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Abstract magnified image The utilization of arylhydrazononitriles (6‐9) for synthesis of azoles is demonstrated. Thus, arylazomalononitriles (6) reacted with hydroxylamine hydrochloride to afford isoxazol‐5‐imine (10), amidoxime (12) and bis‐amidoxime (13) derivatives depending upon both the reaction conditions and molar ratio employed. 2‐Thiazolyl‐2‐arylhydrazononitriles (7) and cyanoformazans (8) gave 1,2,3‐triazole derivatives (15) and (17) respectively upon treatment with hydroxylamine hydrochloride and concomitant loss of water molecule. Formation of novel 1,2,4‐triazin‐5(4H)‐one derivatives (21) has efficiently been carried out by treatment of amidoximes (18) with acetic anhydride in acetic acid.
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Riyadh et al. (2008) studied this question.
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