tris-(dibenzylideneacetone)dipalladium(0); caesium carbonate; thiourea; 1,1,1-tris (diphenylphosphinomethyl)ethane in 1,4-dioxane T=100°C; 18 h; Inert atmosphere;

carbon disulfide; copper(l) iodide; 1,8-diazabicyclo[5.4.0]undec-7-ene in toluene T=100°C; 48 h; Inert atmosphereSealed tube;