Syntheses of Two 5-Hydroxymethyl-2′-deoxycytidine Phosphoramidites with TBDMS as the 5-Hydroxymethyl Protecting Group and Their Incorporation into DNA
作者:Qing Dai、Chun-Xiao Song、Tao Pan、Chuan He
DOI:10.1021/jo200566d
日期:2011.5.20
epigenetic mark. We report here the syntheses of two new versions of phosphoramidites III and IV from 5-iodo-2′-deoxyuridine in 18% and 32% overall yields, respectively, with TBDMS as the 5-hydroxyl protecting group. Phosphoramidites III and IV allow efficient incorporation of 5-hmC into DNA and a “one-step” deprotection procedure to cleanly remove all the protecting groups. A “two-step” deprotection strategy
5-羟甲基胞嘧啶 (5-hmC) 是哺乳动物基因组 DNA 中新发现的 DNA 碱基修饰,被认为是主要的表观遗传标记。我们在此报道了以 TBDMS 作为 5-羟基保护基团,从 5-碘-2'-脱氧尿苷合成两种新形式的亚磷酰胺III和IV ,总产率分别为 18% 和 32%。亚磷酰胺III和IV可将 5-hmC 有效掺入 DNA 中,并通过“一步”脱保护程序彻底去除所有保护基团。 “两步”去保护策略与超温和的 DNA 合成兼容,这使得能够合成含有额外修饰的 5hmC DNA。