Synthesis and antimicrobial properties of 4-acylaminobenzenethiosulfoacid S-esters

A series of esters of 4-acetyl, 4-trifluoroacetyl- and 4-(3-chloropropionyl)aminobenzenethiosulfoacids (twenty-four compounds) were synthesized and characterized by elemental analysis, 1H NMR and IR spectroscopy. The antibacterial activity of the novel candidates has been screened using the agar diffusion or serial dilution methods against representative Gram-positive (Staphylococcus aureus, Bacillus subtilis, Bacillus mesentericus, Mycobacterium sp., Mycobacterium luteum), Gram-negative (Aeromonas sp., Burkholderia cepacia, Alcaligenes faecalis, Pseudomonas aeruginosa, Escherichia coli, Proteus vulgaris) bacteria and fungi (Candida albicans, Candida tenuis, Candida glabrata, Verticillium dahliae, Trichophyton gypseum, Aspergillus niger, Aspergillus fumigatus, Penicillium chrysogenum). Particular potency has been discovered against all tested pathogenic bacteria and fungi by compounds 1l and 3l at nanomolar concentrations. Some appropriate effect of thiosulfoesters structure upon their antimicrobial activity was determined.