PREPARATION OF 3-2-4-((6-FLUORO-1, 2-BENZISOXAZOL-3-YL)-L-PIPERIDINYL)-6, 7, 8, 9-TETRAHYDRO-9-HYDROXY-2-METHYL-4H-PYRIDO 1, 2-A-PYRIMIDIN-4-ONE (PALIPERIDONE) AND PALIPERIDONE PALMITATE.

摘要

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.