Coupling of alkynyl moieties to heterocyclic rings, without using transition metals, can be easily performed by the reaction of aryl or heteroaryl sulfonylacetylenes with heteroaryl-Li compounds or their corresponding less reactive magnesium derivatives.
L. Marzo, I. Pérez, F. Yuste, J. Alemán and J. L. García Ruano, Chem. Commun., 2015, 51, 346 DOI: 10.1039/C4CC07574A
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