Reacción #2271679
ord-b7f5ae86b09e4710a0e64cd9338851c2
Ecuación de reacción
Reactantes
Reactivos
Disolventes
Condiciones de reacción
Tratamiento posterior
- 1OtroAt the end of the reaction
- 2Concentraciónthe solvent was concentrated down to about 30 ml
- 3Otropartitioned between water (200 ml) and dichloromethane (300 ml)
- 4OtroThe dichloromethane solution was separated
- 5Lavadowashed with water and brine
- 6Secadodried over MgSO4
- 7OtroThe crude product from the evaporated solution was purified by flash chromatography over a silica gel column (SiO2, 60 g, eluted with 1% methanol in dichloromethane, 600 ml; 2% methanol in dichloromethane, 600 ml)
- 8OtroThe material thus obtained
Procedimiento
A stirred mixture of 6-fluoro-3-(4-piperidinyl)-1,2-benzisoxazole hydrochloride (3.0 g; 11.7 mmol). K2CO3 (3.0g), and 1-[4-(3-bromopropoxy)-3-methylphenyl]ethanone (3.19 g) in dimethylformamide (20 ml) and acetonitrile (50 ml) was heated at 95° C. for 4 hours. At the end of the reaction, the solvent was concentrated down to about 30 ml, then partitioned between water (200 ml) and dichloromethane (300 ml). The dichloromethane solution was separated and washed with water and brine, then dried over MgSO4. The crude product from the evaporated solution was purified by flash chromatography over a silica gel column (SiO2, 60 g, eluted with 1% methanol in dichloromethane, 600 ml; 2% methanol in dichloromethane, 600 ml). The material thus obtained was a light yellow oil, weight: 2.07 g (43%). This oil was dissolved in ethanol and treated with a solution of fumaric acid (585 mg) in ethanol. The 1-[4-[3-[4-(6-fluoro-1,2-benzisoxazole-3-yl)-1-piperidinyl]propoxy]-3-methylpheny]ethanone hemifumarate crystals formed on cooling at 0° C. This was collected and weighed 1.5 g., m.p.=185°-187° C.