Stereospecific synthesis of oximes and oxime ethers of 3-azabicycles: A SAR study towards antimicrobial agents.

Libraries of 1-methyl-2,4-diaryl-3-azabicyclo[3.3.1]nonan-9-ones/oximes/O-methyloximes 1-14/15-28/29-42 and 7-methyl-2,4-diaryl-3-azabicyclo[3.3.1]nonan-9-ones/oximes/O-methyloximes 43-48/49-54/55-60 were synthesized and their stereochemistry was established by 1D/2D NMR spectral and single crystal XRD studies. All the synthesized oximes and oxime ethers were screened for their in vitro antimicrobial activity against a panel of pathogenic bacteria (Bacillus subtilis, Staphylococcus aureus, Klebsiella pneumoniae and Pseudomonas aeruginosa) and fungi (Candida albicans, Candida parapsilosis, Aspergillus niger and Cryptococcus neoformans) using Gentamicin and Fluconazole as standards, respectively. From the SAR profile, the lead molecules were identified.