反应详情

温度

0 °C

The pyrazole from (a) above (3.1 g; 0.028, moles) was dissolved in cold sulfuric acid (15 mL), cooled to 0° C., and then treated with fuming nitric acid (12 mL). The acidic solution was heated on a steam bath for 2 hours, cooled to room temperature, and poured over ice. The solution was made basic (pH=12) and the precipitate was collected by filtration and washed with water. Yield: 2.3 g (53%), white solid.

1. temperatureThe acidic solution was heated on a steam bath for 2 hours
2. temperaturecooled to room temperature
3. additionpoured over ice
4. filtrationthe precipitate was collected by filtration
5. washwashed with water