反应详情

1-(2-Fluorophenyl)-1-acetamido-2-propanone (3.13 g) and malononitrile (1.49 g) were dissolved in methanol (15 ml) and the solution was stirred under ice-cooling. Then, 55% aqueous solution of potassium hydroxide was added to the above solution to adjust to pH 10. The reaction mixture was then warmed and stirred at 55-60° C. for 0.5 hour. After cooling, the reaction mixture was poured into iced water and the resulting crystals were collected by filtration. This crude crystalline product was recrystallized from methanol-water and, further, from benzene to provide the title compound as colorless crystals (0.72 g). m.p. 117-118° C.

1. temperaturecooling
2. temperatureThe reaction mixture was then warmed
3. stirringstirred at 55-60° C. for 0.5 hour
4. temperatureAfter cooling
5. filtrationthe resulting crystals were collected by filtration
6. customThis crude crystalline product was recrystallized from methanol-water