An immobilized and reusable Cu(<scp>i</scp>) catalyst for metal ion-free conjugation of ligands to fully deprotected oligonucleotides through click reaction
作者:Laxman Eltepu、Muthusamy Jayaraman、Kallanthottathil G. Rajeev、Muthiah Manoharan
DOI:10.1039/c2cc36811k
日期:——
Chelation of Cu(I) ions to an immobilized hydrophilic tris(triazolylmethyl)amine chelator on a solid support allowed synthesis of RNA oligonucleotide conjugates from completely deprotected alkyne-oligonucleotides. No oligonucleotide strand degradation or metal ion contamination was observed. Furthermore, use of the immobilized copper(I) ion overcame regioselectivity issues associated with strain-promoted copper-free azide–alkyne cycloaddition.
将 Cu(I)离子与固定在固体载体上的亲水性三(三氮唑甲基)胺螯合剂螯合后,可利用完全脱保护的炔寡核苷酸合成 RNA 寡核苷酸共轭物。没有观察到寡核苷酸链降解或金属离子污染。此外,固定铜(I)离子的使用克服了与应变促进无铜叠氮-炔环加成相关的区域选择性问题。