申请人:Espinos Taya Jose
公开号:US20080262089A1
公开(公告)日:2008-10-23
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。