反应详情

A solution of 3,5-dichloro-1-methyl-2(1H)-pyrazinone (7.16 g, 0.040 mol) in dioxane (120 mL) was treated with a concentrated aqueous solution of ammonia (28%, 16 mL, 0.24 mol). After stirring at room temperature for three days a suspension of solid had formed. The solid was collected, rinsed with a little water, ether, and hexanes and air dried. The product, 3-amino-5-chloro-1-methyl-2(1H)-pyrazinone, was obtained as a white crystalline powder (4.81 g) melting above 250° C.

1. additiona suspension of solid
2. customhad formed
3. customThe solid was collected
4. washrinsed with a little water, ether, and hexanes and air
5. customdried