Facile synthesis and antioxidant activity of lignin-related imidazo[1,2-a]pyridine derivatives
作者:Xiaohui Yang、Qianqian Shang、Caiying Bo、Lihong Hu、Yonghong Zhou
DOI:10.24820/ark.5550190.p010.526
日期:——
group in imidazo[1,2-a]pyridine could increase the radical scavenging activity; On the contrary, the presence of electron-withdrawing might decrease the radical scavenging activity. In addition, cyclopentyl and cyclohexyl groups almost had the same influence on the antioxidant activity. Furthermore, the methoxy moiety had a significant impact on antioxidant capability, and hence syringyl imidazo[1,2-a]pyridines
描述了一种方便的协议, 用于通过 2-氨基吡啶、异氰化物和从木质素获得的芳香醛之间的三组分反应制备木质素相关的咪唑并 [1,2-a] 吡啶衍生物, 收率极好。它们的体外抗氧化作用通过对 2,2-diphenyl-1-picrylhydrazyl (DPPH) 自由基的清除作用来评估。构效关系(SAR)研究表明,咪唑并[1,2-a]吡啶中引入给电子基团可提高自由基清除活性;相反,吸电子的存在可能会降低自由基清除活性。此外,环戊基和环己基对抗氧化活性的影响几乎相同。此外,甲氧基部分对抗氧化能力有显着影响,