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This article proposes a new and facile method to prepare a carbon-based catalyst entitled graphene oxide quantum dots that contain nitrogen-doped groups (GOQDs-N-doped), and which are bioactive and safe possessing economical free transition metal properties. In this study, GOQDs-Ndoped was synthesized by means of the pyrolysis of citric acid at 180°C in the presence of ammonia. The prepared catalyst, which embodies an amorph and 3D structure, acts similar to nanoreactors, and was successfully used in the synthesis of tetrahydropyridines (THP) derivatives with antimicrobial, anticancer, antifungal and anti-Alzheimer’s properties through five-component reactions. We believe that the production of affordable and green carbocatalysts to be used in multi-component reactions and in chemical and pharmaceutical industries can be promising. Finally, we were able to synthesize highly substituted and efficient Tetrahydroperidines by utilizing laboratory-produced carbocatalysts.