Three series of oxime ethers viz, 2, 6-diarylpiperidin-4-one O-benzyloximes 5a–o, 2, 6- diaryltetrahydropyran-4-one O-benzyloximes 7a–e and 2, 6-diaryltetrahydrothiopyran-4-one O-benzyloximes 11a–b and 12a–c were synthesized and stereochemistry is established by their spectral and single crystal analysis. A SAR study has been carried out for the above oxime ethers against a panel of antibacterial (Pseudomonas aeruginosa, Staphylococcus ...