Add time:07/11/2019 Source:sciencedirect.com
The spread of infections caused by multidrug-resistant (MDR) pathogens, such as methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant S. aureus (VRSA), has created a need for new antibiotics with novel mechanisms of action. The bacterial division protein FtsZ has been identified as a novel drug target that can be exploited clinically. As part of an ongoing effort to develop FtsZ-targeting antibacterial agents, we describe herein the design, synthesis and bioactivity of six series of novel 1,3,4-oxadiazol-2-one-containing, 1,2,4-triazol-3-one-containing and pyrazolin-5-one-containing benzamide derivatives. Among them, compound A14 was found to be the most potent antibacterial agent, much better than clinical drugs such as ciprofloxacin, linezolid and erythromycin against all the tested gram-positive strains, particularly methicillin-resistant, penicillin-resistant and clinical isolated S. aureus. Subsequent studies on biological activities and docking analyses proved that A14 functioned as an effective compound targeting FtsZ. Preliminary SAR indicated a general direction for further optimization of these novel analogues. Taken together, this research provides a promising chemotype for developing newer FtsZ-targeting bactericidal agents.
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