ChemInform Abstract: Synthesis of Some Pyrazolopyridine Sulfonamide Derivatives.

Abstract

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Synthesis and Antioxidant Activity of a Novel Series of Pyrazolotriazine, Coumarin, Oxoazinone, and Pyrazinopyrimidine Derivatives

“…An analogous reaction has been reported by El‐Deen et al , where as the 4,6‐dimethyl‐1 H ‐pyrazolo[3,4‐ b ]pyridine‐3‐diazonium chloride 3 was coupled with ethyl cyanoacetate to give the corresponding hydrazono derivative 11 . Compound 11 gave the corresponding aminopyrazolotriazine derivative 12 upon refluxing in acetic acid and did not afford the pyrazolotriazinone 9 (Scheme ).…”