Nano‐Zn[2‐boromophenylsalicylaldiminemethylpyranopyrazole]Cl₂ as a novel nanostructured Schiff base complex and catalyst for the synthesis of pyrano[2,3‐<i>d</i>]pyrimidinedione derivatives

Nano‐Zn[2‐boromophenylsalicylaldiminemethylpyranopyrazole]Cl 2 (nano‐[Zn‐2BSMP]Cl 2 ) as a novel nanostructured Schiff base complex was prepared and characterized using several techniques. Nano‐[Zn‐2BSMP]Cl 2 was used as an effective catalyst for the preparation of some pyrano[2,3‐ d ]pyrimidinedione derivatives by the multicomponent reaction of malononitrile, aryl aldehydes and barbituric acid derivatives. The novelty and efficiency of nano‐[Zn‐2BSMP]Cl 2 as a catalyst, in comparison with some other reported catalysts, for this synthetic transformation are the main features of this work.

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