反应详情

温度

-2.5 °C

3-Amino-4-bromo-6-methoxyquinoline (18.4 g, 0.0727 mole) was dissolved in dry THF (250 mL) and the solution was cooled to −8° C. (EtOH-ice bath). Nitrosonium tetrafluoroborate (9.34 g, 0.08 mole) was added in portions over 10 min, keeping the temperature less than −2° C. The mixture was stirred at −5 to 0° C. for 30 min, then the yellow precipitate was filtered off and washed sequentially with cold THF and hexane. Drying in vacuo gave the title compound (19.4 g, 76%) an insoluble orange-yellow solid.

1. customthe temperature less than −2° C
2. filtrationthe yellow precipitate was filtered off
3. washwashed sequentially with cold THF and hexane
4. customDrying in vacuo