Carbon-carbon bond forming reactions catalyzed by ordered porous silicate-quaternary ammonium composite

摘要

The Knoevenagel condensation of carbonyl compounds with active methylene compounds catalyzed by as-synthesized, ordered porous silicate-quaternary ammonium composite materials gave corresponding alpha, beta-unsaturated esters in high yields under very mild liquid phase conditions. The activity was as high as that of aminopropyl-functionalized porous silicates. In the case of other carbon-carbon bond forming reactions such as Claisen-Schmidt reaction and Michael reaction, the activity of the composite materials was much higher than that of aminopropyl-functionalized silicates.