Inhibiting effect of 6-methyluracil derivatives on the free -radical oxidation of 1,4-dioxane
作者:L. R. Yakupova、A. V. Ivanova、R. L. Safiullin、A. R. Gimadieva、Yu. N. Chernyshenko、A. G. Mustafin、I. B. Abdrakhmanov
DOI:10.1007/s11172-010-0138-8
日期:2010.3
radical-chain oxidation of 1,4-dioxane. The rate constants of the reactions of 1,4-dioxane peroxide radicals with 6-methyluracil (1), 6-methyl-5-piperidinouracil (2), 6-methyl-5-morpholinomethyluracil (3), 6-methyl-5-morpholinouracil (4), 6-methyl-5-methylaminouracil (5), 5-ethylamino-6-methyluracil (6), and 5-hydroxy-6-methyluracil (7) were measured. Among compounds 1–7, derivative 7 is most efficient
5-取代的 6-甲基尿嘧啶的抗氧化活性在 1,4-二恶烷引发的自由基链氧化模型系统中进行了定量估计。1,4-二恶烷过氧化物自由基与6-甲基尿嘧啶(1)、6-甲基-5-哌啶基尿嘧啶(2)、6-甲基-5-吗啉代甲基尿嘧啶(3)、6-甲基-5-的反应速率常数测定了吗啉尿嘧啶 (4)、6-甲基-5-甲基氨基尿嘧啶 (5)、5-乙基氨基-6-甲基尿嘧啶 (6) 和 5-羟基-6-甲基尿嘧啶 (7)。在化合物 1-7 中,衍生物 7 最有效,抑制率常数为 (5.2±0.1) · 104 L mol-1 s-1 (60 °C)。