Reference

2,4-Imidazolidinedione

2,4-Imidazolidinedione. (Sumitomo Chemical Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 60008269 A2 17 Jan 1985 Showa, 4 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: ICM: C07D233-74. APPLICATION: JP 83-117807 28 Jun 1983. DOCUMENT TYPE: Patent CA Section: 28 (Heterocyclic Compounds (More Than One Hetero Atom)) The title compd. (I) was prepd. by Bucherer-Bergs reaction of CH2O or HOCH2CN (II) in the presence of free ammonia. Thus, autoclaving 57 g II, 71.3 g (NH2)2CO3×H2O, 102 g 25% NH4OH in H2O/MeOH at 70° for 4 h gave, after treatment with 20% H2SO4, 48.2 g I of 95% purity.

N-H stretching vibrations of hydantoin (2,4-imidazolidinedione), its derivatives and related compounds

N-H stretching vibrations of hydantoin (2,4-imidazolidinedione), its derivatives and related compounds. Kimura, Takashi; Nagao, Yoshitaka (Department of Materials Science and Technology, Hirosaki University, Japan). Bulletin of the Faculty of Science and Technology, Hirosaki University, 5(2), 11-13 (English) 2003 Hirosaki University, Faculty of Science and Technology. CODEN: BFHUFC. ISSN: 1344-2139. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) Two N-H stretching vibration signals on hydantoin (2,4-Imidazolidinedione)and its derivs. were measured in dichloromethane solns. Two signals were assigned by comparing their frequencies with ones of analog compds., succinimides and 2-oxazolidones and/or monosubstituted hydantoins.