Alkynylation of heterocyclic compounds using hypervalent iodine reagentElectronic supplementary information (ESI) available: 1H and 13C NMR spectra of 11, 13a-h, 14-18. CCDC 1038569. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c4ob02625j

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. 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.