Process for the separation of R(-)-and S(+)-5-[2-[[2-(2-ethoxyphenoxy)ethyl]amino]propyl]-2-methoxybenzenesulfonamide
申请人:Fernandez Blanco Cristina
公开号:US20050004398A1
公开(公告)日:2005-01-06
The process for separating the R(−)- and S(+)-5-[2-[[2-(2-ethoxyphenoxy)ethyl]amino]propyl]-2-methoxybenzene-sulfonamide enantiomers comprises (a) reacting a mixture of said enantiomers with an optically active organic acid to form diastereoisomeric salts with said enantiomers, where in said diastereoisomeric salts have different solubility and can be separated by crystallization; (b) separating the diastereoisomeric salt mixture enriched in the salt of one of the enantiomers; and (c) releasing said salts to obtain the R(−)or S(+) enantiomer. The R(−)-5-[2-[[2-(2-ethoxyphenoxy) ethyl]amino]propyl]-2-methoxybenzenesulfonamide enantiomer has α-adrenergic blocking activity and is useful as an antihypertensive agent suitable for the treatment of congestive heart failure and benign prostatic hypertrophy.
将R(−)-和S(+)-5-[2-[[2-(2-ethoxyphenoxy)ethyl]amino]propyl]-2-methoxybenzene-sulfonamide对映异构体分离的过程包括:(a)将混合的对映异构体与旋光有机酸反应,形成与该对映异构体形成的对映异构盐,其中所述对映异构盐具有不同的溶解度,可以通过结晶分离;(b)分离富集了其中一种对映异构体盐的对映异构盐混合物;和(c)释放所述盐以获得R(−)或S(+)对映异构体。R(−)-5-[2-[[2-(2-ethoxyphenoxy)ethyl]amino]propyl]-2-methoxybenzenesulfonamide对映异构体具有α-肾上腺素受体阻滞活性,可用作适用于治疗充血性心力衰竭和良性前列腺增生的降压药物。