反应详情

A mixture of 3-amino-2-[3-[(E)-2-(4-pyridyl)vinyl]phenylamino]pyridine (575 mg) and 3-(3-pyridyl)pyruvic acid (0.37 g) in ethanol (10 ml) was stirred under reflux for 1.5 hours. After evaporation of the solvent, the residue was chromatographed on silica gel column (chloroform-methanol, 9:1) and crystallized from ethanol to give 2-(3-pyridylmethyl)-4-[3-[(E)-2-(4-pyridyl)vinyl]phenyl]-3-oxo-3,4-dihydropyrido[2,3-b]pyrazine (395 mg)

1. temperatureunder reflux for 1.5 hours
2. customAfter evaporation of the solvent
3. customthe residue was chromatographed on silica gel column (chloroform-methanol, 9:1)
4. customcrystallized from ethanol