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Updated: Jul 13, 2026

A Generalized Method for Determining Free Soluble Phenolic Acid Composition and Antioxidant Capacity of Cereals and Legumes
Published on: June 10, 2022
Heteroaryl-substituted phenols as potential antioxidants
Serena Ferrini1, Stefania Fusi, Fabio Ponticelli
1Dipartimento di Chimica, Università di Siena, via A. Moro 2, Siena, I-53100 Italy.
New O-heteroaryl phenols were synthesized and tested for radical scavenging. Compound 3c demonstrated superior antioxidant activity compared to tert-butylhydroxy-anisole (BHA), inhibiting oxidation and methaemoglobin formation effectively.
Area of Science:
- Organic Chemistry
- Medicinal Chemistry
- Biochemistry
Background:
- Phenolic compounds are known for their antioxidant properties.
- Developing novel radical scavengers is crucial for combating oxidative stress.
- Photo-Fries rearrangement offers a synthetic route to functionalized phenols.
Purpose of the Study:
- To synthesize and characterize novel O-heteroaryl phenols.
- To evaluate the radical scavenging activity of these compounds.
- To compare their efficacy against a known antioxidant, tert-butylhydroxy-anisole (BHA).
Main Methods:
- Synthesis of O-heteroaryl phenols.
- Structural characterization using spectroscopic techniques.
- Evaluation of radical scavenging activity using ABTS assay.
- Assessment of inhibition of linoleic acid oxidation and methaemoglobin formation.
Main Results:
- Successful synthesis and characterization of O-heteroaryl phenols.
- Compound 3c exhibited the highest ABTS radical scavenging activity (IC50 = 3.17 x 10(-6) M), significantly outperforming BHA (IC50 = 1.04 x 10(-5) M).
- Compound 3c demonstrated potent, dose-dependent inhibition of AAPH-induced linoleic acid oxidation and methaemoglobin formation, surpassing BHA's efficacy.
Conclusions:
- Photo-Fries rearrangement is an effective method for synthesizing C-heteroaryl derivatives from O-heteroaryl phenols.
- Compound 3c is a potent antioxidant with significant radical scavenging and protective effects against oxidative damage.
- These findings highlight the therapeutic potential of novel O-heteroaryl phenols as antioxidants.
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