反应详情

A solution of 2-(2-oxopropyl)-4H-3,1-benzoxazin-4-one (68.2 g, 0.34 mol) and 2-hydrazinopyridine (37.1 g, 0.34 mol) in ethanol (500 mL) was heated under reflux for 1 hour. After the solution was cooled to room temperature, the resulting crystals were collected by filtration. The crystals were washed with ethanol and air dried to give the title compound (50.2 g, 51% yield).

1. temperatureunder reflux for 1 hour
2. filtrationthe resulting crystals were collected by filtration
3. washThe crystals were washed with ethanol and air
4. customdried