title: Synthesis, antimicrobial, and mosquito larvicidal activity of 1-aryl-4-methyl-3,6-bis-(5-methylisoxazol-3-yl)-2-thioxo-2,3,6,10b-tetrahydro-1H-pyrimido[5,4-c]quinolin-5-ones.
abstract: A series of 1-aryl-4-methyl-3,6-bis-(5-methylisoxazol-3-yl)-2-thioxo-2,3,6,10b-tetrahydro-1H-pyrimido[5,4-c]quinolin-5-ones (6a-h) have been synthesized by cyclization of ethyl-3-aryl-4-(2-chlorophenyl)-6-methyl-1-(5-methylisoxazol-3-yl)-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylates 4a-h with 3-amino-5-methylisoxazole 5. Compounds 4a-h were obtained by Biginelli reaction, by condensation of aromatic aldehyde 1, ethyl acetoacetate 2, and isoxazolyl thioureas 3 in a one-pot reaction catalyzed by ceric ammonium nitrite (CAN). Compounds 6a-h were tested for their antibacterial and antifungal activities against various bacterial and fungal strains. The results showed that these compounds exhibited good antibacterial and antifungal activity compared with that of standard antibiotics. Mosquito larvicidal activity of the newly synthesized compounds 6a-h is also studied against fourth instar larvae Culex quinquefasciatus. Some of the compounds are proved to be lethal for mosquito larvae.
authors.affiliation: Department of Chemistry, Kakatiya University, Warangal, AP, India. eligeti_rajan@yahoo.co.in
authors.forename: E
authors.initials: E
authors.lastname: Rajanarendar
authors.forename: M Nagi
authors.initials: MN
authors.lastname: Reddy
authors.forename: K Rama
authors.initials: KR
authors.lastname: Murthy
authors.forename: K Govardhan
authors.initials: KG
authors.lastname: Reddy
authors.forename: S
authors.initials: S
authors.lastname: Raju
authors.forename: M
authors.initials: M
authors.lastname: Srinivas
authors.forename: B
authors.initials: B
authors.lastname: Praveen
authors.forename: M Srinivasa
authors.initials: MS
authors.lastname: Rao
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D000890:Anti-Infective Agents / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D000935:Antifungal Agents / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects*; D001424:Bacterial Infections / Q000188:drug therapy; D003465:Culex / Q000187:drug effects; D009033:Culicidae / Q000187:drug effects*; D005658:Fungi / Q000187:drug effects*; D006801:Humans; D007555:Isoxazoles / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D007814:Larva / Q000187:drug effects*; D008826:Microbial Sensitivity Tests; D009181:Mycoses / Q000188:drug therapy; D011743:Pyrimidines / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D015363:Quinolones / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*
chemical_list: D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D000935:Antifungal Agents; D007555:Isoxazoles; D011743:Pyrimidines; D015363:Quinolones