Synthesis of 5-(2-Pyrenyl)-2′-deoxyuridine as a DNA Modification for Electron-Transfer Studies: The Critical Role of the Position of the Chromophore Attachment
作者:Claudia Wanninger-Weiß、Hans-Achim Wagenknecht
DOI:10.1002/ejoc.200700818
日期:2008.1
cross-coupling of 4 with 5-iodo-2′-deoxyuridine (5) was performed by using1,1′-bis[(diphenylphosphanyl)ferrocene]dichloropalladium(II) as the catalyst in a THF/MeOH/H2O mixture as the solvent. The modified nucleoside 2 was characterized by absorption and fluorescence spectroscopy. The results were compared with the strongly electronically coupled 5-(1-pyrenyl)-2′-deoxyuridine (1PydU, 1). Finally, the nucleoside
5-(2-芘基)-2'-脱氧尿苷 (2PydU, 2) 已被制备为一种新的胸苷类似物,其中芘发色团的 2-位通过单个 C-共价连接到尿苷的 5-位C 债券。2 的合成始于芘 (3) 转化为 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrene (4),使用 Ir 催化剂在 NaOMe 存在下,由 [IrCl(cod)]2 和 4,4'-二叔丁基-2,2'-联吡啶 (dtbpy) 原位制备。随后的 Suzuki-Miyaura 交叉偶联 4 与 5-碘-2'-脱氧尿苷 (5) 是通过使用 1,1'-双[(二苯基膦基)二茂铁]二氯钯 (II) 作为催化剂在 THF/MeOH/ H2O 混合物作为溶剂。修饰的核苷2通过吸收和荧光光谱表征。将结果与强电子耦合的 5-(1-芘基)-2'-脱氧尿苷 (1PydU, 1) 进行比较。最后,核苷 2 被转化为相应的亚磷酰胺