Synthesis and evaluation of α-ketotriazoles and α,β-diketotriazOles as inhibitors of Mycobacterium tuberculosis

Two series of alpha-ketotriazole and alpha,beta-diketotriazole derivatives were synthesized and evaluated for antitubercular and cytotoxic activities. Among them, two alpha,beta-diketotriazole compounds, 6b and 9b, exhibited good activities (minimum inhibitory concentration = 7.6 mu M and 6.9 mu M, respectively) on Mycobacterium tuberculosis and multi-drug resistant M. tuberculosis strains and presented no cytotoxicity (IC50 > 50 mu M) on colorectal cancer HCT116 and normal fibroblast GM637H cell lines. These two compounds represent promising leads for further optimization. (C) 2013 Elsevier Masson SAS. All rights reserved.