反应详情

温度

100 °C

A suspension of 6-bromo-4-hydroxycarbostyril (2.23g, 0.0093 mole) in glacial acetic acid (15 ml) was swirled during the addition of concentrated nitric acid (2.5 ml, d, 1.42). On heating at 100° C for several minutes a thick yellow solid separated. After cooling, ethanol (40 ml) was added and the mixture filtered and the solid washed free of nitric acid with ethanol. Drying in vacuo over P2O5 gave the title compound, m.p. 231°-4° C (d). (Found; C, 37.83; H, 1.74; N, 9.77; Br, 28.33; C9H5N2BrO4 requires; C, 37.92; H, 1.77; N, 9.83; Br, 28.03%).

1. customseparated
2. temperatureAfter cooling
3. additionethanol (40 ml) was added
4. filtrationthe mixture filtered
5. washthe solid washed free of nitric acid with ethanol
6. dry with materialDrying in vacuo over P2O5