反应详情

8-Hydroxy-2-methyl-4(3H)-quinazolinone (0.01 mol) and phosphorus oxychloride (10 mL) were heated under reflux for 30 min. The excess phosphorus oxychloride was removed under reduce pressure and the residue was added to a mixture of ice (50 g) and water (50 ml), and the pH adjusted to 6 (aqueous ammonia). 4-Chloro-8-hydroxy-2-methyl-quinazoline (A2) was isolated via filtration.

1. temperatureunder reflux for 30 min
2. customThe excess phosphorus oxychloride was removed
3. additionthe residue was added to a mixture of ice (50 g) and water (50 ml)