反应详情

A solution of 50.5 g. of 4-(15-carbomethoxypentadecylamino)benzoic acid and 34.4 ml. of boron trifluoride etherate in 200 ml. of methanol is stirred under reflux for 4 hours, allowed to cool, and is poured into 1.20 liters of ice cold 5% aqueous sodium carbonate solution. The white solid is collected by filtration and recrystallized from benzene-ethanol to yield methyl 4-(15-carbomethoxypentadecylamino)benzoate, m.p. 92°-93° C.

1. temperatureunder reflux for 4 hours
2. temperatureto cool
3. filtrationThe white solid is collected by filtration
4. customrecrystallized from benzene-ethanol