Stereocontrolled facile synthesis and antimicrobial activity of oximes and oxime ethers of diversely substituted bispidines |
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Authors: | Parthiban Paramasivam Kabilan Senthamaraikannan Ramkumar Venkatachalam Jeong Yeon Tae |
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Affiliation: | Department of Image Science and Engineering, Pukyong National University, Busan 608 739, Republic of Korea. |
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Abstract: | A small library of diversely substituted 2,4,6,8-tetraaryl-3,7-diazabicyco[3.3.1]nonan-9-ones, their oximes and O-methyloximes were achieved in a stereocontrolled manner by an easiest synthetic strategy as single isomers with high yields. Stereochemistry of all the synthesized compounds was established by their 1D/2D NMR spectral studies, further, witnessed by single-crystal XRD analysis. Accordingly, the compounds exist in a chair-boat conformation with equatorial orientation of the substituents in the chair part and boat-axial orientation in the boat part. Finally, all the synthesized oximes and oxime ethers were evaluated for their in vitro antimicrobial activity against a panel of pathogenic bacteria and fungi, and as a result of the structure-activity correlations, some lead molecules were known for further optimization. |
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