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Pyrazolo‐ N ‐hydroxyuracils from the modified lossen rearrangement of vicinal pyrazoledicarbohydroxamates
Author(s) -
Bauer Ludwig,
Mahajanshetti C. S.
Publication year - 1967
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570040303
Subject(s) - chemistry , vicinal , benzene , medicinal chemistry , pyrazole , nmr spectra database , stereochemistry , organic chemistry , spectral line , physics , astronomy
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.