Synthesis and in vitro biological evaluation of 2-(phenylcarbamoyl)phenyl 4-substituted benzoates
Language English Country England, Great Britain Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
25593095
DOI
10.1016/j.bmc.2014.12.019
PII: S0968-0896(14)00867-0
Knihovny.cz E-resources
- Keywords
- Antimicrobial activity, Benzoate, Cytostasis, Cytotoxicity, Ester, In vitro activity, Multidrug-resistant tuberculosis, Mycobacterium tuberculosis, Nontuberculous mycobacteria, Salicylanilide,
- MeSH
- Anti-Bacterial Agents chemical synthesis chemistry pharmacology MeSH
- Antifungal Agents chemical synthesis chemistry pharmacology MeSH
- Bacteria drug effects MeSH
- Bacterial Infections drug therapy MeSH
- Benzoates chemical synthesis chemistry pharmacology MeSH
- Fungi drug effects MeSH
- Humans MeSH
- Tuberculosis, Multidrug-Resistant drug therapy MeSH
- Mycobacterium tuberculosis drug effects MeSH
- Mycobacterium drug effects MeSH
- Mycobacterium Infections drug therapy MeSH
- Mycoses drug therapy MeSH
- Tuberculosis drug therapy MeSH
- Check Tag
- Humans MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Anti-Bacterial Agents MeSH
- Antifungal Agents MeSH
- Benzoates MeSH
Based on the previously described antimicrobial activity of salicylanilide derivatives, we designed and synthesized novel 2-(phenylcarbamoyl)phenyl 4-substituted benzoates. The most active salicylanilides were selected for esterification by various 4-substituted benzoic acids. These compounds were evaluated in vitro against Mycobacterium tuberculosis, including multidrug-resistant strains, nontuberculous mycobacteria (Mycobacterium avium and Mycobacterium kansasii), and eight bacterial and fungal strains. We also investigated the cytostatic and cytotoxic actions of the esters. The minimum inhibitory concentrations (MICs) against mycobacteria ranged from 0.125 to 8μM. Interestingly, the drug-resistant strains exhibited the highest susceptibility without any cross-resistance with established drugs. 4-Bromo-2-[4-(trifluoromethyl)phenylcarbamoyl]phenyl 4-nitrobenzoate showed the most potent inhibition with MIC values ranging from 0.25 to 2μM. Gram-positive bacteria, including methicillin-resistant Staphylococcus aureus, were inhibited by two derivatives with MIC values of at least 0.49μM, whereas Gram-negative bacteria and most of the tested fungi did not display any marked susceptibility. Benzoates exhibited no cytotoxicity at concentrations up to 50μM but most caused significant cytostasis with IC50 values lower than 10μM. Some cytotoxicity-based selectivity indexes for drug-susceptible and drug-resistant M. tuberculosis as well as Staphylococci were higher than 100. These values indicate that some of these derivatives are promising candidates for future research.
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