Oxidation of Guanosine to the Imidazolone Derivative via Proton-coupled Electron Transfer to Hydroperoxy Radical Derived from Superoxide
作者:Hiroya Murakami、Yukihiro Esaka、Tatsushi Nakayama、Bunji Uno
DOI:10.1246/cl.2011.268
日期:2011.3.5
Oxidation of guanosine (G) with electrochemically generated superoxide (O2•−) leads to the imidazolone (Iz) derivative as a single-electron oxidation product of G. A crucial step in the mechanism of the oxidation is the proton-coupled electron transfer (PCET) from G to the hydroperoxy radical (HO2•) that is derived from O2•−.
鸟苷(G)与电化学产生的超氧化物(O2--)发生氧化反应,生成咪唑啉酮(Iz)衍生物,作为 G 的单电子氧化产物。氧化机理的关键步骤是质子耦合电子转移(PCET),从 G 转移到由 O2--产生的过氧化氢自由基(HO2-)。