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Oxidation of bis‐aroylhydrazones of 3,3‐dimethylpentane‐2,4‐dione and thermal decomposition of the oxidation products
Author(s) -
StephanidouStephanatou J.
Publication year - 1983
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.5570200403
Subject(s) - chemistry , chloroform , methylene , thermal decomposition , decomposition , medicinal chemistry , ethanol , methylene blue , organic chemistry , catalysis , photocatalysis
Abstract Oxidation of the title bis‐aroylhydrazones 2 with lead tetraacetate gives l‐aroyl‐5‐aroylazo‐3, 4, 4, 5‐tetramethyl‐2‐pyrazolines 6 in good yields. The aroylazopyrazolines 6 decompose by refluxing in chloroform or ethanol solution to l‐aroyl‐5‐hydroxy‐3, 4, 4, 5‐tetramethyl‐2‐pyrazolines 3 , l‐aroyl‐5‐methylene‐3, 4, 4‐trimethyl‐2‐pyrazoles 10 and 1‐aroyl‐3, 4, 4, 5‐tetramethyl‐2‐pyrazolines 11 . The spectral data of the prepared compounds, as well as the reaction mechanisms are discussed.