stereoselective synthesis of (5′S)-5′-C-(5-bromo-2-penten-1-yl)-2′-deoxyribofuranosyl thymine phosphoramidite is described; the absolute stereochemistry of the compound has been determined by X-ray diffraction analysis. This convertiblenucleoside has been incorporated into oligodeoxynucleotides (ODNs) and proved to be suitable for post-synthesis conjugation on solid support. When a diamine is tethered, there
描述了 (5'S)-5'-C-(5-bromo-2-penten-1-yl)-2'-脱氧呋喃核糖胸腺嘧啶亚磷酰胺的立体选择性合成;该化合物的绝对立体化学已通过 X 射线衍射分析确定。这种可转化的核苷已被整合到寡脱氧核苷酸 (ODN) 中,并被证明适用于固体支持物上的合成后缀合。当二胺被束缚时,ODN 的配对特性没有改变。分子模型表明取代基被插入到双链体的小沟中。