The Crystal Structure of 3-Amino-1-(4-Chlorophenyl)-9-Methoxy-1H-Benzo[f]Chromene-2-Carbonitrile: Antimicrobial Activity and Docking Studies

Okasha, Rawda M.; Fouda, Ahmed M.; Bajaber, Majed A.; Ghabbour, Hazem A.; Amr, Abd El‐Galil E.; Naglah, Ahmed M.; Almehizia, Abdulrahman A.; Elhenawy, Ahmed A.; El‐Agrody, Ahmed M.

doi:10.3390/cryst12070982

Cited by 6 publications

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“…Based on all the previous information, and in the interests of synthesizing new antimicrobial agents, we chose, in this work, to synthesize new imidazo[4,5-b]pyridine derivatives ( 1 ) on which we have introduced modifications using the N-alkylation reaction, under conditions of phase transfer catalysis solid–liquid [ 16 ] with a series of halogenated compounds such as Benzyl and ethyl ethanoate, known for their biological activities [ 17 , 18 , 19 , 20 , 21 , 22 , 23 ]. Theoretical calculations were performed by the DFT [ 24 , 25 , 26 ] to explain reasons that manage the alkylation reactions of imidazopyridine ( 1 ), and then synthesized compounds were characterized by spectroscopic techniques such as 1 H NMR, 13 C NMR and X-Ray diffraction. In addition, some of those compounds were evaluated for their antibacterial activities in vitro against Escherichia coli and Bacillus cereus bacteria.…”

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confidence: 99%

Exploring Antimicrobial Features for New Imidazo[4,5-b]pyridine Derivatives Based on Experimental and Theoretical Study

et al. 2023

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5-bromopyridine-2,3-diamine reacted with benzaldehyde to afford the corresponding 6-Bromo-2-phenyl-3H-imidazo[4,5-b]pyridine (1). The reaction of the latter compound (1) with a series of halogenated derivatives under conditions of phase transfer catalysis solid–liquid (CTP) allows the isolation of the expected regioisomers compounds (2–8). The alkylation reaction of (1) gives, each time, two regioisomers, N3 and N4; in the case of ethyl bromoactate, the reaction gives, at the same time, the three N1, N3 and N4 regioisomers. The structures of synthesized compounds were elucidated on the basis of different spectral data (1H NMR, 13C NMR), X-Ray diffraction and theoretical study using the DFT method, and confirmed for each compound. Hirshfeld surface analysis was used to determine the intermolecular interactions responsible for the stabilization of the molecule. Density functional theory was used to optimize the compounds, and the HOMO-LUMO energy gap was calculated, which was used to examine the inter/intra molecular charge transfer. The molecular electrostatic potential map was calculated to investigate the reactive sites that were present in the molecule. In order to determine the potential mode of interactions with DHFR active sites, the three N1, N3 and N4 regioisomers were further subjected to molecular docking study. The results confirmed that these analogs adopted numerous important interactions, with the amino acid of the enzyme being targeted. Thus, the most docking efficient molecules, 2 and 4, were tested in vitro for their antibacterial activity against Gram-positive bacteria (Bacillus cereus) and Gram-negative bacteria (Escherichia coli). Gram-positive bacteria were more sensitive to the action of these compounds compared to the Gram-negative, which were much more resistant.

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