tetrabutyl ammonium fluoride in tetrahydrofuran T=60°C; 6 h;

potassium carbonate in methanol 12 h;

potassium hydroxide; copper(l) iodide; triethylamine; bis-triphenylphosphine-palladium(II) chloride 1.) 100 degC, 3 h; 2.) MeOH, r.t.; Yield given. Multistep reaction;