Allenes. Part 39. The synthesis of 3-alkyl-5-aminopyrazoles and 3H-indoles from allenic or acetylenic nitriles
- 1 January 1981
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 1
- p. 2997-3001
- https://doi.org/10.1039/p19810002997
Abstract
Hydrazine adds to allenic or acetylenic nitriles to give 3-alkyl-substituted 5-aminopyrazoles in excellent yields. Conjugated and unconjugated enaminic nitriles may be isolated from the Michael addition of phenylhydrazine to allenic nitriles and ring-closed to give 3-alkyl-5-amino-N-phenylpyrazoles and 3H-indoles.Keywords
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