Triazoles as promising small molecules anticancer agents

The 1,2,3-triazole scaffold has emerged as a pivotal heterocyclic motif in medicinal chemistry due to its unique physicochemical properties, synthetic accessibility, and broad spectrum of biological activities. These five-membered nitrogen-rich rings are most commonly synthesized via the copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC), a prototypical "click" reaction that offers regioselective access to 1,4-disubstituted triazoles under mild conditions. The resulting triazole ring is chemically stable, metabolically resilient, and capable of mimicking amide bonds, making it a valuable bioisostere in drug design. Biologically, 1,2,3-triazoles have demonstrated diverse pharmacological profiles, including antimicrobial, anticancer, antiviral, anti-inflammatory, and enzyme inhibitory activities. Their ability to engage in hydrogen bonding and π–π stacking interactions enhances their binding affinity to biological targets. Moreover, triazole-containing compounds have been successfully incorporated into peptidomimetics, nucleoside analogs, and targeted drug delivery systems. Recent advances in metal-free and biocompatible triazole synthesis have further expanded their utility in chemical biology and pharmaceutical development. This abstract highlights the dual significance of 1,2,3-triazoles as both versatile synthetic intermediates and potent pharmacophores, underscoring their continued relevance in the discovery and optimization of therapeutic agents.