Affiliation:
1. Faculty of Pharmacy, Shahidsadoughi University of Medical Sciences, Yazd, Iran
2. Research Center for Nursing and
Midwifery Care, Shahidsadoughi University of Medical Sciences, Yazd, Iran
3. Department of Medicinal Chemistry,
Faculty of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran
Abstract
Background:
Pyranopyrazoles have a variety of biological activities and can be obtained
by various starting materials and synthetic methods. Also, pyrazolopyrano[2,3-b]quinolins
that contain pyranopyrazole moiety have some biological activities such as anti-acetylcholinesterase
and anti-butyrylcholinesterase activity. In this research, our objective is to prepare
pyranopyrazole compounds and pyrazolopyrano[2,3-b]quinolins in a simple way and then evaluate
their antibacterial effect.
Methods:
In this study, pyrano[2,3-c]pyrazole derivatives have been synthesized by condensing
malononitrile, aromatic aldehydes, and 3-methyl-1-phenyl-2-pyrazolin-5-one in the presence of
magnesium perchlorate as a catalyst. Then we prepared pyrazolopyrano[2,3-b]quinolins via subsequent
Friedlander reaction between cyclohexanone and the obtained pyrano[2,3-c]pyrazoles. Also,
the antimicrobial activity of the synthesized pyrazolopyrano[2,3-b]quinolins against Staphylococcus
aureus, Methicillin-resistant Staphylococcus aureus, Pseudomonas aeruginosa, and
Escherichia coli was measured. Then we studied molecular docking of them to find the predicted
compounds' interactions and binding energy with DNA-gyrase with the AutoDock 4.2 software.
Results:
Pyrazolopyrano[2,3-b]quinolins were synthesized in the optimized conditions. Evaluation
of their antibacterial activities showed that these compounds have moderate to good antibacterial
activities against four bacteria species. Also molecular docking tests of docked compounds showed
a strong bonding interaction with DNA-Gyrase and had been docked into the intercalation place of
DNA of DNA-gyrase complex. The molecule bonded to the DNA stabilized by the H bonds, hydrophobic
interactions, and π-π interaction.
Conclusion:
We have developed an efficient and one-pot ecofriendly protocol for the synthesis of
some novel pyrano[2,3-c]pyrazol derivatives and pyrazolopyrano[2,3-b]quinolins under simple conditions
and then tested them for their antibacterial activities. Also, we studied molecular docking of
them. These compounds showed moderate to good inhibitory action.
Publisher
Bentham Science Publishers Ltd.
Subject
General Pharmacology, Toxicology and Pharmaceutics
Cited by
1 articles.
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