反应详情

温度

120 °C

A mixture of 42 g (0.5 mol) of cyanoguanidine ("dicyanodiamide") and 50 g (0.5 mol) of pentane-2,4-dione ("acetylacetone") is heated to 120° C. for 15 hours. Thereafter, after the reaction mixture has been cooled, 500 ml of water are added and the solution is acidified with hydrochloric acid at 0° C. to 10° C. The product obtained in crystalline form in this procedure is isolated by being filtered off under suction. 51.8 g (70% of theory) of 2-cyanoamino-4,6-dimethyl-pyrimidine of melting point 205° C. are obtained.

1. temperatureThereafter, after the reaction mixture has been cooled
2. customThe product obtained in crystalline form in this procedure
3. customis isolated
4. filtrationby being filtered off under suction