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A novel protecting strategy for internucleosidic phosphate and phosphorothioate groups
1Department of Medicinal Chemistry, Isis Pharmaceuticals, 2292 Faraday Ave., Carlsbad, California 92008, USA.
Nucleosides, Nucleotides & Nucleic Acids
|September 21, 2001
Summary
A novel protecting group, 2-(N-isopropyl-N-anisoylamino)ethyl, enhances oligonucleotide synthesis. It offers high coupling efficiency and stability for phosphoramidite building blocks, simplifying DNA and RNA production.
Area of Science:
- Organic Chemistry
- Biochemistry
- Molecular Biology
Background:
- Oligonucleotide synthesis is crucial for molecular biology and therapeutics.
- Protecting groups are essential for managing reactive sites during synthesis.
- Existing protecting groups may have limitations in efficiency or stability.
Purpose of the Study:
- To evaluate the efficacy of the 2-(N-isopropyl-N-anisoylamino)ethyl group in oligonucleotide synthesis.
- To assess the performance of this group regarding coupling yields, deprotection kinetics, and hydrolytic stability.
- To elucidate the deprotection mechanism of this novel protecting group.
Main Methods:
- Utilized phosphoramidite chemistry for oligonucleotide synthesis.
- Employed a model phosphate triester to study the deprotection mechanism.
- Analyzed coupling yields and deprotection kinetics through standard chemical assays.
Main Results:
- The 2-(N-isopropyl-N-anisoylamino)ethyl group demonstrated high coupling yields.
- Favorable deprotection kinetics were observed for the protecting group.
- Phosphoramidite building blocks incorporating this group exhibited high hydrolytic stability.
Conclusions:
- The 2-(N-isopropyl-N-anisoylamino)ethyl group is a valuable tool for oligonucleotide synthesis.
- Its properties facilitate efficient and stable synthesis of DNA and RNA molecules.
- Understanding the deprotection mechanism aids in optimizing synthetic strategies.