Abstract
Quantum-chemical calculations using DFT, have been performed to explain the molecular structure antioxidant activity relationship of resveratrol (RSV) (1) analogues: 3,4-dihydroxy-trans-stilbene (3,4-DHS) (2); 4,4′-dihydroxy- trans-stilbene (4,4′-DHS) (3); 4-hydroxy-trans-stilbene (4-HS) (4); 3,5-dihydroxy-trans-stilbene (3,5-DHS) (5); 3,3′-dimethoxy-4,4′- dihydroxy-trans-stilbene (3,3′-DM-4,4′-DHS) (6); 2,4-dihydroxy-trans-stilbene (2,4-DHS) (7) and 2,4,4′-trihydroxy-trans- stilbene (2,4,4′-THS) (8). It was found that all compounds studied were effective antioxidants with the exception of 3, 5-DHS. The high antioxidant activity of both 3, 3′-DM-4, 4′-DHS and 3, 4-DHS may be due to the abstraction of the two hydrogen atoms of the para and ortho-position hydroxyls respectively, to form a quinone structure. Our results revealed that the antioxidant pharmacophore of 2,4-DHS and 2,4,4′-THS, exhibiting higher antioxidant activity than resveratrol, is the 2-hydroxystilbene, rather than 4-hydroxystilbene. Experimental observations were satisfactorily explained and commented.
Original language | English |
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Pages (from-to) | 2285-2298 |
Number of pages | 14 |
Journal | Journal of Molecular Modeling |
Volume | 19 |
Issue number | 6 |
DOIs | |
Publication status | Published - Jun 2013 |
Keywords
- AIP
- Antioxidant activity
- DFT method
- HOMO and LUMO
- Spin density
- Trans-resveratrol
ASJC Scopus subject areas
- Catalysis
- Computer Science Applications
- Physical and Theoretical Chemistry
- Organic Chemistry
- Computational Theory and Mathematics
- Inorganic Chemistry