**3. Role of click reactions in synthetic chemistry**

Click chemistry includes a cluster of powerful linking chemical reactions that are easy to perform, have high yields, require no or minimal purification, and are flexible in the unification of different structures without the prerequisite of protection steps. Molecular diversity, modularity, and efficiency are essential in synthetic organic chemistry and expected to be involved in the preparation of several complexes and multi-purpose compounds. In general "Click Chemistry" is a class of biocompatible reactions, to link desired substrates with particular biomolecules. Natural products are produced by joining tiny modular units *via* biosynthesis as well as photosynthesis [18]. Click chemistry provides a route for the synthesis of several heterocyclic scaffolds, amino acids, triazole-fused heterocycles, peptides, and chromophores [19, 20].
