Abstract
Novel ultrathin Cd-Ag-MOF@ZnO composite nanoribbons (Ut-Nr Cd-Ag-MOF@ZnO C) were prepared and characterized in this research to serve as organocatalyst in Hantzsch condensation for selective synthesis of asymmetric polyhydroquinolines through a one-pot multi-component condensation reaction of various substituted arylaldehyde, 5,5-dimethyl-1,3-cyclohexanedione, ammonium acetate and ethyl acetoacetate under solvent-free conventional heating in relatively short reaction times. The developed catalysts were easily recycled and reutilized at least three times under optimized reaction conditions with no noticeable decline in their initial catalytic activities. Operational simplicity and environmental compatibility, combined with the application of a reusable and affordable heterogeneous catalyst, significant efficiency, relatively short reaction time, and good yield are among the main characteristics of the proposed synthetic approach.
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