This invention is related to nucleic acid chemistry and describes novel 1,2- dithiolane functionalized nucleoside phosphoramidites (1, Chart 1) and corresponding solid supports (2, Chart 1). In addition to these derivatives, 1,2- dithiolane moiety can also be functionalized to at the various positions of the nucleobase and sugar part as shown in Schemes 1 to 8. The nucleosides of our invention carry a primary hydroxyl for DMTr (4,4'-dimethoxytrityl) function for chain elongation. Furthermore, the phosphoramidite function is attached at the 3'- hydroxyl of the nucleoside. This allows oligonucleotide chain extension under standard DNA and RNA synthesis chemistry conditions and techniques, thus leading to high quality oligonucleotides. These derivatives are useful for introduction of reactive thiol groups either at 3'- or 5 '-end of the oligonucleotides on the solid supports such as gold, silver and quantum dots.
这项发明涉及核酸
化学,并描述了新颖的1,2-二
硫杂
环己烷功能化的核苷酸
磷酸酯(1,图1)及相应的固相支持体(2,图1)。除了这些衍
生物外,1,2-二
硫杂
环己烷基团还可以在核碱基和糖部分的不同位置进行功能化,如方案1至8所示。我们发明的核苷酸携带一个主要的羟基用于
DMTr(4,4'-二甲氧基三苯基)功能以进行链延伸。此外,
磷酸酯功能连接在核苷酸的3'-羟基上。这使得在标准的DNA和RNA合成
化学条件和技术下进行寡核苷酸链的延伸,从而产生高质量的寡核苷酸。这些衍
生物可用于在
金、
银和量子点等固相支持体上引入反应性
硫醇基团,无论是在寡核苷酸的3'-端还是5'-端。