phosphorus pentachloride; trichlorophosphate T=80 - 90°C; 48 h;

copper(l) iodide; potassium carbonate; triphenylphosphine; tris-(dibenzylideneacetone)dipalladium(0) in N,N-dimethyl-formamide T=25°C; Sonogashira cross conjugation; 2 h;