1: 56.5 percent / CsF / Pd(PPh3)4 / 1,2-dimethoxy-ethane / 5 h / Heating 2: Me3SO3H / CHCl3 / 1 h / Ambient temperature View Scheme

1: tetrakis(triphenylphosphine) palladium(0); potassium fluoride / 1,4-dioxane / Reflux 2: copper(l) iodide; bis-triphenylphosphine-palladium(II) chloride; diisopropylamine 3: methanol; potassium carbonate / tetrahydrofuran 4: platinum (II) chloride 5: boron tribromide 6: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione View Scheme

1: tetrakis(triphenylphosphine) palladium(0); potassium fluoride / 1,4-dioxane / Reflux 2: copper(l) iodide; bis-triphenylphosphine-palladium(II) chloride; diisopropylamine 3: methanol; potassium carbonate / tetrahydrofuran 4: platinum (II) chloride 5: boron tribromide 6: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione 7: sodium tetrahydroborate / N,N-dimethyl-formamide View Scheme