A process for preparation of eletriptan hydrobromide having a-form of formula (I) is described that includes reducing 3-((R)-1-methylpyrrolidin-2-yl)methyl)-5-((E)-2-(phenylsulfonyl)vinyl)-1H-indole of formula (II) in presence of a metal catalyst to the product of formula (III) and then converting to hydrobromide salt having a-form of formula (I).
本发明描述了一种制备具有公式(I)的a型的厄利替普坦
氢溴酸盐的过程,其中包括在
金属催化剂的存在下还原公式(II)的3-((R)-
1-甲基吡咯烷-2-基)甲基)-5-((E)-2-(苯基磺酰基)
乙烯基)-1H-
吲哚至公式(III)的产物,然后转化为具有公式(I)的
氢溴酸盐。