Stereochemistry of Internucleotide Bond Formation by the H-Phosphonate Method. 1. Synthesis and <sup>31</sup>P Nmr Analysis of 16 Diribonulceoside (3′-5′)-H-Phosphonates and the Corresponding Phosphorothioates
作者:Michal Sobkowski、Jadwiga Jankowska、Adam Kraszewski、Jacek Stawinski
DOI:10.1080/15257770500265729
日期:2005.9.1
Sixteen diribonucleoside (3′-5′)-H-phosphonates were synthesized via condensation of the protected ribonucleoside 3′-H-phosphonates with nucleosides, and the influence of a nucleoside sequence on the observed stereoselectivity was analyzed. 31P NMR spectroscopy was used to evaluate a relationship between chemical shift and absolute configuration at the phosphorous center of the H-phosphonate diesters
通过受保护的核糖核苷 3'-H-膦酸酯与核苷的缩合合成了 16 种二核糖核苷 (3'-5')-H-膦酸酯,并分析了核苷序列对观察到的立体选择性的影响。31P NMR光谱用于评估H-膦酸二酯以及相应硫代磷酸二酯的磷中心的化学位移和绝对构型之间的关系。尽管在大多数情况下发现了这种相关性,但也有一些例外,即由 RP 和 SP 非对映异构体产生的共振的相对位置颠倒的规则。