1: (E,E)-2,6-bis(chloromethylidene)-1,4-dithiane With copper(l) iodide; tetrakis(triphenylphosphine) palladium(0); diethylamine in 1,4-dioxane Sonogashira Cross-Coupling; 0.5 h; Inert atmosphere; 2: phenylacetylene in 1,4-dioxane T=20°C; 24 h;