Spiroiminodihydantoin Is a Major Product in the Photooxidation of 2‘-Deoxyguanosine by the Triplet States and Oxyl Radicals Generated from Hydroxyacetophenone Photolysis and Dioxetane Thermolysis
作者:Waldemar Adam、Markus A. Arnold、Matthias Grüne、Werner M. Nau、Uwe Pischel、Chantu R. Saha-Möller
DOI:10.1021/ol017138m
日期:2002.2.1
[reaction: see text] Photolysis of hydroxyacetophenone and thermolysis of the corresponding dioxetane afford spiroiminodihydantoin rather than 4,8-dihydro-4-hydroxy-8-oxo-2'-deoxyguanosine (4-HO-8-oxodG) through the oxidation of 2'-deoxyguanosine (dG) by triplet-excited hydroxyacetophenone and the peroxyl radicals derived thereof by alpha cleavage and subsequent oxygen trapping. The structure of the
[反应:参见正文]通过苯乙酰胺的氧化,对羟基苯乙酮进行光解,然后对相应的二氧杂环丁烷进行热解,从而得到螺亚胺二乙内酰脲而不是4,8-二氢-4-羟基-8-氧代-2'-脱氧鸟苷(4-HO-8-oxodG)三重态激发的羟基乙酰苯酮的2'-脱氧鸟苷(dG)及其通过α裂解和随后的氧捕获而衍生的过氧自由基。螺旋藻二乙内酰脲的结构由SELINQUATE NMR技术确定,该技术明确地确定了螺环的连接性。