Heterogeneous silica-supported copper catalyst for the ultrasound-mediated rapid reaction between dimedone, formaldehyde, and amines at room temperature
acidity in comparison to pure silica, which is reflected in the sonication-assisted rapid reactionbetween dimedone, formaldehyde, and amines. Sonication-mediated room temperature synthesis was proved to be more convenient and rapid than ordinary stirring. A standard leaching experiment proved that the reaction was heterogeneous with this recyclable catalyst. Graphical abstract