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Synthesis, Biochemical Characterization, and Theoretical Studies of Novel β-Keto-enol Pyridine and Furan Derivatives as Potent Antifungal Agents
Author(s) -
Saïd Tighadouini,
Smaail Radi,
Redouane Benabbes,
Moulay Hfid Youssoufi,
Sergey Shityakov,
Mohamed El Massaoudi,
Yann Garcia
Publication year - 2020
Publication title -
acs omega
Language(s) - English
Resource type - Journals
ISSN - 2470-1343
DOI - 10.1021/acsomega.0c02365
Subject(s) - chemistry , electrospray ionization , pyridine , antibacterial activity , bacillus subtilis , stereochemistry , enol , carbon 13 nmr , combinatorial chemistry , mass spectrometry , organic chemistry , chromatography , bacteria , biology , genetics , catalysis
In the present study, we report the design and synthesis of new derivatives of the β-keto-enol grafted on pyridine and furan moieties ( L 1 - L 11 ). Structures of compounds were fully confirmed by Fourier transform infrared spectroscopy (FT-IR), 1 H NMR, 13 C NMR, electrospray ionization/liquid chromatography-mass spectrometry (ESI/LC-MS), and elemental analysis. The compounds were screened for antifungal and antibacterial activities ( Escherichia coli , Bacillus subtilis , and Micrococcus luteus ). In vitro evaluation showed significant fungicidal activity for L 1 , L 4 , and L 5 against fungal strains ( Fusarium oxysporum f.sp albedinis ) compared to the reference standard. Especially, the exceptional activity has been demonstrated for L 1 with IC 50 = 12.83 μg/mL. This compound and the reference benomyl molecule also showed a correlation between experimental antifungal activity and theoretical predictions by Petra/Osiris/Molinspiration (POM) calculations and molecular coupling against the Fgb1 protein. The highest inhibition of bacterial growth for L 1 is due to its strongest binding to the target protein. This report may stimulate the further synthesis of examples of this substance class for the development of new drugs.

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