反应详情

温度

50 °C

A mixture of formic acid (20 g.) and acetic anhydride (41.3 g.) was stirred for 30 minutes at 50° C. and thereto was added methyl 4-amino-2-pyridinecarboxylate (11 g.) at ambient temperature, and then the mixture was stirred for 2 hours at 70°-75° C. After the removal of the solvent from the reaction mixture, the residue was recrystallized from ethanol (160 ml.) to give a pale yellow powder of methyl 4-formamido-2-pyridinecarboxylate (8.3 g.), mp. 185° to 186.5° C.

1. stirringthe mixture was stirred for 2 hours at 70°-75° C
2. customAfter the removal of the solvent from the reaction mixture
3. customthe residue was recrystallized from ethanol (160 ml.)