Abstract
Reaction of diethyl ethoxymethylenemalonate with sodium azide in trifluoroacetic acid at 20' gives ethyl 5-ethoxyisoxazole-4-carboxylate (67%), diethyl cyanomalonate (21%) and diethyl ethoxyaminomethylenemalonate (5%). The last compound and its tautomer are converted into ethyl l-ethoxy-3-oxo-2, 3-dihydro-1H-pyrazole-4-carboxylatTeh.e product stuctures have been confirmed by synthesis or degradation.
Original language | English |
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Pages (from-to) | 1571-1576 |
Number of pages | 6 |
Journal | Australian Journal of Chemistry |
Volume | 45 |
Issue number | 10 |
DOIs | |
Publication status | Published - 1992 |