PALIPERIDONE OR A PHARMACEUTICALLY ACCEPTABLE SALT THEREOF SUBSTANTIALLY FREE OF IMPURITIES
申请人:Dixit Girish
公开号:US20120164188A1
公开(公告)日:2012-06-28
Provided herein are impurities of paliperidone, 3-[2-[4-[1-(4-fluoro-2-hydroxyphenyl)methanoyl]piperidinyl-1-yl]ethyl]-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one (methanoyl impurity), 3-[2-[4-(6-fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]ethyl]-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (dehydroxy impurity) and 3-[2-[4-(6-fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]ethyl]-2-methyl-7,8-dihydro-6H-pyrido[1,2-a]pyrimidin-4,9-dione (9-keto impurity), and processes for preparing and isolating thereof. Provided further herein is a highly pure paliperidone or a pharmaceutically acceptable salt thereof substantially free of methanoyl, dehydroxy and 9-keto impurities, process for the preparation thereof, and pharmaceutical compositions comprising highly pure paliperidone or a pharmaceutically acceptable salt thereof substantially free of methanoyl, dehydroxy and 9-keto impurities. Provided also herein are improved and efficient processes for preparing paliperidone intermediates.
本文提供了
帕利哌酮的
杂质,包括3-[2-[4-[1-(4-
氟-2-羟基
苯基)甲酰]
哌啶-1-基]乙基]-
2-甲基-6,7,8,9-四
氢-4H-
吡啶并[1,2-a]
嘧啶-4-
酮(甲酰基
杂质)、3-[2-[4-(6-
氟-1,2-
苯并
异噁唑-3-基)-1-
哌啶基]乙基]-
2-甲基-4H-
吡啶并[1,2-a]
嘧啶-4-
酮(去羟基
杂质)和3-[2-[4-(6-
氟-1,2-
苯并
异噁唑-3-基)-1-
哌啶基]乙基]-
2-甲基-7,8-二
氢-6H-
吡啶并[1,2-a]
嘧啶-4,9-二
酮(9-
酮杂质),以及其制备和分离的方法。本文还提供了高纯度的
帕利哌酮或其药学上可接受的盐,基本上不含甲酰基、去羟基和9-
酮杂质,以及其制备方法和含有高纯度
帕利哌酮或其药学上可接受的盐的制剂。本文还提供了改进和高效的
帕利哌酮中间体制备方法。