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Alkynes are one of the most fundamental and diverse functional groups utilized in organic synthesis. Over the past few years, the development of efficient synthetic methodologies for the functionalization of alkynes has been an active area of research. A plethora of alkyne functionalization reactions have been reported in the literature to construct functionalized alkynes and alkene scaffolds, which are important building blocks in many natural products, pharmaceuticals, and key intermediates in various synthetic transformations. In this review, we describe the most recent advances in the functionalization of alkynes with an emphasis on substrate scope, limitations, regioselectivity control and applications of these reactions. This review covers the literature from 2016 to 2021.

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