Pyrazolo‐N‐hydroxyuracils from the modified lossen rearrangement of vicinal pyrazoledicarbohydroxamates
- 1 September 1967
- journal article
- research article
- Published by Wiley in Journal of Heterocyclic Chemistry
- Vol. 4 (3) , 325-334
- https://doi.org/10.1002/jhet.5570040303
Abstract
The reaction of 1‐phenyl‐3,4‐ and 4,5‐pyrazoledicarbohydroxamates, II and VIII, with benzene‐ and methanesulfonyl chlorides is reported. Each hydroxamate yielded two isomeric N‐phenyl‐N‐hydroxypyrimidinediones whose structures were established. The NMR spectra of a number of isomeric pyrazole derivatives are discussed.Keywords
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