Multicomponent One-pot One-step Synthesis of 1,2,3-Triazoles via Cu/Pd Catalysis

In modern synthetic chemistry, the formation of multiple C-C bonds in a limited number of steps to access both diversity and complexity has become an important challenge. In recent years, significant research has been devoted to the synthesis of 1,2,3-triazole containing compounds in a multimetal-catalyzed domino sequence due to the remarkable biological activity and pharmaceutical potency of these compounds. Considering the increasing significance of 1,2,3-triazoles in synthetic chemistry, mixing all of the starting components in a one-pot, one-step process to create the final triazole product will be highly efficient with respect to time, cost and simplicity of performance. A number of published papers illustrated the diverse applications of 1,2,3-triazoles (e.g., palladium-mediated couplings and direct C-H bond functionalization). Similarly, this work demonstrates the development of a highly efficient and practical approach to the synthesis of these versatile triazole-containing motifs via a one-pot, one-step cascade process that involves Sonogashira, Heck and carbopalladation/annulation reactions.