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Resumen de Facile synthesis of isoxazoles and pyrazoles from ß-diketohydrazones

Carlos Bustos, Eduardo Schott V, Marcela Ríos, Christian Sánchez, Juan-guillermo Cárcamo

  • New 3,5-dimethyl-4-[(E)-4-(R1-phenyl)diazenyl]isoxazoles and 3,5-dimethyl-1-(R2-phenyl)-4-[(E)-(R1-phenyl)diazenyl]-1H-pyrazoles may be obtained by reaction of 3-[2-(R1-phenyl)hydrazono)]pentane-2,4-dione with H2NOH-HCl and R2-4-C6H4-NHNH2, respectively. The reactions were performed in ethanol as solvent and catalyzed by glacial acetic acid.


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