Heterocyclization of 3-trifluoroacetyllactams By Hydrazines

Bouillon, Jean-Philippe;Frisque-Hesbain, Anne-Marie;Janousek, Zdenek;Viehe, Heinz G.

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Authors
  • Bouillon, Jean-Philippe
    Author
  • Frisque-Hesbain, Anne-MarieUCLouvain
    Author
  • Janousek, ZdenekUCLouvain
    Author
  • Viehe, Heinz G.
    Author
Abstract
3-Trifluoroacetyllactams may heterocyclize with hydrazine or with its methyl or phenyl derivative either without ring opening to annelated trifluoromethylpyrazoles or by Ring Opening - Ring Closure (RORC) reaction to zwitterionic salts of 4-omega-alkylamino-5-hydroxy-3-trifluoromethylpyrazoles.
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