ArticleChemistryOpen2025
Unexpected Tellurohalogenation of Terminal N-Alkynyl (Alkenyl) Derivatives of 4-Functionalized Pyrazoles.
Article in ChemistryOpen, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Synthesis, Biological Evaluation, and Molecular Docking of Tellurium-Containing Benzothiazole Derivatives as Enzyme Inhibitors of DNA Gyrase and Dihydrofolate Reductase.BioMed research international · 2026Article
- Unexpected Tellurohalogenation of Terminal N-Alkynyl (Alkenyl) Derivatives of 4-Functionalized Pyrazoles.ChemistryOpen · 2025Article
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4 authors.
Funding
Abstract
The efficient synthesis of terminal N-alkenyl and N-alkynyl derivatives of pyrazole-4-carboxylic acids and their methyl esters as substrates for studying electrophilic heterocyclization has been reported. The regiochemistry and stereoselectivity of the tellurium-induced heterocyclization of 1-pentynyl (butynyl, butenyl) substituted pyrazole-4-carboxylic acids and their methyl esters under the action of tellurium (IV) oxide in hydrohalic acid were determined. This electrophilic heterocyclization leads to the formation of tetrahydropyrazolo[1,2-a]pyridazinium and dihydropyrazolo[1,2-a]pyrazolium intramolecular salts, as confirmed by X-ray diffraction (XRD) and comprehensive spectral analysis.
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