Synthesis and tautomeric studies of enamines from 1-(n-Hexyl)-3-methyl-2-pyrazolin-5-one

Journal of the Brazilian Chemical Society

Julio Belmar²  Fredy R. Pérez¹  Joel Alderete²  Celia Zúñiga² 

[1] ,Universidad de Concepción Faculty of Chemical Sciences Department of Organic Chemistry,Chile

关键词: pyrazolones;    alkylpyrazolones;    acylation;    acylpyrazolones;    enamines;   

DOI  :  10.1590/S0103-50532005000200009

来源: SciELO

【 摘 要 】

1-(n-Hexyl)-3-methyl-2-pyrazolin-5-one was acylated with acid chlorides. Condensation of acyl derivatives with primary amines afforded enamines. According to the ¹H and 13C NMR data, the acyl derivatives have mainly a 4-acylpyrazol-5-ol structure with intramolecular hydrogen bond, and the 4-aminomethylene derivatives exist predominantly in the enamine form stabilized by the same type of interaction.

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