反应详情

温度

0 °C

The product obtained in Step 4 (7.0 g, 31.5 mmol) and 2 mol/L H2SO4 solution (200 mL) were heated to reflux for 6 h. Then the reaction mixture was cooled to 0° C., filtered, washed with water, concentrated under vacuum and dried to obtain a product (4.0 g, 70%).

1. temperatureto reflux for 6 h
2. filtrationfiltered
3. washwashed with water
4. concentrationconcentrated under vacuum
5. customdried