The present invention relates to an improved process for the preparation of 3-(N-methyl-2(R)-pyrrolidinyl methyl)-5-[2-(phenyl sulfonyl)ethyl]-1H-indole or pharmaceutically acceptable salts thereof, particularly 3-(N-methyl-2(R)-pyrrolidinyl methyl)-5-[2-(phenyl sulfonyl)ethyl]-1H-indole hydrobromide (Eletriptan hydrobromide). The present invention further relates to novel polymorphs of 3-(N-methyl-2(R)-pyrrolidinyl methyl)-5-[2-(phenyl sulfonyl)ethenyl]-1H-indole hydrobromide and process for preparation thereof.
本发明涉及一种改进的制备3-(N-甲基-2(R)-
吡咯烷基)-5-[2-(苯基磺酰基)乙基]-1H-
吲哚或其药学上可接受的盐,特别是3-(N-甲基-2(R)-
吡咯烷基)-5-[2-(苯基磺酰基)乙基]-1H-
吲哚溴化氢盐(依那曲坦
溴化氢盐)。本发明还涉及3-(N-甲基-2(R)-
吡咯烷基)-5-[2-(苯基磺酰基)
乙烯基]-1H-
吲哚溴化氢盐的新晶型及其制备方法。