Naphthalene, Phenanthrene, and Pyrene as DNA Base Analogues: Synthesis, Structure, and Fluorescence in DNA
作者:Rex X.-F. Ren、Narayan C. Chaudhuri、Pamela L. Paris、Rumney、Eric T. Kool
DOI:10.1021/ja9612763
日期:1996.1.1
efficient method has also been developed for epimerization of the α-anomers to β-anomers by acid-catalyzed equilibration; this isomerization is successfully carried out on the four polycyclic nucleosides as well as two substituted phenyl nucleosides. The geometry of the anomeric substitution is derived from (1)H NOE experiments and is also correlated with a single-crystal X-ray structure of one α-isomer
我们描述了携带多环芳烃的脱氧核糖核苷的合成、结构和 DNA 掺入作为 DNA“基础”类似物。新的多环化合物是 1-萘基、2-萘基、9-菲基和 1-芘基脱氧核苷。这些化合物是使用最近开发的 C-糖苷键形成方法合成的,该方法涉及芳香族化合物的有机镉衍生物与 1α-氯代脱氧核糖前体偶联。这种偶联的主要产物是脱氧核糖苷的 α-端基异构体。还开发了一种通过酸催化平衡将 α-端基异构体差向异构化为 β-端基异构体的有效方法;这种异构化成功地对四个多环核苷以及两个取代的苯基核苷进行。异头取代的几何形状源自 (1)H NOE 实验,并且还与一种 α-异构体的单晶 X 射线结构相关。三种多环 C-核苷衍生物通过其亚磷酰胺衍生物整合到 DNA 寡核苷酸中;芘基和菲基衍生物在 DNA 序列中显示出荧光。结果 (1) 拓宽了我们的 C-糖苷偶联反应的范围,(2) 证明(使用新的酸催化差向异构化)α-和 β-异头物
Hydrophobic, Non-Hydrogen-Bonding Bases and Base Pairs in DNA
作者:Barbara A. Schweitzer、Eric T. Kool
DOI:10.1021/ja00112a001
日期:1995.2
pyrimidines and purines in synthetic DNA duplexes. Phenyl nucleosides 1 and 2 are nonpolar isosteres of the natural thymidine nucleoside, and indole nucleoside 3 is an analog of the complementary purine 2-aminodeoxyadenosine. The nucleosides were incorporated into synthetic oligodeoxynucleotides and were paired against each other and against the natural bases. Thermal denaturation experiments were used