反应详情

A stirred mixture of 6-fluoro-3-(4-piperidinyl)-1,2-benzisoxazole (1.88 g, 8.5 mmol), K2CO3 (1.8 g) and 1-[4-(3-bromopropoxy)-3-methylmercaptophenyl]ethanone (2.3 g, 7.6 mmol) in acetonitrile (100 ml) was heated at reflux for 4 hours. At the end of the reaction, the solvent was concentrated, then diluted with dichloromethane (250 ml). The insolubles were filtered off. The dichloromethane solution was concentrated to dryness as an oil. Purification was effected by flash chromatography on a silica gel column (SiO2, 54 g, eluted with dichloromethane, 500 ml; 1% methanol-dichloromethane, 1.1 l). The purest fractions were combined to give a colorless oil which solidified to an off-white solid (2.4 g). Recrystallization from ethanol (100 ml) yielded 1-[4-[3-[4-(6-fluoro-1,2-benzoisoxazol-3-yl]-1-piperidinyl]propoxy]-3-methylmercaptophenyl]ethanone as off-white needle crystals, 2.15 g, m.p.=150°-152° C.

1. temperaturewas heated
2. temperatureat reflux for 4 hours
3. customAt the end of the reaction
4. concentrationthe solvent was concentrated
5. additiondiluted with dichloromethane (250 ml)
6. filtrationThe insolubles were filtered off
7. concentrationThe dichloromethane solution was concentrated to dryness as an oil
8. customPurification
9. washwas effected by flash chromatography on a silica gel column (SiO2, 54 g, eluted with dichloromethane, 500 ml; 1% methanol-dichloromethane, 1.1 l)
10. customto give a colorless oil which
11. customRecrystallization from ethanol (100 ml)