反应详情

A suspension of 4-pyridinecarboxylic acid-1-oxide (3.74 g, 26.9 mmol) and 1,1'-Carbonyldiimidazole (4.80 g, 29.6 mmol) in dry dimethylformamide (50 ml) was stirred for 40 minutes under an air-lock and treated with 3,4-dichlorobenzenamine (4.79 g, 29.6 mmol). The reaction mixture was heated at 100° for 5.3 hours and cooled to room temperature. The solution was evaporated in vacuo and the residue triturated with ethanol (80 ml) to give the title compound (5.38 g), m.p. 259°-265°.

1. temperatureThe reaction mixture was heated at 100° for 5.3 hours
2. customThe solution was evaporated in vacuo
3. customthe residue triturated with ethanol (80 ml)