To a solution consisting of 5-(3-chloropropyl)-6,7-dihydro-3-phenyl-1,2-benzisoxazol-4(5H)-one (5.02 g) and DMF (170 ml) was added diisopropylethyl amine (7.50 ml), 4-(4-chlorophenyl)-4-hydroxypiperidine (4.03 g) and sodium iodide (2.59 g) at room temperature with stirring. The reaction was flushed with nitrogen and warmed to 78°-80° C. for 11 hours. Upon cooling to room temperature, water and ethyl acetate were added to the reaction mixture. The layers were separated and the aqueous layers extracted three times with ethyl acetate. The combined organic layers were washed with brine and dried (MgSO4). Filtration and concentration gave the crude amine product. Purification via flash chromatography (silica gel, 2% Et3N/ether) afforded 2.60 g of the desired product as an oil. Addition of ether, heat, and slow evaporation gave a powder. The ether was then decanted and the powder was washed with pentane to yield 5-[3-(4-(4-chlorophenyl)-4-hydroxy-piperidinyl)-propyl]-6,7-dihydro-3-phenyl-1,2-benzisoxazol -4(5H)-one, m.p. 147°-148° C.
