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Updated: Jun 25, 2025

Chemical Triphosphorylation of Oligonucleotides
Published on: June 2, 2022
The synthesis of solid supports carrying base labile linkers to generate 3'-phosphate oligonucleotides
Kwazi Masuku1, Luis Miguel Menéndez-Méndez2, Sikabwe Noki1
1Peptide Science Laboratory, School of Chemistry and Physics, University of KwaZulu-Natal, Westville, Durban 4000, South Africa.
Abstract:
Oligonucleotides carrying 3'-terminal phosphates and conjugates are important tools in molecular biology and diagnostic purposes. We described the preparation of solid supports carrying the base labile linker 4-((2-hydroxyethyl)sulfonyl)benzamide for the solid-phase synthesis of 3'-phosphorylated oligonucleotides. These supports are fully compatible with the phosphoramidite chemistry yielding the desired 3'-phosphate oligonucleotides in excellent yields. The use of mild deprotection conditions allows the generation of partially protected DNA fragments.
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