Study of the heterocyclization of vic-substituted hydrazides of acetylenylpyrazolecarboxylic acids into N-amino pyrazolopyridinones

Sergei F. Vasilevsky, Elena V. Mshvidobadze, José Elguero

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We report a new and efficient methodology to prepare N-amino pyrazolo[4,3-c]pyridin-4-ones 4 and N-amino pyrazolo[3,4-c]pyridin-4-ones 8 from vic-acetylenyl/hydrazido pyrazoles. The procedure involves the intermediate synthesis of methyl esters of acetylenyl-pyrazole carboxylic acids and the subsequent cyclization under a variety of conditions.

Original languageEnglish
Pages (from-to)1229-1233
Number of pages5
JournalJournal of Heterocyclic Chemistry
Issue number6
Publication statusPublished - 1 Jan 2002
Externally publishedYes


ASJC Scopus subject areas

  • Organic Chemistry

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