3-(1,3,4-Thiadiazole-2-yl)quinoline derivatives: Synthesis, characterization and anti-microbial activity

A new series of thiadiazoles and intermediate thiosemicarbazones were synthesized from the chloroquinone molecule, with an aim to explore their effect on in vitro growth of microorganisms causing microbial infection. The chemical structures of the compound were elucidated by elemental analysis, FTIR, 1H and 13C NMR and ESI-MS spectral data. In vitro anti-microbial activity was performed against Staphylococcus aureus, Streptococcus pyogenes, Salmonella typhimurium, and Escherichia coli. The MIC was detected using the double dilution method. The results were compared by calculating percent inhibit area/mu g of the compounds and the standard amoxicillin. The selected compounds were tested for cytotoxic results using MIT assay H9c2 cardiac myoblasts cell line and the results showed that all the compounds offered remarkable >80% viability to a concentration of 200 mu g/mL. (C) 2011 Elsevier Masson SAS. All rights reserved.