Solvent-free cross aldol condensation of aldehydes and ketones over SrMo1-xNixO3-δ perovskite nanocrystals as heterogeneous catalysts

Efficient Self-Condensation of Cyclohexanone into Biojet Fuel Precursors over Sulfonic Acid-Modified Silicas: Insights on the Effect of Pore Size and Structure

“…The aldol condensation of CHO can be acid or base catalyzed, and acid catalysts like sulfuric acid, zeolites, heteropoly acids, or ion exchange resins have been used, whereas sodium hydroxide or hydrotalcite are examples of base catalysts. In general, basic catalysts often require elevated temperature or long reaction time to obtain an acceptable conversion value . However, under these conditions, the formation of larger polycyclic alkanes, nonvalid as a suitable jet fuel precursor, are favored.…”

“…In general, basic catalysts often require elevated temperature or long reaction time to obtain an acceptable conversion value. 20 However, under these conditions, the formation of larger polycyclic alkanes, nonvalid as a suitable jet fuel precursor, are favored. Within acid catalysts, both Brønsted and Lewis acid centers can catalyze aldol condensation, but their mechanisms are different.…”