Oligonucleotide Analogues with a Nucleobase-Including Backbone, Part 5, 2′-Deoxy-8-(hydroxymethyl)adenosine- and 2′-Deoxy-6-(hydroxymethyl)uridine-Derived Phosphoramidites: Synthesis and Incorporation into 14-Mer DNA Strands
作者:Werngard Czechtizky、Andrea Vasella
DOI:10.1002/1522-2675(20010321)84:3<594::aid-hlca594>3.0.co;2-9
日期:2001.3.21
The pairing propensity of new DNA analogues with a phosphinato group between O−C(3′) and a newly introduced OCH2 group at C(8) and C(6) of 2′-deoxyadenosine and 2′-deoxyuridine, respectively, was evaluated by force-field calculations and Maruzen model studies. These studies suggest that these analogues may form autonomous pairing systems, and that the incorporation of single modified units into DNA
评估了新 DNA 类似物与 O-C(3') 和新引入的 OCH2 基团之间的配对倾向,分别位于 2'-脱氧腺苷和 2'-脱氧尿苷的 C(8) 和 C(6) 处通过力场计算和丸善模型研究。这些研究表明,这些类似物可能形成自主配对系统,并且将单个修饰单元掺入 DNA 14mers 与双链体形成相容。为了评估掺入,我们分别从 2'-脱氧腺苷和 2'-脱氧尿苷制备了所需的亚磷酰胺 3 和 4。同样准备亚磷酰胺 5 以估计 C(8) 处的 CH2OH 基团对双链稳定性的影响。改性的 14-mer 6-9 是通过固相合成制备的。配对研究表明双链 13⋅9 的熔化温度降低了 2.5°,