反应详情

To a solution of 6-bromo-5-methyl-1,4-dihydro-benzo[d][l,3]oxazin-2-one (0.726 g, 3 mmol) in concentrate H2SO4 (4 mL), KNO3 (0.303 g, 3 mmol) was added at 0° C. Reaction mixture stirred 14 hours and poured over crushed ice. Yellow precipitate was obtained, which was filtered and dried.

1. customReaction mixture
2. additionpoured
3. customover crushed ice
4. customYellow precipitate was obtained
5. filtrationwhich was filtered
6. customdried