Synthesis of Oligoribonucleic Acid Conjugates Using a Cyclooctyne Phosphoramidite
摘要:
The conjugation of a ribonucleic acid 16-mer with the cationic amphiphilic peptide penetratin and an anionic hyaluronan tetrasaccharide by means of Cu-free "click" chemistry is reported. The alkyne-functionalized 16-mer was prepared by automated solid-phase synthesis, using a newly developed strained cyclooctyne phosphoramidite in the final coupling. Cycloaddition of the alkyne functionalized RNA to the azide containing biomolecules led to a clean conversion into the corresponding nucleic acid conjugates.
Oligonucleotide Conjugates by Means of Copper-Free Click Chemistry - Expanding the Repertoire of Strained Cyclooctyne Phosphoramidites
作者:Gijsbert van der Marel、Dmitri Filippov、Pieter van Delft、Evert van Schie、Nico Meeuwenoord、Herman Overkleeft
DOI:10.1055/s-0030-1260104
日期:2011.9
set of four phosphoramidite building blocks containing a strained dibenzocyclooctyne moiety is reported, including one example equipped with a cleavable disulfide linker. Application of these amidites in solid-phase oligonucleotide synthesis yields either 5′- or 3′-cyclooctyne-modified nucleic acids. The strained cyclooctyne-bearing oligonucleotides are used in rapid and clean conjugation reactions with