Spiro-fused (C2)-azirino-(C4)-pyrazolones, a new heterocyclic system. Synthesis, spectroscopic studies and X-ray structure analysis

Reaction of 1-substituted 4-acyl-5-hydroxy-3-methyl-1H-pyrazoles (2) with hydroxylamine gives the corresponding "oximes" 3, which are mainly present as (Z)-2,4-dihydro-4-[(hydroxyamino)methylene]-3H-pyrazol-3-ones. Treatment of compounds 3 with trichloroacetyl isocyanate/potassium carbonat...

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Veröffentlicht in:	Journal of organic chemistry 2003-10, Vol.68 (21), p.7943-7950
Hauptverfasser:	HOLZER, Wolfgang, CLARAMUNT, Rosa M, PEREZ-TORRALBA, Marta, GUGGI, Davide, BREHMER, Thomas H
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemistry Exact sciences and technology Heterocyclic compounds Heterocyclic compounds with several n hetero atoms in the same ring, in separated rings or in fused rings Organic chemistry Preparations and properties
Online-Zugang:	Volltext
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