Unexpected cyclization route for o-ethynylbenzoic acids hydrazides in the presence of base

S. F. Vasilevsky, T. F. Mikhailovskaya

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1 Citation (Scopus)


The reaction of o-ethynylbenzoic acids hydrazides with base has been studied. In the presence of a strong donor substituent (1,5-dimethylpyrazol-4- yl) it has been found that an unusual cyclization route occurs to give the corresponding benzopyridazinone instead of the expected isoindolinone.

Original languageEnglish
Pages (from-to)55-58
Number of pages4
JournalChemistry of Heterocyclic Compounds
Issue number1
Publication statusPublished - 1 Jan 2009
Externally publishedYes



  • Arylacetylenes
  • Benzopyridazinones
  • Cross coupling
  • Ethynylbenzoic acids esters
  • Heterocyclization
  • Isoindolinones
  • Reactions with hydrazine

ASJC Scopus subject areas

  • Organic Chemistry

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