Cyclisation of heterocyclic hydrazones prepared from dimethyl acetylenedicarboxylate
- 1 January 1974
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 1
- p. 297-301
- https://doi.org/10.1039/p19740000297
Abstract
The cyclisation of a number of hydrazones prepared from cyclic aminoguanidines and amidrazones and dimethyl acetylenedicarboxylate has been studied. In many cases conditions have been found for cyclisation to either 1,2,4-triazin-5-ones or 5-hydroxypyrazoles (pyrazolin-5-ones). Individual tautomers of certain products may be isolated in the solid state.Keywords
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