Urea → 5-(4-methylphenyl)pyrimidine-2,4,6(1H,3H,5H)-trione

Participants

Reaction Steps

To a solution of sodium (184 mg) in 12 ml of ethanol are added 0.95 ml of diethyl 2-(4-methylphenyl)malonate and 360 mg of urea, then the mixture is refluxed for 3 hours. A white solid separates, which is filtered and redissolved in 4 ml of water. The solution is acidified to pH=1-2 by adding 6 N hydrochloric acid, A white solid separates, which is collected by filtration, washed with 15 ml of water and dried under vacuum. 619 mg of the product are obtained. m.p. 271° C.

Provenance & Evidence