Design, synthesis and in vitro microbiological evaluation of 6,6-dimethyl-7,9-diaryl-1,2,4,8-tetraazaspiro[4.5]decan-3-thiones - A new series of ‘tailor-made’ compounds

Abstract

Some novel ‘tailor-made’ compounds, 6,6-dimethyl-7,9-diaryl-1,2,4,8-tetraazaspiro[4.5]decan-3-thiones 23–27 have been studied for their in vitro antibacterial activity against Staphylococcus aureus, β-Heamolytic streptococcus, Vibreo cholerae, Salmonella typhii, Shigella felxneri, Escherichia coli, Klebsiella pneumonia, Pseudomonas aeruginosa and anti-fungal activity against Aspergillus flavus, Mucor, Rhizopus and Microsporum gypsuem. Compounds 24 and 25 exerted potent antibacterial activity against S. aureus, β-H. streptococcus, E. coli and P. aeruginosa whereas all compounds 23–27 exerted strong in vitro antifungal activity against A. flavus, Mucor and Rhizopus.

Keywords::

• 6
• 6-dimethyl-7
• 9-Diaryl-1
• 2
• 4
• 8-tetraazaspiro[4.5]decan-3-thiones
• m-Chloroperbenzoic acid
• Synthesis
• Antibacterial activity
• Antifungal activity

Acknowledgements

Authors are thankful to NMR Research Centre, Indian Institute of Science, Bangalore for recording spectra. Two of our authors namely J.Thanusu and V.Kanagarajan are highly thankful for Annamalai University authorities for providing financial support in the form of Research Fellowship.

Declaration of interest: The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.