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Synthesis 1987; 1987(1): 33-35
DOI: 10.1055/s-1987-27831
DOI: 10.1055/s-1987-27831
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The Reactions of Benzylmalononitriles with Hydrazine and Hydroxylamine. Synthesis of Pyrazoles, Isoxazoles, and Pyrazolo[1,5-a]-pyrimidine Derivatives
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Publikationsverlauf
Publikationsdatum:
20. August 2002 (online)
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.