反应详情

温度

50 °C

To a slurry of 106.5 g of 2,6-dinitrobenzoic acid in 1000 ml of toluene was added with stirring 133.2 g of diisobutylamine. Next 44.9 g of phosphorus oxychloride was added dropwise at such a rate to maintain the temperature below 40° C. The mixture was heated to 50° C. for 12 hrs and poured into 500 ml of aqueous 5% NaHCO3 solution with stirring. The organic layer was separated, washed with 500 ml water, and the toluene removed under reduced pressure. The remaining solid was recrystallized from hot ethanol to give 105.2 g of N,N-diisobutyl-2,6-dinitrobenzamide, a yellow solid, mp 97°-99° C.

1. temperatureto maintain the temperature below 40° C
2. customThe organic layer was separated
3. washwashed with 500 ml water
4. customthe toluene removed under reduced pressure
5. customThe remaining solid was recrystallized from hot ethanol