Potassium Carbonate → 1-[2-[3-[4-(6-Fluoro-1,2-benzisoxazol-3-yl)1-piperidinyl]propoxy]-5-methylphenyl]ethanone

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A mixture of 6-fluoro-3-(4-piperidinyl)-1,2-benzisoxazole hydrochloride (2.87 g, 11.23 mmol), K2CO3 (2.5 g), 1-[2-(3-bromopropoxy)-5-methylphenyl]ethanone (3.74 g, 13.8 mmol) in dimethylformamide (10 ml) and acetonitrile (.50 ml) was heated at 95° C. for 6 hours. At the end of the reaction, the solvent was concentrated and the mixture was extracted into dichloromethane (300 ml). The organic solution was washed with water and brine, dried over MgSO4, then concentrated down to a crude oil. The purification was done by flash chromatography over a silica gel column (SiO2, 60 g, eluted with 1% CH3OH:dichloromethane: 1.2 l; 3% CH3OH:dichloromethane: 600 ml). The material thus obtained was crystallized from a small volume of ether and hexane to provide 2.13 g (46%) of off-white 1-[2-[3-[4-(6-fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]propoxy]-5-methylphenyl]ethanone, m.p.=92°-93° C.

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