Abstract
Various approaches to the synthesis of 3-halopyrazolo[1,5-a]pyrimidines were studied. It is shown that the most effective strategy consists in the construction of the azoloazine core followed by halogenation with N-iodo- or N-bromosuccinimide. A series of 3-halopyrazolo[1,5-a]pyrimidines, which are bioisosteric analogs of natural purine nucleic bases and the drug Triazavirin®, were synthesized using this strategy. The obtained compounds are interesting as precursors of novel C-nucleosides, which can be synthesized by C-C-coupling with (pseudo)ribosides containing a keto group.
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This work was performed under financial support of the Russian Science Foundation (Project No. 22-23-00282).
No human or animal subjects were used in this research.
Based on the materials of the VI International Scientific and Practical Conference “Modern Synthetic Methodologies for Creating Drugs and Functional Materials” (MOSM 2022) (November 7–11, 2022, Ekaterinburg, Russia).
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, Vol. 72, No. 8, pp. 1821–1836, August, 2023.
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Mukhin, E.M., Savateev, K.V., Voinkov, E.K. et al. 3-Halopyrazolo[1,5-a]pyrimidines as promising precursors of novel C-nucleosides. Russ Chem Bull 72, 1821–1836 (2023). https://doi.org/10.1007/s11172-023-3965-0
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DOI: https://doi.org/10.1007/s11172-023-3965-0