抽象的な
A simple and clean method for four-component synthesis of pyrano[2,3-c]pyrazole derivatives
Samy A.El-Assaly
A new convenient method for the synthesis of 6-amino-2H,4Hpyrano[2,3- c] pyrazole-5-carbonitriles, namely, four component condensation of aromatic aldehydes, activated methylene reagent, ethyl acetoacetate, and hydrazine hydrate in water in the presence of triethylamine as a catalyst.
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