A process for the preparation of pure Duloxetine hydrochloride comprises the steps of: a) reacting 1-(thiophen-2-yl)ethanone with dimethylamine hydrochloride, b) purifying the component in a solvent, c) reducing the component with an alkali metal borohydride, d) resolving the compound with a chiral acid, and treating the obtained compound with weak inorganic base, e) reacting the compound to give Duloxetine oxalate salt and f) converting the Duloxetine salt into its hydrochloride salt. Further the purifications of the obtained compound and of two intermediate products are described.
一种制备纯度Duloxetine hydrochloride的方法,包括以下步骤:a)将1-(thiophen-2-yl)ethanone与
盐酸二甲胺反应,b)用溶剂纯化组分,c)用碱
金属
硼氢化物还原组分,d)用手性酸分离化合物,然后用弱
无机碱处理所得化合物,e)反应化合物得到Duloxetine
草酸盐,f)将Duloxetine盐转化为其盐酸盐。进一步描述了所得化合物和两个中间产物的纯化过程。