Nanocomposites play a vital role as catalysts during organic synthesis. Catalytic applications remain an emerging area of interest, especially the synergism between morphological aspects and catalytic performance. The strong interfacial interaction of reactant with the surface of nanocomposites during reaction gives an enhancement in rate and yield of the product. This book explores the advantages of nanocomposite catalysts when compared with conventional catalysts, covering oxidation, reduction, hydrogenation, coupling, and rearrangement reactions catalysed by nanocomposite catalysts along with synthesis of rings, heterocyclic systems and name reactions.