1-(2-Hydroxyethyl)piperazine → 5-(4'phenoxyphenyl)-5-[N-(2-hydroxyethyl)piperazinyl]barbituric acid

Participants

Reaction Steps

A solution of 5-Bromo-5-(4′-phenoxyphenyl)barbituric Acid (50 mg) in 0.2 ml of methanol is added dropwise with a solution of N-(2-hydroxyethyl)piperazine (52 mg) in 0.6 ml of methanol and the mixture is stirred for 2 hours. The white precipitate is recovered by filtration and dried under vacuum at 60° C. overnight. 42.6 mg of the product are obtained, m.p. >240° C. 1H-NMR in d6-DMSO: 2.2-2.45 ppm (m, 6H); 2.55 ppm (m, 4H); 3.45 ppm (m, 2H); 4.4 ppm (t, 1H); 6.9-7.7 ppm (m, 9H); 11.6 ppm (s, 2H).

Provenance & Evidence