copper(l) iodide; potassium carbonate; triphenylphosphine; tris-(dibenzylideneacetone)dipalladium(0) in N,N-dimethyl-formamide T=90 - 100°C; Sonogashira cross-coupling; 2 h;

1,8-diaza-bicyclo[5.4.0]undecene in 1,4-dioxane T=20°C; 1 h;