Synthesis and antioxidant activity of 1,3,4-oxadiazoles and their diacylhydrazine precursors derived from phenolic acids
作者:Nevena Mihailović、Violeta Marković、Ivana Z. Matić、Nemanja S. Stanisavljević、Živko S. Jovanović、Snežana Trifunović、Ljubinka Joksović
DOI:10.1039/c6ra28787e
日期:——
resonance stabilization of the formed phenoxyl radical. Four diacylhydrazines (6d, 6e, 6g, and 6h) and four 1,3,4-oxadiazoles (7d, 7e, 7g and 7h) with the best DPPH scavenging activity, were chosen for further evaluation of their antioxidant potential through various assays. The investigated compounds exerted pronounced ABTS radical scavenging capacity, moderate to good H2O2 scavenging properties and strong
合成了八种含酚酸部分的1,3,4-恶二唑衍生物(7a–h)和八种其二酰基肼前体(6a–h),使用分光光度法进行了表征,并通过清除稳定的DPPH(2,2-二苯基- 1-picllhydrazyl)自由基。与它们相应的二酰基肼前体相比,最有效的酚类1,3,4-恶二唑显示出更好的DPPH清除活性,这是由于芳环和1,3,4-恶二唑部分均参与了形成的苯氧基自由基的共振稳定化。四个二酰基肼(6d,6e,6g和6h)和四个1,3,4-恶二唑(7d,7e),7克和7H)具有最佳DPPH自由基清除活性,被选择用于通过各种测定它们的抗氧化潜力的进一步评估。所研究的化合物具有明显的ABTS自由基清除能力,中等至良好的H 2 O 2清除性能以及强的铁离子还原能力。对最具活性的化合物的抗氧化性能的进一步体外评估证明了它们在正常肺成纤维细胞MRC-5中对过氧化氢诱导的氧化应激的保护作用。二酰基肼6h 与对照样品相比,