The antioxidant effect of imine resveratrol analogues
作者:Jing Lu、Chang Li、Yun-Feng Chai、De-Yu Yang、Cui-Rong Sun
DOI:10.1016/j.bmcl.2012.06.026
日期:2012.9
Twenty five Imine resveratrol analogues (IRAs) were synthesized, replacing the C=C bond in resveratrol with C=N bond, as well as substitution modifications on aromatic rings. Radical scavenging activities against DPPH, along with singlet oxygen quenching capacities were evaluated, and further confirmed using density functional theory calculations (DFT). It was found that IRAs bearing ortho-OH on B ring have better radical scavenging activities against DPPH than resveratrol, these compounds were also found to be effective O-1(2) quenchers. Theoretical studies on the reaction mechanism of these compounds with O-1(2) suggest that the 1,3-addition to a double bond with a -OH group with the formation of allylic hydroperoxide is the most probable reaction route. (C) 2012 Elsevier Ltd. All rights reserved.