5,5-Diphenylhydantoin → HCID 20840385, compound

Participants

Reaction Steps

5,5-diphenylhydantoin, 25.2 g (0.1 mole), was added to a solution of 2.3 g (0.1 mole) of sodium in 300 ml of anhydrous ethanol and the suspension was heated under reflux for half an hour. 4-phenyl-1-(3-chloropropyl)piperazine, (23.9 g, 0.1 mole) slowly was added to the suspension and the mixture was heated under reflux with stirring for 16 hours. The solvent was removed in vacuo, the concentrate was suspended in water, and the free base was extracted with chloroform. The dried extracts were concentrated in vacuo to an oil. The oil was dissolved in hot methanol and 14 g (0.12 mole) of maleic acid was added. The hot solution was filtered and the filtrate was cooled. The resulting solid was collected and recrystallized from an aqueous-methanol solution.

Provenance & Evidence