Solvent‐Free Synthesis of Ethyl α‐Cyanocinnamates Catalyzed by K2O–Al2O3 Using Grinding Method

Abstract K2O–Al2O3 catalyzes the Knoevenagel condensation of ethyl cyanoacetate with aromatic aldehydes, giving ethyl α‐cyanocinnamates in 94–98% yield under solvent‐free condition by grinding at room temperature.

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