Aminohydantoin誘導体並びにその関連化合物に関する研究 (第1報)

1-Aminohydantoinに就いて

抄録

1-Aminohydantoin hydrochloride was neutralized with alkali carbonate, evaporated to dryness, and the residue treated with hot alcohol by which 1-aminohydantoin was isolated in a free state as colorless needle crystals, m. p. 193°. Ethyl N¹-carbamido-N²-benzylidenehydrazinoacetate, m. p. 154-155°, obtained by the application of benzaldehyde to ethyl N¹-carbamidohydrazinoacetate was found to undergo cyclization with acid or alkali to form N¹-benzylidene-1-aminohydantoin.