反应详情

A solution of 1 g of 2-hydroxy-5,6,7,8-tetrahydroquinazoline and 0.1 g of diethylaniline in 10 mL of phosphorus oxychloride is refluxed for 2 h, and subsequently cooled and concentrated. The residue is taken up in chloroform and washed with excess 3 N NaOH solution. The organic layer is dried and concentrated to provide 2-chloro-5,6,7,8-tetrahydroquinazoline (1.1 g) as an orange solid.

1. temperaturesubsequently cooled
2. concentrationconcentrated
3. washwashed with excess 3 N NaOH solution
4. customThe organic layer is dried
5. concentrationconcentrated