Add time:07/22/2019         Source:sciencedirect.com

A novel series of Schiff bases based on of 4-amino-5-(3,5-dimethoxy-phenyl)-4H-1,2,4-triazol-3-thiol scaffold was prepared by heating thiocarbohydrazide and 3,5,-dimethoxy benzoic acid at the temperature above its meting point, and subsequently, treating with substituted benzaldehydes. The chemical constituents in the synthesized compounds were confirmed by IR, Mass, 1H NMR spectroscopy and elemental analysis and the antifungal activity was evaluated against Candida albicans. The structure activity relationship analysis shows that the chloride substituted derivatives possess promising activity in micromolar concentration and also the hydroxy phenyl derivatives exhibited considerable activity at 128 μg/ml. But other compounds with amino, furan and methoxy substitutions did not show antifungal activity till the concentration of 512 μg/ml. In silico pharmacokinetic prediction shows that all the compounds obeyed Lipinski rule of 5 and are free of toxicity and metabolically stable. Pharmacophore analysis revealed that the aromatic/hydrophobic and aromatic/acceptor/donor features in the compounds are essential for the activity. The predicted cardiotoxicity (hERG) and lethal effect of the synthesized compounds will permit us to carry out further in vitro and in vivo toxicity studies.

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