Quinone methide chemistry of prekinamycins: 13C- labeling, spectral global fitting and in vitro studies
作者:Omar Khdour、Edward B. Skibo
DOI:10.1039/b903844b
日期:——
In this article, we address the presence of the prekinamycin quinone methide using the techniques of spectral global fitting and the13C-labeling of the reactive centre. Two-electron reduction of a prekinamycin affords a long-lived quinone methide species that was characterised spectrally. A correlation was made between the calculated ΔE (kcal/mol) values for quinone methide tautomerisation and cytostatic activity to support the postulate that the quinone methide plays a role in prekinamycin biological activity. We also prepared a stable quinone methide of prekinamycin and studied its solution chemistry directly.
在这篇文章中,我们利用光谱全局拟合技术和反应中心的 13C 标记技术研究了前激酶醌甲醚的存在。前激纳霉素的双电子还原产生了一种长寿命的醌甲甙物种,并对其进行了光谱表征。计算得出的醌甲醚同分异构化 ΔE(kcal/mol)值与细胞抑制活性之间存在相关性,从而支持了醌甲醚在前激纳霉素生物活性中发挥作用的推测。我们还制备了一种稳定的前激纳霉素醌甲醚,并直接研究了其溶液化学性质。