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Updated: Sep 24, 2025

Chemical Triphosphorylation of Oligonucleotides
Published on: June 2, 2022
Phosphotungstic acid as a novel acidic catalyst for carbohydrate protection and glycosylation
Jyun-Siao Chen1, Arumugam Sankar1, Yi-Jyun Lin1
1Department of Chemistry, National Chung Hsing University Taichung 402 Taiwan syluo@dragon.nchu.edu.tw.
Abstract:
This work demonstrates the utilization of phosphotungstic acid (PTA) as a novel acidic catalyst for carbohydrate reactions, such as per-O-acetylation, regioselective O-4,6 benzylidene acetal formation, regioselective O-4 ring-opening, and glycosylation. These reactions are basic and salient during the synthesis of carbohydrate-based bioactive oligomers. Phosphotungstic acid's high acidity and eco-friendly character make it a tempting alternative to corrosive homogeneous acids. The various homogenous acid catalysts were replaced by the phosphotungstic acid solely for different carbohydrate reactions. It can be widely used as a catalyst for organic reactions as it is thermally stable and easy to handle. In our work, the reactions are operated smoothly under ambient conditions; the temperature varies from 0 °C to room temperature. Good to excellent yields were obtained in all four kinds of reactions.
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