A. Donkor, R. Prager, M. Thompson
1992
Citations
0
Influential Citations
3
Citations
Journal
Australian Journal of Chemistry
Abstract
Reaction of diethyl ethoxymethylenemalonate with sodium azide in trifluoroacetic acid at 20o gives ethyl 5-ethoxyisoxazole-4-carboxylate (67%), diethyl cyanomalonate (21%) and diethyl ethoxyaminomethylenemalonate (5%). The last compound and its tautomer are converted into ethyl 1-ethoxy-3-oxo-2,3-dihydro-1H-pyrazole-4-carboxylate. The product structures have been confirmed by synthesis or degradation.