New Isoflavones with Antioxidant Activity Isolated from Cornulaca monacantha

In the course of phytochemical and chemotaxonomical investigations of Cornulaca monacantha (Amaranthaceae), two new isoflavones, 3‐(2‐hydroxyphenyl)‐5,7‐dimethoxy‐6‐(methoxymethyl)‐4H‐1‐benzopyran‐4‐one (1) and 7‐hydroxy‐3‐(4‐hydroxyphenyl)‐5‐methoxy‐6‐(methoxymethyl)‐4H‐1‐benzopyran‐4‐one (2) were...

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Bibliographic Details
Published in:Chemistry & biodiversity 2020-12, Vol.17 (12), p.e2000758-n/a
Main Authors: Mhiri, Rania, Koubaa, Imed, Chawech, Rachid, Auberon, Florence, Allouche, Noureddine, Michel, Thomas
Format: Article
Language:English
Subjects:
antioxidant activity
Antioxidants
Chemical Sciences
chromatography
Cornulaca monacantha
isoflavone
Isoflavones
NMR
Nuclear magnetic resonance
Vanillic acid
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Summary:In the course of phytochemical and chemotaxonomical investigations of Cornulaca monacantha (Amaranthaceae), two new isoflavones, 3‐(2‐hydroxyphenyl)‐5,7‐dimethoxy‐6‐(methoxymethyl)‐4H‐1‐benzopyran‐4‐one (1) and 7‐hydroxy‐3‐(4‐hydroxyphenyl)‐5‐methoxy‐6‐(methoxymethyl)‐4H‐1‐benzopyran‐4‐one (2) were isolated from the fresh aerial parts of C. monacantha among with three known compounds named vanillic acid (3), N‐cis‐feruloyltyramine (4) and N‐trans‐feruloyltyramine (5). Their structures were elucidated by means of spectroscopic methods including one‐ and two‐dimensional NMR and HR‐ESI‐MS techniques. The isolated compounds exhibited interesting antioxidant activity determined by DPPH, ABTS and TAC tests.
ISSN:1612-1872
1612-1880
DOI:10.1002/cbdv.202000758