The present invention provides a process for the preparation of paliperidone or a pharmaceutically acceptable salt thereof, wherein the process comprises condensing a compound of formula (II)
with a compound of formula (III) or a salt thereof,
in a suitable solvent and a base, in the presence of a catalyst and an inhibiting agent, wherein the inhibiting agent is added to the reaction system before the compound of formula (II) and compound of formula (III) have reacted or as the reaction of the compound of formula (II) and compound of formula (III) is initiated, and optionally converting the paliperidone to a salt thereof, wherein X is a suitable leaving group. The present invention also provides substantially pure paliperidone or a salt thereof, paliperidone or a salt thereof as prepared by the process and uses of the paliperidone or salt thereof.
本发明提供了一种制备
帕利哌酮或其药用可接受盐的方法,其中该方法包括在适当溶剂和碱的存在下,通过将式(II)化合物与式(III)化合物或其盐进行缩合反应,同时存在催化剂和
抑制剂,其中
抑制剂在化合物式(II)和化合物式(III)发生反应之前或在化合物式(II)和化合物式(III)的反应被启动时被加入到反应体系中,并可选择将
帕利哌酮转化为其盐,其中X是适当的离去基团。本发明还提供了基本纯净的
帕利哌酮或其盐,以及通过该方法制备的
帕利哌酮或其盐,以及
帕利哌酮或其盐的用途。