[EN] AN IMPROVED PROCESS FOR THE PREPARATION OF TAMSULOSIN HYDROCHLORIDE<br/>[FR] PROCEDE AMELIORE DE PREPARATION DE CHLORHYDRATE DE TAMSULOSINE
申请人:NATCO PHARMA LTD
公开号:WO2004016582A1
公开(公告)日:2004-02-26
The present invention relates to an improved process for the preparation of Tamsulosin hydrochloride. Tamsulosin hydrochloride is a widely used drug for the treatment of benign prostate hyperplasia. Tamsulosin hydrochloride has the formula-I given below. (I) The process employs the novel intermediates quarternised benzylidene ammonium salts, N-(phenyl substituted)-[2-(2-ethoxyphenoxy)ethyl]-[2-(4-methoxy-3-sulphamoylphenyl)-1(R)-methyl-ethyl]ammonium halides of the formula-II, (II) where R represents H, 4-OCH3, 4-OH or 4-fluoro and X represents C1, Br or I. And Schiff's bases, novel phenyl substituted 2-methoxy-5-[(2R)-[(1-E/Z-phenyl methylene)amino]propyl]benzenesulfonamide of the formula-III. (III) where R represents H, 4-OCH3, 4-OH or 4-fluoro.
该发明涉及一种改进的盐酸坦洛新制备工艺。盐酸坦洛新是一种广泛用于治疗良性前列腺增生的药物。盐酸坦洛新的分子式如下所示。该工艺采用了新型中间体季铵化苄亚甲基胺盐、N-(苯基取代)-[2-(2-乙氧基苯氧基)乙基]-[2-(4-甲氧基-3-磺胺基苯基)-1(R)-甲基乙基]铵卤化物的分子式-II,其中R代表H、4-OCH3、4-OH或4-氟,X代表Cl、Br或I。以及席夫碱,新型苯基取代的2-甲氧基-5-[(2R)-[(1-E/Z-苯基亚甲基)氨基]丙基]苯磺酰胺的分子式-III,其中R代表H、4-OCH3、4-OH或4-氟。