Synthesis and Structure of Dinucleotides with S-Type Sugar Puckering and Noncanonical ε and ζ Torsion Angle Combination (ν2,ε,ζ-D-CNA)
作者:Christelle Dupouy、Pierre Lavedan、Jean-Marc Escudier
DOI:10.1002/ejoc.200701022
日期:2008.3
dinucleotide building units of nucleic acids and their (2′,5′)-ν2,ϵ′,ζ′-D-CNA analogues, in which the ϵ and ζ torsional angles are stereocontrolled by a dioxaphosphorinane ring structure (D-CNA family) is described from a common 3-deoxy-3-(hydroxymethyl)-D-allofuranose intermediate. NMR spectroscopic and circular dichroism structure analysis of ν2,ϵ,ζ-D-CNA shows that the sugar puckering is fixed in the C-2′-endo
核酸的 ν2,ϵ,ζ-D-CNA 二核苷酸结构单元及其 (2',5')-ν2,ϵ',ζ'-D-CNA 类似物的非对映异构体的合成,其中 ϵ 和 ζ扭转角由二氧杂膦环结构(D-CNA 家族)立体控制,描述来自常见的 3-脱氧-3-(羟甲基)-D-异呋喃糖中间体。ν2,ϵ,ζ-D-CNA 的 NMR 光谱和圆二色性结构分析表明,糖褶皱固定在 C-2'-内构象中,并且这些 D-CNA 结构元素可以稳定 ϵ/ζ 扭转角组合,这与典型的 A 型或 B 型双链体中观察到的典型组合显着不同。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)