title: Synthesis, stereochemistry and antimicrobial studies of novel oxime ethers of aza/diazabicycles.
abstract: Two series of bicyclic oxime ethers viz, 2,4-diaryl-3-azabicyclo[3.3.1]nonan-9-one O-benzyloximes 13-24 and 2,4,6,8-tetraaryl-3,7-diazabicyclo[3.3.1]nonan-9-one O-benzyloximes 31-36 were synthesized and stereochemistry was established by their spectral (1D and 2D NMR) and crystal studies. Synthesized oxime ethers were screened for their in vitro antimicrobial activity against a set of pathogenic bacteria (Pseudomonas aeruginosa, Staphylococcus aureus, Salmonella typhi, Escherichia coli and Klebsiella pneumoniae) and fungi (Candida albicans, Candida-51, Rhizopus sp., Aspergillus niger and Aspergillus flavus) by twofold serial dilution method, respectively, using Ciprofloxacin and Amphotericin B as standards. Most of the molecules expressed promising antimicrobial profile against the tested pathogens and even a few compounds 16, 21, 22, 33 and 34 were better than standard drugs.
authors.affiliation: Department of Chemistry, Annamalai University, Annamalainagar 608 002, India.
authors.forename: Paramasivam
authors.initials: P
authors.lastname: Parthiban
authors.forename: Gopalakrishnan
authors.initials: G
authors.lastname: Aridoss
authors.forename: Paramasivam
authors.initials: P
authors.lastname: Rathika
authors.forename: Venkatachalam
authors.initials: V
authors.lastname: Ramkumar
authors.forename: Senthamaraikannan
authors.initials: S
authors.lastname: Kabilan
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D000935:Antifungal Agents / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D001419:Bacteria / Q000187:drug effects; D001643:Bridged Bicyclo Compounds / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D004987:Ethers / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D005658:Fungi / Q000187:drug effects; D010091:Oximes / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology
chemical_list: D000900:Anti-Bacterial Agents; D000935:Antifungal Agents; D001643:Bridged Bicyclo Compounds; D004987:Ethers; D010091:Oximes