反应详情

温度

-20 °C

To a solution of 2-methylindole (130 mg) in THF (2 mL) stirred under argon cooled on dry ice/acetone was added n-butyl lithium (2M in pentane, 1.6 mL). After 2 minutes, potassium tert-butoxide (1M in THF, 2 mL) was added and the mixture was allowed to warm to approximately −20° C. After 5 minutes, precipitate was noted and the mixture was cooled to −70° C. 4-(5-Fluoro-2-methoxyphenyl)-4-methylpentan-2-one (Example 17) (440 mg) in THF (1.5 mL) was added all at once. The cooling bath was removed and the mixture was stirred for 10 minutes and then quenched with EtOH (0.5 mL). The mixture was diluted with EtOAc, washed with water, dried, filtered, and evaporated. Chromatography over silica gel (EtOAc-hexanes (1:9)) gave product which solidified on trituration with hexanes-ether. The solid was recrystallized from ether-hexanes, collected by filtration and dried under vacuum to give 0.11 g of the title compound, m.p. 118° C.-120° C.

1. temperaturecooled on dry ice/acetone
2. waitAfter 5 minutes
3. temperaturethe mixture was cooled to −70° C
4. customThe cooling bath was removed
5. customquenched with EtOH (0.5 mL)
6. additionThe mixture was diluted with EtOAc
7. washwashed with water
8. customdried
9. filtrationfiltered
10. customevaporated
11. customChromatography over silica gel (EtOAc-hexanes (1:9)) gave product which
12. customThe solid was recrystallized from ether-hexanes
13. filtrationcollected by filtration
14. customdried under vacuum