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Small Library of Triazolyl Polyphenols Correlating Antioxidant Activity and Stability with Number and Position of Hydroxyl Groups

AuthorsBonache de Marcos, María Ángeles ; Moreno-Fernández, Silvia; Miguel, Marta ; Sabater-Muñoz, Beatriz; González-Muñiz, Rosario
KeywordsSaccharomyces cerevisiae
1,4-disubstituted 1,2,3-triazoles
ORAC assay
Aqueous stability
Antioxidant capacity
ABTS assay
Issue Date2018
PublisherAmerican Chemical Society
CitationACS Combinatorial Science 20: 694-699 (2018)
AbstractPolyphenolic compounds have attracted much interest because of their antioxidant properties and multiple applications, from food or cosmetic preservatives to free radical scavengers as therapeutic agents. Inspired by common OH substitutions in natural products, here we describe a small library of 1,2,3-triazoles disubstituted with polyphenol groups at 1,4-positions, in an attempt to correlate the number and position of hydroxyl groups in the aromatic rings with the antioxidant activity. Some compounds from this library exhibit strong radical scavenging activities in the oxygen radical absorbance capacity assay, similar to or even higher than resveratrol and other well-kwon flavonoids. The antioxidant activity for selected compounds was confirmed in vitro through the 2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonate) test and in vivo by a Saccharomyces cerevisiae model organism assay. The activity depends on the number and position of the hydroxyl groups, with compounds bearing a 2″5″-hydroxyl substituents on the phenyl ring at position 4 showing the best antioxidant values. The presence of two quinone-forming phenolic groups at the same molecule is behind the instability of some of these compounds in aqueous media.
Publisher version (URL)http://dx.doi.org/10.1021/acscombsci.8b00118
Identifiersdoi: 10.1021/acscombsci.8b00118
issn: 2156-8952
e-issn: 2156-8944
Appears in Collections:(IQM) Artículos
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