Trimethylsilylethynyl(phenyl)iodonium Tetrafluoroborate is used in synthesis of 1-Alkynyl(triphenyl)arsonium Tetrafluoroborates by onium transfer reaction of 1-Alkynyl(phenyl)iodonium Tetrafluoroborates with Triphenylarsine. Also, used in preparation of Furan- and Thiophene-substituted alkynes and alkynyl ketones by Copper Iodide-catalyzed coupling and carbonylation of Heterocyclic Boronic Acids with Alkynyliodonium salts.