Heterogeneous silica-supported copper catalyst for the ultrasound-mediated rapid reaction between dimedone, formaldehyde, and amines at room temperature
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A copper-incorporated mesoporous silica catalyst was synthesized and characterized by N2 adsorption analysis, HRTEM, EDX-elemental analysis, and XRD studies. The silica material possesses mesopores of dimension 3–5 nm. Incorporation of copper within the silica network produces enhanced surface acidity in comparison to pure silica, which is reflected in the sonication-assisted rapid reaction between 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.
KeywordsUltrasound-assisted synthesis Heterogeneous catalyst Mesoporous silica-supported copper catalyst Multicomponent synthesis
We thank the Council of Scientific and Industrial Research, New Delhi for fellowship (SRF to SR and SPM to BB). We also acknowledge TEQIP for instrumental facility.
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