反应详情

22.9 g (0.1 mole) of 1-nitro-5-methyl-5,6-dihydropyrazolo[1,5-c]quinazoline is boiled with 120 ml of acetic anhydride for 1 hour, then the solution obtained is poured into water. The product that solidifies is filtered off, washed with water and dried. Thus, 25.0 g (83%) of 1-nitro-5-methyl-6-acetyl-5,6-dihydropyrazolo[1,5-c]quinazoline are obtained. M.p.: 149°-150° C.

1. customthe solution obtained
2. filtrationThe product that solidifies is filtered off
3. washwashed with water
4. customdried