title: Organoiodine(III) mediated synthesis of 3,9-diaryl- and 3,9-difuryl-bis-1,2,4-triazolo[4,3-a][4,3-c]pyrimidines as antibacterial agents.
abstract: Nine 3,9-diaryl- and 3,9-difuryl-bis-1,2,4-triazolo[4,3-a][4,3-c]pyrimidines (3a-i) have been synthesized by the oxidation of bis-2,4-pyrimidinylhydrazones of various araldehydes and furfural with 2equiv of iodobenzene diacetate (IBD) in dichloromethane and tested in vitro for their antibacterial activity. Three compounds, namely 3,9-di-(4'-fluorophenyl)-bis-1,2,4-triazolo[4,3-a][4,3-c]pyrimidine (3f), 3,9-di-(4'-nitrophenyl)-bis-1,2,4-triazolo[4,3-a][4,3-c]pyrimidine (3g) and 3,9-di-(5'-nitro-2'-furyl)-bis-1,2,4-triazolo[4,3-a][4,3-c]pyrimidine (3i), were associated with substantially higher antibacterial activity than some commercial antibiotics against Gram-positive bacteria namely Staphylococcus aureus, Staphylococcus epidermidis and Bacillus subtilis; two Gram-negative bacteria namely Salmonella typhi and Escherichia coli at MIC (minimum inhibitory concentration) 10microg/ml.
authors.affiliation: Department of Chemistry, Kurukshetra University, Kurukshetra 136119, India. dromprakash50@rediffmail.com
authors.forename: Om
authors.initials: O
authors.lastname: Prakash
authors.forename: Rajesh
authors.initials: R
authors.lastname: Kumar
authors.forename: Ravi
authors.initials: R
authors.lastname: Kumar
authors.forename: Prikshit
authors.initials: P
authors.lastname: Tyagi
authors.forename: R C
authors.initials: RC
authors.lastname: Kuhad
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects; D002384:Catalysis; D007455:Iodine / Q000737:chemistry*; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D011743:Pyrimidines / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology* / Q000506:poisoning
chemical_list: D000900:Anti-Bacterial Agents; D011743:Pyrimidines; D007455:Iodine