Abstract
An efficient synthesis of biologically interesting pyridazinoindazolone derivatives was achieved via a one-pot three-component p-toluenesulfonic acid-catalysed reaction of dimedone, differently substituted aldehydes, and 3,6-dihydroxypyridazine under solvent-free conditions. Two plausible mechanisms for the formation of pyridazinoindazolones are proposed.
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