Synthesis of new 4‐vinyl‐1,2,3‐thiadiazoles

Marina A. Tokareva, Sinead T. Keaveney*, Indrek Pernik, Barbara A. Messerle, Tatiana V. Glukhareva*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Simple and convenient methods for the synthesis of a range of new 1,2,3-thiadiazole derivatives, including ethyl esters, alcohols, and aldehydes, were developed. Moreover, twenty-nine new structurally diverse 4-vinyl-1,2,3-thiadiazoles were successfully synthesized in 18–89 % yield via Knoevenagel condensation. NOESY-experiments were performed for E/Z-assignment of isomeric mixtures. The structure of five of the new vinylic derivatives has been confirmed using X-ray diffraction analysis. Using the example of ethyl (E)-2-cyano-3-(5-(pyrrolidin-1-yl)-1,2,3-thiadiazol-4-yl)acrylate, the possibility of dimerization with the formation of diethyl(1R,2R,3S,4S)-1,3-dicyano-2,4-bis(5-(pyrrolidin-1-yl)-1,2,3-thiadiazol-4-yl)cyclobutane-1,3-dicarboxylate was demonstrated, allowing the first 1,2,3-thiadiazole substituted cyclobutane to be synthesized.
Original languageEnglish
Pages (from-to)10527-10531
Number of pages5
JournalChemistrySelect
Volume6
Issue number39
DOIs
Publication statusPublished - 20 Oct 2021

Keywords

  • heterocycles
  • Knoevenagel condensation
  • dimerization
  • thiadiazoles

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