In the present work, we have synthesized different nanoparticles by using different types of plant extracts of Citrus aurantium, Camellia sinensis, Carica papaya, Aloe barbadensis miller by conventional and non-conventional methods. The catalytic character and reusability of these green synthesized nanocatalysts were studied with different reagents under different reaction conditions to afford various series of substituted heterocyclic compounds via...