反应详情

23.4 gms (0.109 mole) of 2-acetamido-6-bromopyridine was dissolved in 200 ml. of glacial acetic acid containing 27.6 ml (0.218 mole) of 7.9M peracetic acid and the solution was heated at 70° C for 2 hours and at 55° C for 19 hours. The reaction mixture was diluted with 1600 ml water and the solution was then concentrated in vacuo to 550 ml. 8.6% of unreacted-2-acetamido-6-bromopyridine was removed by filtration. The solvent was evaporated from the filtrate giving an 83% yield of impure 2-acetamido-6-bromopyridine-1-oxide which was purified by treatment with activated charcoal to remove the yellow impurity and subsequently recrystallized from 2-propanol. A second recrystallization from 2-propanol gave fine white needles, m.p=180.0°-180.5° C.

1. concentrationthe solution was then concentrated in vacuo to 550 ml
2. custom8.6% of unreacted-2-acetamido-6-bromopyridine was removed by filtration
3. customThe solvent was evaporated from the filtrate