Solid-Phase Synthesis of Dipeptide-Conjugated Nucleosides and Their Interaction with RNA
作者:Guimin Dong、Liangren Zhang、Lihe Zhang
DOI:10.1002/hlca.200390295
日期:2003.10
Dipeptide-conjugated nucleosides were efficiently synthesized from the intermediates of 3′-amino-3′-deoxy-nucleosides by using the solid-phase synthetic strategy with HOBt/HBTU (1-hydroxy-1H-benzotriazole/2-(1H-benzotriazol-1-yl)-1,1,3,3-tetramethyluronium hexafluoroborate) as the coupling reagents (Schemes 1–3). CD Spectra and thermal melting studies showed that the synthesized hydrophobic dipeptidethymidine
二肽缀合的核苷有效地从的中间体合成3'-氨基-3'-脱氧核苷通过使用固相合成策略用HOBt / HBTU(1-羟基-1- ħ苯并三唑/ 2-(1 ħ -苯并三唑-1-基)-1,1,3,3-四甲基尿鎓六氟硼酸酯)作为偶联剂(方案1-3)。CD光谱和热熔研究表明,合成的疏水性二肽胸苷和尿苷衍生物8a - 8d,13a - d和18与polyA·polyU双链体具有适度的亲和力,并且可以诱导RNA构象的改变。该结果还暗示缀合物与RNA的相互作用可能与核苷的糖折叠构象有关。