title: N-monocarbamoyl derivatives of symmetrical diamines with antiviral activity.
abstract: Some new N-monocarbamoyl symmetrical diamines have been prepared by the addition of symmetrical amines to isocyanates or isothiocyanates. 2,6-Diaminopyridine (1), (1R,2R)-1,2-diaminocyclohexane [(1R,2R)-2], meso-1,2-diaminocyclohexane (meso-2), or (1R,2R)-1,2-diphenylethylenediamine (3) were used as the starting symmetrical diamine frameworks. All of the newly synthesized compounds were subjected to an evaluation of antiviral activity with herpes simplex virus (HSV)-1. N-Monocarbamoyl 2,6-diaminopyridines (5a, b) showed significant antiviral activity (EC(50)=17.0, 6.2 microg/ml) comparable to that of N-monododecanoyl 2,6-diaminopyridine (A2). As a result, compound 5a showed a better selectivity index (CC(50)/EC(50) = ca. 10.0) than that of A2.
authors.affiliation: Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan.
authors.forename: Nobuko
authors.initials: N
authors.lastname: Mibu
authors.forename: Kazumi
authors.initials: K
authors.lastname: Yokomizo
authors.forename: Takeshi
authors.initials: T
authors.lastname: Miyata
authors.forename: Kunihiro
authors.initials: K
authors.lastname: Sumoto
mesh_terms: D000631:Aminopyridines / Q000138:chemical synthesis* / Q000494:pharmacology*; D000998:Antiviral Agents / Q000138:chemical synthesis* / Q000494:pharmacology*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004121:Dimethyl Sulfoxide; D015497:HIV-1 / Q000187:drug effects; D006801:Humans; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy; D012997:Solvents; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D010948:Viral Plaque Assay