US8940749B2 - Preparation of 3-[2-[4-((6-Fluoro-1, 2-Benzisoxazol-3-Yl)-L-Piperidinyl)-6, 7, 8, 9-Tetrahydor-9-Hydroxy-2-Methyl-4h-Pyrido[ 1, 2-A]-Pyrimidin-4-One(paliperidone) and Paliperidone Palmitate