( E,E)-1-Arylseleno-substituted 1,5-dien-3-ynes can be stereoselectively synthesised in one pot, in good yields with high stereoselectivity, by the Pd(PPh3)4-catalysed Stille coupling of ( E)-1-iodo-2-arylselenoethenes with trimethyl-stannyl(trimethylsilyl)ethyne, followed by the cross-coupling with ( E)-vinyl iodides in the presence of tris(diethylamino) sulfonium trimethyldifluorosilicate (TASF).