n-Propyl-4-aza-1-azoniabicyclo[2.2.2]octane chloride-SBA-15 (SBA-DABCO) as basic mesoporous catalyst for the synthesis of 1,4-dihydropyridine hetrocyclic compounds

• Synthesis of 1,4-dihydropyridine (DHP) derivatives
• n-Propyl-4-aza-1-azoniabicyclo[2.2.2]octane chloride-SBA-15 as a basic catalyst
• Inorganic–organic hybrid basic nanocatalyst
• Green catalyst in the synthesis of biologically relevant heterocyclic compounds

Regarding the green chemistry's goals, the development of mesoporous silica materials as attractive candidates in the search for supporting of catalysts is currently a subject of increasing interest. Therefore, in the present research n-propyl-4-aza-1-azoniabicyclo[2.2.2]octane chloride-SBA-15 (SBA–DABCO) was used as a basic catalyst for the synthesis of 1,4-dihydropyridine (DHP) derivatives from one pot, three-component condensation of aromatic aldehydes, ammonium acetate and ethylacetoacetate under solvent-free at 80 °C. This method offers several advantages, including high yield, short reaction time, simple work-up procedure, ease of separation and recyclability of the catalyst, as well as the ability to tolerate a wide variety of substitutions in the reagents.