Dichloro-4-quinolinol-3-carboxylic acid: Synthesis and antioxidant abilities to scavenge radicals and to protect methyl linoleate and DNA
作者:Guo-Xiang Li、Zai-Qun Liu、Xu-Yang Luo
DOI:10.1016/j.ejmech.2010.01.018
日期:2010.5
5,7-, 5,8-, 6,8-, 7,8-Dichloro-4-quinolinol-3-carboxylic acid (5,7-, 5,8-, 6,8-, 7,8-DCQA) together with 7-chloro-4-quinolinol-3-carboxylic acid (7-CQA) and 4-quinolinol-3-carboxylic acid (QA) were synthesized to investigate the antioxidant properties. 5,7-DCQA exhibited the highest ability to scavenge 2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonate) cationic radical (ABTS+.), 2,2′-diphenyl-1-picrylhydrazyl
5,7-,5,8-,6,8-,7,8-二氯-4-喹啉醇-3-羧酸(5,7-,5,8-,6,8-,7,8-DCQA )与7-氯-4-喹啉-3-羧酸(7-CQA)和4-喹啉-3-羧酸(QA)一起合成以研究其抗氧化性能。5,7-DCQA表现出最高的清除2,2'-叠氮基双(3-乙基苯并噻唑啉-6-磺酸盐)阳离子自由基(ABTS +。),2,2'-二苯基-1-吡啶并肼基(DPPH)和加尔维氧基自由基的能力。6,8-DCQA具有最高的保护亚油酸甲酯抵抗2,2'-偶氮双(2-ami基丙烷)二盐酸盐(AAPH)诱导的氧化的功效。5,7-,5,8- DCQA和QA能够延缓β胡萝卜素漂在β-胡萝卜素-亚油酸乳液。此外,5,8-和6,8-DCQA有效保护DNA免受羟基自由基(.OH)介导的氧化作用,而5,8-DCQA和7-CQA具有保护DNA免受AAPH诱导的氧化作用的活性。此外,只有7-CQA可以保护DNA免受Cu