| abstract |
The present invention relates to an improved process for the preparation of pure Paliperidone of formula (I). The present invention more specifically provides an improved process for the preparation of pure Paliperidone which may contain impurities in the acceptable level of pharmacopoeia requirement specifically 3-{2-[4-(5-Fluoro-benzo[d]isoxazol-3-yl]-piperidin-1-yl]-ethyl}-2- methyl-7,8-dihydro-6H-pyrido[1,2-a]pyrimidine-4,9-dione of Formula (IV). |