Abstract
A series of 5-amino-1-aroylpyrazoles 3 are synthesized directly by the reaction of β-aminocrotononitrile 1 with some structures containing the hydrazine moiety (X-NHNH 2) 2 by refluxing ethanol in presence of sodium acetate. When semicarbazide 3i was used (X = CONH 2), the reaction afforded the unexpected 7-aminopyrazolo[1,5- a]pyrimidine 4.
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