Identification and Characterization of Potential Impurities of Dronedarone Hydrochloride
摘要:
Six potential process related impurities were detected during the impurity profile study of an antiarrhythmic drug substance, Dronedarone (1). Simple high performance liquid chromatography and liquid chromatography-mass spectrometry methods were used for the detection of these process impurities. Based on the synthesis and spectral data (MS, IR, H-1 NMR, C-13 NMR, and DEPT), the structures of these impurities were characterized as 5-amino-3-[4-(3-di-n-butylaminopropoxy)benzoyl]-2-n-butylbenzofuran (impurity I); N-(2-butyl-3-(4-(3-(dibutylamino)propoxy)benzoyl)benzofuran-5-yl)-N-(methylsulfonyl)methanesulfonamide (impurity II); N-(2-butyl-3-(4-(3-(dibutylamino)propoxy)benzoyl)benzofuran-5-yl)-1-chloromethanesulfonamide (impurity III); N-{2-propyl-3-[4-(3-dibutylaminopropoxy)benzoyl]benzofuran-5-yl}-methanesulfonamide (impurity IV); N-(2-butyl-3-(4-(3(dibutylamino)propoxy)benzoyl)benzofuran-5-yl)-formamide (impurity V); and (2-butyl-5-((3-(dibutylamino)propyl)amino)benzofuran-3-yl)(4-(3-(dibutylamino)propoxy)phenyl)methanone (impurity VI). The synthesis and characterization of these impurities are discussed in detail.
通过由市售和廉价的2-氨基硝基苯酚制备的2-碘硝基苯酚乙酸酯的Sonogashira交叉偶联反应已经实现了4-,5-和6-硝基苯并[ b ]呋喃的首次合成。将获得的2-炔基硝基苯酚乙酸酯在室温下进行KO t Bu促进的环化反应以形成硝基苯并[ b ]呋喃。给出了其他取代苯并[ b ]呋喃的合成和一锅偶联-环化的例子。
Compounds derived from 3-(benzofuran-5-yl)oxazolidin-2-one, preparation
申请人:Synthelabo
公开号:US06143772A1
公开(公告)日:2000-11-07
Compounds derived from 3-(benzofuran-5-yl) oxazolidin-2-one, of general formula (I) ##STR1## in which: R.sub.1 represents a phenyl group, a phenylmethyl group, an alkyl group or a fluoroalkyl group, and R.sub.2 represents a hydrogen atom or a methyl group. Application in therapeutics.