申请人:Zhejiang Huahai Licheng Pharmaceutical Co., Ltd.
公开号:EP3640240A1
公开(公告)日:2020-04-22
Provided is a method for purifying ropinirole hydrochloride (4-2-di-n-propylaminoethyl-1,3-dihydro-2H-indole-2-ketohydrochloride). The method comprises: adding ropinirole hydrochloride containing a monopropyl impurity A into water, adding organic solvent, stirring and dissolving at room temperature, adding alkali, stirring, standing, demixing, and removing an aqueous layer; optionally, drying the organic layer by using anhydrous magnesium sulfate, and filtering; and adding acyl chloride or acid anhydride into the organic layer, stirring, concentrating the organic layer to be dry, adding an organic solvent into the obtained oily substance, adding concentrated hydrochloric acid, and stirring, so as to obtain the ropinirole hydrochloride. By using the method, the impurity A in the ropinirole hydrochloride can be effectively removed, and the ropinirole hydrochloride can be obtained with a high yield and a high purity, so that the impurity A is controlled and the purity of the product reaches a medicinal standard.
提供了一种纯化盐酸罗匹尼罗(4-2-二-正丙基氨基乙基-1,3-二氢-2H-吲哚-2-酮盐酸盐)的方法。该方法包括将含有单丙基杂质 A 的盐酸罗匹尼罗加入水中,加入有机溶剂,在室温下搅拌溶解,加入碱,搅拌,静置,脱混,除去水层;可选择使用无水硫酸镁干燥有机层,过滤;向有机层中加入酰氯或酸酐,搅拌,浓缩干燥有机层,向得到的油状物中加入有机溶剂,加入浓盐酸,搅拌,得到盐酸罗匹尼罗。通过该方法,可以有效去除盐酸罗匹尼罗中的杂质A,得到高收率、高纯度的盐酸罗匹尼罗,使杂质A得到控制,产品纯度达到药用标准。