Tautomerism of 3-alkoxycarbonylmethylene-2-oxo-1,2,3,4-tetrahydroquinoxaline derivatives
- 1 January 1966
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society C: Organic
- p. 806-807
- https://doi.org/10.1039/j39660000806
Abstract
The compound previously formulated as ethyl 1,2-dihydro-2-oxoquinoxalin-3-ylacetate has the isomeric structure 3-ethoxycarbonylmethylene-2-oxo-1,2,3,4-tetrahydroquinoxaline in the solid state. In solution the 1-methyl derivative has been shown by nuclear magnetic resonance studies to exist as a tautomeric mixture of unsaturated and saturated esters.Keywords
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