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。