title: Synthesis and antibacterial activity of some new 2,3-dimethoxy-3-hydroxy-2-(1-phenyl-3-aryl-4-pyrazolyl)chromanones.
abstract: Seven new 2,3-dimethoxy-3-hydroxy-2-(1-phenyl-3-aryl-4-pyrazolyl)chromanones (5) have been synthesized by the oxidation of 3-hydroxy-2-(1-phenyl-3-aryl-4-pyrazolyl)chromones (4) with iodobenzene diacetate in methanol. The structures of compounds 5 were established by the combined use of (1)H NMR, IR and mass spectra. All the seven compounds (5) were tested in vitro for their antibacterial activity against gram-positive bacteria namely, Staphylococcus aureus, Staphylococcus epidermidis and Bacillus pumilus and two gram-negative bacteria namely, Salmonella typhi and Pseudomonas aeruginosa. Three compounds, 5d, 5f and 5g, have displayed antibacterial activity comparable to the commercial antibiotics, Linezolid, Cefaclor and Cefuroxime axetial.
authors.affiliation: Department of Chemistry, Kurukshetra University, Kurukshetra 136 119, India. dromprakash50@rediffmail.com
authors.forename: Om
authors.initials: O
authors.lastname: Prakash
authors.forename: Rajesh
authors.initials: R
authors.lastname: Kumar
authors.forename: Rakesh
authors.initials: R
authors.lastname: Sehrawat
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects*; D002867:Chromones / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D015195:Drug Design; D007462:Iodobenzenes / Q000737:chemistry; D000432:Methanol / Q000737:chemistry; D010084:Oxidation-Reduction
chemical_list: D000900:Anti-Bacterial Agents; D002867:Chromones; D007462:Iodobenzenes; C031905:iodobenzene; D000432:Methanol