5-Aryl-2-(3,5-dialkyl-4-hydroxyphenyl)-4,4-dimethyl-4H-imidazole 3-Oxides and Their Redox Species: How Antioxidant Activity of 1-Hydroxy-2,5-dihydro-1H-imidazoles Correlates with the Stability of Hybrid Phenoxyl–Nitroxides
作者:Svetlana A. Amitina、Elena V. Zaytseva、Natalya A. Dmitrieva、Alyona V. Lomanovich、Natalya V. Kandalintseva、Yury A. Ten、Ilya A. Artamonov、Alexander F. Markov、Dmitrii G. Mazhukin
DOI:10.3390/molecules25143118
日期:——
containing a sterically hindered phenol group, are promising objects for studying antioxidant activity; on the other hand, they can form persistent hybrid phenoxyl–nitroxyl radicals (HPNs) upon oxidation. Here, a series of 5-aryl-4,4-dimethyl-4H-imidazole 3-oxides was obtained by condensation of aromatic 2-hydroxylaminoketones with 4-formyl-2,6-dialkylphenols followed by oxidation of the initially formed
咪唑系列的环状硝酮含有空间位阻酚基,是研究抗氧化活性的有希望的对象;另一方面,它们在氧化时可以形成持久的杂化苯氧基-硝酰基自由基(HPNs)。在这里,一系列 5-芳基-4,4-二甲基-4H-咪唑 3-氧化物是通过芳族 2-羟基氨基酮与 4-甲酰基-2,6-二烷基苯酚缩合,然后氧化最初形成的 N-羟基而获得的。衍生品。结果表明,1-羟基-2,5-二氢咪唑和4H-咪唑3-氧化物的抗氧化活性随着酚基中烷基取代基空间体积的减小而增加,而相应的HPNs的稳定性则由4H-咪唑3-氧化物显示出相反的趋势。