W. Holzer, E. Schmid
Jul 1, 1995
Citations
0
Influential Citations
12
Citations
Journal
Journal of Heterocyclic Chemistry
Abstract
The synthesis of a series of ethyl N-1-(hetero)aryl-5-hydroxy-1H-pyrazole-4-carboxylates by reaction of diethyl ethoxymethylenemalonate with the appropriate hydrazines is described. According to nmr-spectro-scopic investigations (1H- and 13C-nmr) the title compounds exist as 5-hydroxy tautomers in deuteriochlo-roform as well as in deuteriodimethyl sulfoxide solution.