A series of amides of caffeic acid has been synthesised and their antioxidant properties evaluated as lipid peroxidation inhibitors. Anilides of caffeic acid were found to be very efficient antioxidants with IC50's of 0.3 microM.
Evaluation of caffeic acid amide analogues as anti-platelet aggregation and anti-oxidative agents
作者:Chia-Cheng Hung、Wei-Jen Tsai、Li-Ming Yang Kuo、Yao-Haur Kuo
DOI:10.1016/j.bmc.2004.11.055
日期:2005.3.1
A series of amides of caffeic acid were synthesized and evaluated for their anti-platelet and anti-oxidative activities. N-(2-Bromo-phenyl)-3-(3,4-dihydroxy-phenyl)-acrylamide (12) and N-(3-Bromo-phenyl)-3-(3,4-dihydroxy-phenyl)-acrylamide (13) exhibited potent inhibitory activity (IC50 = 5.8 and 6.7 muM, respectively) against arachidonic acid-induced (AA) platelet aggregation, comparable with invalid caffeic acid. Most of the synthesized caffeic acid anifides exhibited the promising anti-platelet aggregation in AA-induced assay and anti-oxidative activities. This study also exhibited that caffeic anilides displayed more potent anti-oxidative activity in the radical scavenging activity assay than trolox and vitamin E. (C) 2004 Elsevier Ltd. All rights reserved.
Design, Synthesis and Biological Evaluation of Caffeic Acid Amides as Selective MMP-2 and MMP-9 Inhibitors