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

Journal of the Brazilian Chemical Society

Pérez, Fredy R.¹  Alderete, Joel¹  Zúñiga, Celia¹  Universidad Privada Antenor Orrego, Perú¹  Belmar, Julio¹  Universidad de Concepción, Chile¹ 

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

DOI  :  10.1590/S0103-50532005000200009

学科分类：化学（综合）

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.

【 授权许可】

Unknown