Optically impure tamsulosin including racemic tamsulosin can be resolved into optically pure (R)- or (S)-tamsulosin by the use of diastereomeric sulfonate salts of tamsulosin in a fractional crystallization technique. Racemic tamsulosin free base is a useful starting material for the resolution process and a method of obtaining the same in solid form, including two crystalline polymorphic forms, is also provided.
包括消旋
盐酸坦洛新在内的光学不纯的
坦洛新可以通过使用
坦洛新的对映异构
磺酸盐在分馏结晶技术中分离成光学纯的(R)-或(S)-
坦洛新。消旋
盐酸坦洛新游离碱是分离过程的有用起始物质,同时还提供了一种获得固体形式的方法,包括两种晶态多型形式。