In this research, different alcohols and phenols are subjected to the reaction with HMDS in the presence of ionic liquid and silica-supported catalysts. Silylation was accomplished under mild reaction conditions at room temperature in short reaction times and good to excellent yields.

A stringent comparison between two pairs of molecular/immobilized water oxidation catalysts reveals distinctive catalytic trends. While the molecular compound 1 exhibits a substantial higher activity than analogous immobilized system 1_SiO2, under all experimental conditions explored, contrary is found with 2 that far less active its counterpart 2_SiO2. This explained by unique tendency to form...

A new one-pot, efficient three-component condensation of dimedone, urazole and aromatic aldehydes in the presence of silica supported sodium hydrogen sulfate as an effective heterogeneous catalyst for the synthesis of novel Triazolo[1,2-a]indazole-1,3,8-trione derivatives under solvent-free conditions is described.