反应详情

A mixture of 0.9 g (0.00232 mole) of 1,2-dihydro-6-methyl-2-oxo-5-[4-(4-phenyl-1-piperidinyl)phenyl]-3-pyridinecarboxamide, 1.8 g of P2O5, and 10 ml of dimethylformamide was refluxed for one hour, cooled to room temperature, and poured into 100 ml of water. The solution was adjusted to pH 6.7 with NH3 and the solid collected. After recrystallizing twice from MeOH (using charcoal treatment), 105 mg of a light brown solid was obtained. Approximately 80 mg of this solid was stirred overnight in 5 ml of saturated NaHCO3 (to which two drops of MeOH were added), then it was collected, washed, and dried. Sixty one mg of light brown solid was obtained.

1. temperaturewas refluxed for one hour
2. customthe solid collected
3. customAfter recrystallizing twice from MeOH (using charcoal treatment)