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Anti-Inflammatory & Anti-Allergy Agents in Medicinal Chemistry

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ISSN (Print): 1871-5230
ISSN (Online): 1875-614X

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Research Article

Substituted 3-R-2,8-Dioxo-7,8-dihydro-2H-pyrrolo[1,2-a][1,2,4] triazino [2,3-c]quinazoline-5a(6H)carboxylic Acids and their Salts – a Promising Class of Anti-inflammatory Agents

Author(s): Viktor Stavytskyi*, Oleksii Antypenko, Inna Nosulenko, Galyna Berest, Oleksii Voskoboinik and Sergiy Kovalenko

Volume 20, Issue 1, 2021

Published on: 05 May, 2020

Page: [75 - 88] Pages: 14

DOI: 10.2174/1871523019666200505073232

Price: $65

Abstract

Background: Computer-aided drug design is among the most effective methods of medicinal chemistry. The above mentioned approach is used for the purposeful search of antiinflammatory agents among quinazoline condensed derivatives.

Objective: The study aimed to conduct a purposeful synthesis of novel 3-R-2,8-dioxo-7,8-dihydro- 2H-pyrrolo[1,2-a][1,2,4]triazino[2,3-c]quinazoline-5a(6H)carboxylic acids and their salts as promising anti-inflammatory agents, evaluate their structure by physicochemical methods and establish their anti-inflammatory activity.

Methods: The structures of target compounds were proposed due to their structure similarity to existing drugs and experimental agents with anti-inflammatory activities. The features of the synthesized compounds structures were evaluated by IR-, NMR spectroscopy and chromatography-mass spectrometry and discussed in detail. Probable molecular mechanisms of activity were predicted by molecular docking. The anti-inflammatory activity was determined by their ability to reduce the formalin- and carrageenan-induced paw edema in rats.

Results: It was found that the condensation of 3-(2-aminophenyl)-6-R-1,2,4-triazin-5(2H)ones with 2-oxoglutaric acid yielded 3-R-2,8-dioxo-7,8-dihydro-2H-pyrrolo[1,2-a][1,2,4]triazino[2,3-c]quinazoline- 5a(6H)carboxylic acids which may be considered as a promising anti-inflammatory agent. An in silico study showed that the obtained compounds revealed affinity to the molecular targets and corresponded to the drug-like criteria. Additionally docking study allowed to estimate the nature of interactions between synthesized compounds and molecular targets. The in vivo experiments showed that the obtained compounds demonstrated significant anti-inflammatory activity comparable or higher than the activity of the reference drug Diclofenac.

Conclusion: The developed and implemented search strategy of the anti-inflammatory agents was justified. 3-R-2,8-dioxo-7,8-dihydro-2H-pyrrolo[1,2-a][1,2,4]triazino[2,3-c]quinazoline5a(6H)carboxylic acids possessed the anti-inflammatory activity and additional introduction of fluorine atoms in position 11 or 12 of the heterocyclic system led to amplification of this activity.

Keywords: Anti-inflammatory activity, drug design, 3-(2-aminophenyl)-6-R-1, 2, 4-triazin-5(2H)ones, pyrrolo[1, 2-a][1, 2, 4] triazino[2, 3-c]quinazolines, molecular docking, SAR.

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