Abstract
With the emergence of multidrug-resistant strains of Mycobacterium tuberculosis (MDR-TB) and extensive drug-resistant strains (XDR-TB), there is an urgent need to develop novel drugs for the treatment of tuberculosis. Here, we designed and synthesized a series of 5-methylpyrimidopyridone analogues as potential antitubercular agents. The most potent compound 6q exhibited a MIC value of 4 μM in vitro against Mycobacterium tuberculosis. The antitubercular activities of the synthesized compounds were impacted by the amantadine and 2-chlorophenyl groups, and were enhanced by the presence of 3-methyl(4-dimethylamino)piperidinylphenyl. Molecular modeling and binding studies suggest that PknB is the potential molecular target of 5-methylpyrimidopyridone compounds. This study provides insights for the future development of new antimycobacterial agents with novel mechanisms of action.
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