Synthesis and study of antibacterial and antifungal activities of novel 8-methyl-7,9-diaryl-1,2,4,8-tetraazaspiro[4.5]decan-3-thiones

Some novel spiropiperidinyl-1,2,4-triazolidin-3-thiones have been synthesized and studied for their antibacterial activity against Staphylococcus aureus, Bacillus subtilis, Escherichia coli and Pseudomonas aeruginosa and antifungal activity against Candida albicans, Candida-6, Candida-51, Aspergillus niger and Aspergillus flavus. Compounds 30-32 exhibited potent in vitro antibacterial activity against E. coli and P. aeruginosa whereas the same set of compounds exerted potent in vitro antifungal activity against Candida-6, A. niger and A. flavus.