Related Experiment Videos
Synthesis of nucleic acid methylphosphonothioates
H C Roelen1, E de Vroom, G A van der Marel
1Gorlaeus Laboratory, Leiden, The Netherlands.
Nucleic Acids Research
|August 11, 1988
Summary
A novel reagent enables the synthesis of methylphosphonothioate linkages in DNA and RNA. This method allows for the creation of chiral pure hexamers and cyclic uridine derivatives, advancing oligonucleotide chemistry.
Area of Science:
- Oligonucleotide Chemistry
- Organic Synthesis
- Medicinal Chemistry
Background:
- Methylphosphonothioate linkages are important modifications in nucleic acid chemistry.
- Efficient methods for introducing these linkages and creating specific stereoisomers are needed.
Purpose of the Study:
- To develop a novel reagent for the in situ preparation of methylphosphonothioate linkages.
- To demonstrate the utility of this reagent in synthesizing chiral pure oligonucleotides and cyclic derivatives.
Main Methods:
- In situ generation of a reagent from methylphosphonothioic dichloride and 1-hydroxy-6-trifluoromethylbenzotriazole.
- Application of the reagent in the synthesis of protected dimer d-Tp(S,Me)A.
- Stereoselective synthesis of chiral pure hexamers (e.g., d-[CpCpTp(S,Me)ApGpG]).
- Preparation of the 3',5'-cyclic methylphosphonothioate of uridine.
Main Results:
- The developed reagent effectively introduces methylphosphonothioate linkages.
- Successful synthesis of individual diastereomers of the protected dimer d-Tp(S,Me)A.
- Chiral pure hexamers with defined stereochemistry were synthesized.
- The reagent proved effective for preparing the cyclic methylphosphonothioate of uridine.
Conclusions:
- A new, effective reagent for methylphosphonothioate linkage formation has been established.
- This method facilitates the synthesis of stereochemically defined oligonucleotides and cyclic nucleotide analogs.
- The findings contribute to advancements in nucleic acid-based therapeutics and chemical biology tools.