2-Methylindole → HCID 22398526, Verbindung

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

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.

Herkunft & Nachweise