title: Biological activity of new aza analogues of quinolones.
abstract: A series of novel derivatives of 4H-pyrido[1,2-]pyrimidine, 1,4-dihydro-4-oxo-1,5-naphthyridine and 1,4-dihydro-4-oxo-1,6-naphthyridine were prepared and their biological activity was compared with that of nalidixic acid. The in vitro antibacterial activity of the tested compounds was lower than that of nalidixic acid except for two agents, 1b and 2c, with a higher activity against Enterococcus faecalis. The compounds were tested for their ability to cure four plasmids from two species of Enterobacteriaceae. The derivatives eliminated three plasmids (pKM101, pBR322, F'lac) at one-half or one-quarter of the minimal inhibitory concentration. Plasmid RP4 was unaffected by the treatment. None of these compounds showed better antichloroplast activity than nalidixic acid.
authors.affiliation: Institute of Cellular Biology, Comenius University, Bratislava, Slovakia.
authors.forename: A
authors.initials: A
authors.lastname: Belicová
authors.forename: M
authors.initials: M
authors.lastname: Seman
authors.forename: V
authors.initials: V
authors.lastname: Milata
authors.forename: D
authors.initials: D
authors.lastname: Ilavský
authors.forename: L
authors.initials: L
authors.lastname: Ebringer
mesh_terms: D000818:Animals; D000890:Anti-Infective Agents / Q000737:chemistry / Q000494:pharmacology*; D001372:Aza Compounds / Q000737:chemistry / Q000494:pharmacology*; D004755:Enterobacteriaceae / Q000187:drug effects; D005056:Euglena gracilis / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D009268:Nalidixic Acid / Q000494:pharmacology; D010957:Plasmids / Q000187:drug effects; D018087:Plastids / Q000187:drug effects; D015363:Quinolones / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D000890:Anti-Infective Agents; D001372:Aza Compounds; D015363:Quinolones; D009268:Nalidixic Acid