Cyclization of acetylenylpyrazolecarboxylic acids

M. S. Shvartsberg, S. F. Vasilevskii, T. V. Anisimova, V. A. Gerasimov

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Abstract

Acetylenyl-N-methylpyrazolecarboxylic acids containing an acetylenic substituent and a carboxyl group on adjacent carbon atoms cyclize in pyridine in the presence of copper phenylacetylenide to pyranopyrazoles. The same compounds are obtained by the acetylenide cyclocondensation of the appropriate iodopyrazolecarboxylic acids, but at a much lower rate.

Original languageEnglish
Pages (from-to)1071-1076
Number of pages6
JournalBulletin of the Academy of Sciences of the USSR Division of Chemical Science
Volume30
Issue number6
DOIs
Publication statusPublished - 1 Jun 1981
Externally publishedYes

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ASJC Scopus subject areas

  • Chemistry(all)

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