Provided is a process for the synthesis of 3-[2-[4-((6-fluoro-1,2-benzisoxazol-3-y l)-1-piperidinyl)-6,7,8,9-tetrahydro-9-hydroxy-2-methyl-4H-pyrido[1,2-a]-pyrimidin -4-one (Paliperidone) and Paliperidone Palmitate through a novel intermediate 3-(2-chloroethyl)-6,7,8,9-tetrahydro-2-methyl-9-hydroxy-4H-pyrido[1,2-a]pyrimidin -4-one palmitate ester. A process for preparing a compound of formula VIII through a compound of formula VII is also provide.
提供一种合成3-[2-[4-((6-
氟-1,2-苯并
异噁唑-3-基)-1-
哌啶基)-6,7,8,9-四氢-9-羟基-2-甲基-4H-
吡啶并[1,2-a]-
嘧啶-4-酮(
帕利哌酮)和
帕利哌酮棕榈酸酯的过程,通过一种新颖的中间体3-(2-
氯乙基)-6,7,8,9-四氢-2-甲基-9-羟基-4H-
吡啶并[1,2-a]
嘧啶-4-酮
棕榈酸酯。还提供了一种通过化合物VII合成化合物VIII的方法。