartan according to the present invention provides a simple preparing process for mass production and improves a manufacturing yield with high purity by eliminating an additional process for removing an inorganic salt as a byproduct due to a base used in the condensation reaction and the hydrolysis reaction.
    • 本发明涉及从4-甲基-6-(1-甲基-1H-苯并咪唑-2-基)-2-丙基-1H-苯并咪唑和2- [4-(溴甲基)苯基]苯并咪唑制备替米沙坦的改进方法, 苯甲酸酯通过使用缩合反应和水解反应,其中通过使用二甲基亚砜和异丙醇的混合溶剂作为反应溶剂进行缩合反应,使用0.5〜1.5倍的二甲基亚砜和1.5〜4.5倍的异丙醇,基于 使用4-甲基-6-(1-甲基-1H-苯并咪唑-2-基)-2-预防-1H-苯并咪唑并进行水解反应,使甲醇混合溶剂中的反应为7〜9次, 纯化水为中间体5〜7次。 根据本发明的替米沙坦制备方法提供了一种简单的批量制备方法,通过除去由于缩合反应中使用的碱作为副产物而除去无机盐的附加方法,提高了高纯度的制造产率, 水解反应。