Chemical Synthesis of Cross-Link Lesions Found in Nitrous Acid Treated DNA: A General Method for the Preparation of N2-Substituted 2‘-Deoxyguanosines
作者:Eric A. Harwood、Paul B. Hopkins、Snorri Th. Sigurdsson
DOI:10.1021/jo991501+
日期:2000.5.1
nitrogen atom linking C2 of a dG nucleoside to C6 of deoxyadenosine (2). The chemical synthesis of 1 and 2, utilizing a palladium-catalyzed coupling, is described herein. It is demonstrated that the spectroscopic properties of synthetic 1 are identical to that of lesion 1 obtained from nitrous acid cross-linked DNA, thus providing a proof of its structure. Comparison of the limited spectroscopic data available
用亚硝酸处理DNA将导致DNA-DNA交联的形成。先前已分离出两个交联病变,并根据光谱数据指定了它们的结构。已提议主要病变由两个共享一个共同的N2原子的脱氧鸟苷(dG)核苷组成(1),而较小病变的结构则由一个将dG核苷的C2与C6的C6连接的公共氮原子组成。脱氧腺苷(2)。本文描述了利用钯催化的偶联的1和2的化学合成。证明了合成物1的光谱性质与从亚硝酸交联的DNA获得的病变1的光谱性质相同,从而提供了其结构的证明。从亚硝酸交联的DNA到合成2的病变2可获得的有限光谱数据的比较支持其结构分配。已显示用于合成1和2的合成方法是以高收率制备各种N2取代的dG核苷的一般方法。