作者:Ling-Yih Hsu、Chi-Fu Lin、Wen-Chuan Hsu、Wen-Lin Hsu、Tsu-Chung Chang
DOI:10.1248/bpb.28.1211
日期:——
Six polyphenolic acid esters were synthesized and their antioxidative properties were evaluated in three model systems [2,2′-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assay, 2,2′-azobis(2-amidinopropane)dihydrochloride (AAPH)-induced lipid peroxidation system, and the dye-bleaching assay of peroxynitrite radical]. Among these compounds, we found that compounds 4 [3,4-dihydroxy-benzoic acid-(2-phenoxyethyl ester)], and 5 [3,4-dihydroxy-cinnamic acid-(2-phenoxyethyl ester)] provided comparable activity to caffeic acid phenethyl ester (CAPE) in the DPPH model. Compound 3 [2,5-dihydroxy-benzoic acid-(2-phenoxyethyl ester)], was found to be more active than CAPE in the AAPH system, it also displayed about 2-fold greater activity than CAPE in the peroxynitrite radical model. These results suggest that these phenolic acid ester derivatives, with their potent anti-oxidant activities, may have useful applications as antioxidants.
合成了六种多酚酸酯,并在三种模型体系[2,2′-二苯基-1-苦基肼(DPPH)自由基清除试验、2,2′-偶氮双(2-脒基丙烷)二盐酸盐(AAPH)诱导的脂质过氧化体系和过氧化亚硝酸自由基的染料漂白试验]中评估了它们的抗氧化性。在这些化合物中,我们发现化合物 4 [3,4-二羟基苯甲酸-(2-苯氧基乙基)酯]和化合物 5 [3,4-二羟基肉桂酸-(2-苯氧基乙基)酯]在 DPPH 模型中的活性与咖啡酸苯乙酯(CAPE)相当。化合物 3[2,5-二羟基苯甲酸-(2-苯氧基乙基)酯]在 AAPH 系统中的活性高于 CAPE,在过氧化亚硝酸自由基模型中的活性也比 CAPE 高出约 2 倍。这些结果表明,这些酚酸酯衍生物具有强大的抗氧化活性,可作为抗氧化剂加以应用。