The invention includes an improved process for producing tamsulosin comprising reacting 5-(2-aminopropyl)-2-methoxybenzenesulfonamide with 2-(o-ethoxyphenoxy)ethyl bromide in an organic phosphite solvent to obtain tamsulosin. Optically pure (R)-5-(2-aminopropyl)-2-methoxybenzenesulfonamide can be employed to produce optically pure (R)-tamsulosin product. The organic phosphite solvent utilized in the reaction can include tri-alkyl phosphites such as triethyl phosphite, trimethyl phosphite, and tributyl phosphite. Additionally, processes for producing tamsulosin having a low concentration of by-product contaminants, such as 5-((R)-2-Bis-[2-(2-ethoxyphenoxy)ethyl]amino}-propyl)-2-methoxybenzenesulfonamide, and the use of such by-products to monitor the chemical purity of tamsulosin, are provided.
该发明涉及一种改进的生产
坦索罗辛的方法,包括在有机
磷酸酯溶剂中反应5-(2-
氨基丙基)-2-
甲氧基苯磺酰胺和2-(o-乙氧基苯氧基)乙基
溴以获得
坦索罗辛。可以使用光学纯(R)-5-(2-
氨基丙基)-2-
甲氧基苯磺酰胺来制备光学纯(R)-
坦索罗辛产品。在反应中使用的有机
磷酸酯溶剂可以包括三烷基
磷酸酯,例如三
乙基磷酸酯,三甲基
磷酸酯和三
丁基磷酸酯。此外,还提供了生产低浓度副产物污染物(例如5-((R)-2- 双-[2-(2-乙氧基苯氧基)乙基]
氨基} -丙基)-2-
甲氧基苯磺酰胺)的
坦索罗辛的方法以及使用这些副产物来监测
坦索罗辛的
化学纯度的方法。