The Reactions of Benzylmalononitriles with Hydrazine and Hydroxylamine. Synthesis of Pyrazoles, Isoxazoles, and Pyrazolo[1,5-a]-pyrimidine Derivatives
- 1 January 1987
- journal article
- research article
- Published by Georg Thieme Verlag KG in Synthesis
- Vol. 1987 (01) , 33-35
- https://doi.org/10.1055/s-1987-27831
Abstract
Benzylmalononitriles react with hydrazine or hydroxylamine to give 4-substituted 3,5-diaminopyrazoles or isoxazoles, respectively. Pyrazolo[1,5-a]pyrimidine derivatives are prepared by reaction of these pyrazoles with some 2,3-disubstituted propenenitriles (including benzylidenemalononitrile) under mild conditions.Keywords
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