期刊
MOLECULES
卷 23, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/molecules23040710
关键词
antioxidant activity; cyclic voltammetry; DPPH; domino reaction; benzofuran-2-ones
资金
- Dipartimento di Scienze and Sezione di Nanoscienze e Nanotecnologie (Universita di Roma Tre, Roma, Italy)
The present work aimed to synthesise promising antioxidant compounds as a valuable alternative to the currently expensive and easily degradable molecules that are employed as stabilizers in industrial preparation. Taking into account our experience concerning domino Friedel-Crafts/lactonization reactions, we successfully improved and extended the previously reported methodology toward the synthesis of 3,3-disubstituted-3H-benzofuran-2-one derivatives 9-20 starting from polyphenols 1-6 as substrates and either diethylketomalonate (7) or 3,3,3-trifluoromethyl pyruvate (8) as electrophilic counterpart. The antioxidant capacity of the most stable compounds (9-11 and 15-20) was evaluated by both DPPH assay and Cyclic Voltammetry analyses performed in alcoholic media (methanol) as well as in aprotic solvent (acetonitrile). By comparing the recorded experimental data, a remarkable activity can be attributed to few of the tested lactones.
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