Copper(II)-catalyzed molecular rearrangements: the behaviour of arylhydrazones of some 3-benzoylazoles in the presence of copper(II) acetate
- 1 January 1993
- journal article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 1
- No. 20,p. 2491-2493
- https://doi.org/10.1039/p19930002491
Abstract
The reactivity of arylhydrazones of some 3-benzoylazoles (1,2,4-oxadiazole, isoxazole and 1,2,5-oxadiazole) induced by copper(II) catalysis has been investigated. In the 1,2,4-oxadiazole and isoxazole systems, copper(II) acetate monohydrate in methanol effectively induces molecular rearrangements of the arylhydrazones into the corresponding 1,2,3-triazoles, that is, without competitive oxidation processes. In the 1,2,5-oxadiazole series, no ring transformation occurs by the action of the same salt, the expected rearrangement into triazole oximes being achieved rather with sodium ethoxide in ethanol.Keywords
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