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发明授权
CN106631918B 拆分坦索罗辛对映异构体的方法 有权

拆分坦索罗辛对映异构体的方法
摘要：
本发明涉及拆分坦索罗辛对映异构体的方法。具体地说，本发明涉及一种将以下式(1)的坦索罗辛拆分成其R‑和S‑对映体的方法，该方法包括如下步骤：(a)将(R)和(S)坦索罗辛游离碱的固体混合物溶于溶剂，并且使所述游离碱与樟脑‑10‑磺酸反应，以形成含坦索罗辛的一对非对映樟脑‑10‑磺酸盐的溶液；从该含有坦索罗辛的一对非对映樟脑‑10‑磺酸盐的溶液中优先沉淀坦索罗辛的一种非对映樟脑‑10‑磺酸盐，从而形成富集了一种非对映体的沉淀物和富集了另一种非对映体的溶质；(b)从所述富含非对映体的沉淀物和溶质之一中，释放坦索罗辛游离碱，从而形成旋光富集的坦索罗辛游离碱。本发明方法具有优异的工艺性能。
摘要（英）：

The invention relates to a method of resolving tamsulosin enantiomer, and in particular, relates to a method of resolving tamsulosin, represented as the formula (I), into an R-enantiomer and an S-enantiomer. The method includes the steps of: (a) dissolving a solid mixture of (R)-tamsulosin free alkali and (S)-tamsulosin free alkali in a solvent and performing a reaction to the free alkalis with camphor-10-sulfonic acid to form a solution containing a pair of diastereomeric camphor-10-sulfonates of tamsulosin, and then preferentially precipitating one diastereomeric camphor-10-sulfonate of the tamsulosin from the solution containing a pair of the diastereomeric camphor-10-sulfonates of tamsulosin, thereby forming a precipitate, in which one diastereomer is enriched, and a solute, in which the other one diastereomer is enriched; and (b) from one of the precipitate and the solute, releasing tamsulosin free alkali to obtain optical-rotation-enriched tamsulosin free alkali. The method has excellent technical performance.

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