Furan decorated nucleoside analogues as fluorescent probes: synthesis, photophysical evaluation, and site-specific incorporation
作者:Nicholas J. Greco、Yitzhak Tor
DOI:10.1016/j.tet.2007.01.073
日期:2007.4
properties of all furan containing nucleosides, identifies the furan thymidine analogue, 5-(fur-2-yl)-2'-deoxyuridine, as the best candidate for use as a responsive fluorescent probe in nucleic acids. 5-(fur-2-yl)-2'-deoxyuridine was then converted to the corresponding phosphoramidite and site specifically incorporated into DNA oligonucleotides with greater than 88% coupling efficiency. Such furan-modified
报道了修饰的核苷类似物的合成和光物理评价,其中五元杂环(呋喃、噻吩、恶唑和噻唑)连接到 2'-脱氧尿苷的 5 位。由于其发射量子效率和对其微环境的敏感性程度,含呋喃衍生物被确定为该家族中最有希望的响应核苷。然后将呋喃部分连接到 2'-脱氧胞苷的 5 位以及腺苷和鸟苷的 8 位。对这四种含呋喃核苷类似物的光物理评估揭示了吸收、发射和量子效率的明显差异,具体取决于核苷(嘧啶或嘌呤)的类别。比较所有含呋喃核苷的光物理性质,确定呋喃胸苷类似物 5-(fur-2-yl)-2'-deoxyuridine 作为核酸中响应荧光探针的最佳候选者。然后将 5-(fur-2-yl)-2'-deoxyuridine 转化为相应的亚磷酰胺,并以大于 88% 的偶联效率将位点特异性地掺入 DNA 寡核苷酸中。这种呋喃修饰的寡核苷酸在与其互补的 DNA 链杂交后形成稳定的双链体,并显示出有利的荧光特征。