The alkynylation of various nitrogen- and/or sulphur-containing heterocyclic compounds using hypervalent iodine TMS-EBX by utilization of tertiary amines under mild conditions is described. The developed metal-free methodology furnishes the corresponding alkynylated heterocycles bearing quaternary carbon in high yields.
M. Kamlar, I. Císařová and J. Veselý, Org. Biomol. Chem., 2015, 13, 2884 DOI: 10.1039/C4OB02625J
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