Synthesis, structure, molecular docking, and structure-activity relationship analysis of enamines: 3-aryl-4-alkylaminofuran-2(5H)-ones as potential antibacterials |
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Authors: | Xiao Zhu-Ping He Xing-Bing Peng Zhi-Yun Xiong Tao-Ju Peng Juan Chen Li-Hua Zhu Hai-Liang |
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Affiliation: | College of Chemistry and Chemical Engineering, Key Laboratory of Hunan Forest Products and Chemical Industry Engineering, Jishou University, Jishou, PR China. xiaozhuping2005@163.com |
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Abstract: | Thirty-one 3-aryl-4-alkylaminofuran-2(5H)-ones were designed, prepared and tested for their antibacterial activity. Some of them showed significant antibacterial activity against Gram-positive organisms, especially against Staphylococcus aureus ATCC 25923, but all were inactive against Gram-negative organisms. Out of these compounds, 3-(4-bromophenyl)-4-(2-(4-nitrophenyl)hydrazinyl)furan-2(5H)-one (4a11) showed the most potent antibacterial activity against S. aureus ATCC 25923 with MIC(50) of 0.42 μg/mL. The enzyme assay revealed that the possible antibacterial mechanism of the synthetic compounds might be due to their inhibitory activity against tyrosyl-tRNA synthetase. Molecular dockings of 4a11 into S. aureus tyrosyl-tRNA synthetase active site were also performed. This inhibitor snugly fitting the active site might well explain its excellent inhibitory activity. Meanwhile, this modeling disclosed that a more suitable optimization strategy might be to modify the benzene ring at 3-position of furanone with hydrophilic groups. |
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