The present invention provides a process for preparing high purity cilostazol. The process comprises: (a) adding crude cilostazol to an acid selected from the group consisting of oxalic acid, maleic acid, sulfuric acid, and a mixture thereof to form a cilostazol salt; and (b) recovering cilostazol through adding a base to the cilostazol salt.
本发明提供了一种制备高纯度环丙沙唑的方法。该方法包括:(a)将粗环丙沙唑添加到从
草酸、
马来酸、
硫酸和它们的混合物中选择的酸中,形成环丙沙唑盐;和(b)通过向环丙沙唑盐中添加碱来回收环丙沙唑。