NotesY ol. 8 N,N '-Bi%5,5-dimethyl-3-hydantoinylinethyl)piperazÍTHi, gave an 85% yield and liad m.p. 24.8-249°dec. . Caled, for CkH^XcO*: N, 22.94. Found: N, 22.87.X,N'-Bis(5,5-diphenyl-3-hydantoinylmethyl ipiperazine gave a 75' ,' yield and had m.p. 252-254°dec. Anal. Caled, for CseFIiiNeOj: X. 13.sS. Found: X, 14.1)3.Hydroxymethyl-5,5-Dimethylhydantoin.12 This compound was commercially available and, after recrystallization from benzene-ethanol, melted at 117-119°.Reaction of Hydroxymethyl-5,5-dimethylhydantoin with Amines.-To a solution of 15.8 g. (0.1 mole) of hydroxvmethyl-5.5-dimetliylhydantoin in 15 ml. of warm ethanol was added slowly and with shaking 9.3 g. (0.1 mole) of aniline. The mixture was refluxed 1 hr., filtered, and cooled. Recrystallization from ethanol yielded 15 g. (64%) of N-3-anilinomethyl-5.5dimethylhydantoin, m.p. 154-155°. Anal. Caled, for CisHtóXsOi•: N, 18.02. Found: N, 18.08.A mixture melting point of this product with that prepared from 5,5-dimethylhydantoin, formaldehyde, and aniline by the general procedure described above (see Table I) was 153-154°; the infrared spectra of the two compounds were identical.Similarly 0.1 mole of hydroxymethyl-5,5-diinethylhydantoin
