Synthesis and Biological Evaluation of Polyfluoroalkylated Antipyrines and their Isomeric O-Methylpyrazoles
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Synthesis and Evaluation of a Ruthenium-based Mitochondrial Calcium Uptake Inhibitor
Published on: October 26, 2017
Natalya Agafonova1, Evgeny Shchegolkov1, Yanina Burgart1
1Postovsky Institute of Organic Synthesis of the Ural Branch of the Russian Academy of Sciences, S. Kovalevskoy Str., 22, Ekaterinburg 620990, Russian Federation.
Background:
Formally belonging to the non-steroidal anti-inflammatory drug class pyrazolones have long been used in medical practices.
Objective:
Our goal is to synthesize N-methylated 1-aryl-3-polyfluoroalkylpyrazolones as fluorinated analogs of antipyrine, their isomeric O-methylated derivatives resembling celecoxib structure and evaluate biological activities of obtained compounds.
Methods:
In vitro (permeability) and in vivo (anti-inflammatory and analgesic activities, acute toxicity, hyperalgesia, antipyretic activity, "open field" test) experiments. To suggest the mechanism of biological activity, molecular docking of the synthesized compounds was carried out into the tyrosine site of COX-1/2.
Results:
We developed the convenient methods for regioselective methylation of 1-aryl-3- polyfluoroalkylpyrazol-5-ols leading to the synthesis N-methylpyrazolones and O-methylpyrazoles as antipyrine and celecoxib analogs respectively. For the first time, the biological properties of new derivatives were investigated in vitro and in vivo.
Conclusion:
The trifluoromethyl antipyrine represents a valuable starting point in design of the lead series for discovery new antipyretic analgesics with anti-inflammatory properties.
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