Convenient synthesis of 4-amino-3,5-disubstituted pyrazoles in one step from the corresponding diketo oximes

Tahir Majid, Corey R. Hopkins, Brian Pedgrift, Nicola Collar

Research output: Contribution to journalArticle

23 Scopus citations


A convenient one-step protocol for the synthesis of 4-amino-3,5- disubstituted pyrazoles has been developed. This method employs readily available diketo oximes as starting materials, and employs hydrazine hydrate for the cyclization and subsequent reduction of the intermediate nitroso compound.

Original languageEnglish (US)
Pages (from-to)2137-2139
Number of pages3
JournalTetrahedron Letters
Issue number10
Publication statusPublished - Mar 1 2004



  • Hydrazine hydrate
  • Pyrazole
  • Reduction

ASJC Scopus subject areas

  • Biochemistry
  • Drug Discovery
  • Organic Chemistry

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