Abstract
Abstractω‐Cyanoacetophenone was coupled with a variety of aromatic diazonium chlorides to give the corresponding arylazo derivatives 1 a–g. Analysis of the IR and UV spectra of these compounds indicated that they exist mainly as the corresponding arylhydrazones. Compounds 1 a–d, f, g reacted with diazomethane to yield the N‐methyl‐arylhydrazones 2 a–f. 3‐Amino‐4‐arylazo‐5‐phenylpyrazoles 5 a–g and 4‐arylazo‐5‐imino‐1,3‐diphenyl‐2‐pyrazolines 6 a–g were obtained by the interaction of 1 a–g with hydrazine hydrate and with phenylhydrazine, respectively.
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