Hydrochloric Acid → (4,6-Dimethylpyrimidin-2-yl)cyanamide

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A mixture of 42 g (0.5 mol) of cyanoguanidine ("dicyanodiamide") and 50 g (0.5 mol) of 2,4-pentanedione ("acetylacetone") is heated to 120° C. for 15 hours. The reaction mixture is then cooled, after which 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 during this procedure is isolated by filtering it off under suction. 51.8 g (70% of theory) of 2-cyanoamino-4,6-dimethyl-pyrimidine of melting point 205° C. are obtained.

Herkunft & Nachweise