Process for the resolution of racemic (R,S) -5-(2-(2-(2- ethoxyphenoxy) ethylamino)propyl)-2-methoxybenzene sulfonamide (tamsulosin), its novel R and S isomers and their salts and processes for their preparation
申请人:Nageswara Rao Bolineni
公开号:US20060079714A1
公开(公告)日:2006-04-13
An improved process is described to resolve a racemic mixture in any proportion of 5-(2-(2-(2-ethoxyphenoxy)ethylamino)propyl)-2-methoxy benzene sulfonamide as a free base or some of its salts, with BPA either S or R form to obtain enantiomerically highly pure R and S-isomer as a well characterized free base or as a salt of the title compound. Also described are novel R and S-isomers of 5-(2-(2-(2-ethoxyphenoxy) ethylamino)propyl)-2-methoxy benzene sulfonamide and their salts and the processes for their preparation.
描述了一种改进的过程,用于在5-(2-(2-(2-乙氧基苯氧基)乙基氨基)丙基)-2-甲氧基苯磺胺作为自由基或其某些盐的任意比例的混合物中,与BPA的S或R形式进行分离,以获得对映异构体高度纯净的R和S异构体,作为标题化合物的明确的自由基或盐。还描述了5-(2-(2-(2-乙氧基苯氧基)乙基氨基)丙基)-2-甲氧基苯磺胺及其盐的新型R和S异构体,以及它们的制备过程。