Hamid Reza Molaei - Department of Chemistry, Sarvestan Branch, Islamic Azad University, Sarvestan, Iran

Nanostructured sawdust-BF3 has been prepared and shown to efficiently catalyse the one-pot reaction of 1,3-diketones and hydrazines under solvent-free conditions, to afford the corresponding 2,3,5-substituted-2Hpyrazole derivatives in excellent yields.

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