1: 92 percent / KI / butan-2-one / 3 h / Heating 2: 62 percent / bis(1,8-dimethylamino)-naphthalene / Pd(PPh3)4 / hexamethylphosphoric acid triamide / 1.5 h / 60 °C 3: 41 percent / 10percent Pd-C / various solvent(s) / 7 h / Heating View Scheme