Synthesis of hydroxypyrazoles and 1-meth
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Alex F.C. Flores; Nilo Zanatta; Adriano Rosa; Sergio Brondani; Marcos A.P. Marti
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Article
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2002
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Elsevier Science
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French
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The synthesis of a new series of hydroxypyrazoles (2a-f) and 2-methyl-3-isoxazolones (3a-d) from the cyclocondensation reaction of trichloromethyl-substituted 1,3-dielectrophiles (1a-f) with dry hydrazine and N-methylhydroxylamine is reported. The regiospecific cyclocondensation took place with the