1: 61 percent / CuI, Et2NH / PdCl2(PPh3)2 / 24 h / Ambient temperature 2: tetrahydrofuran / 3 h / Heating 3: PdCl2(PPh3)2 / tetrahydrofuran / 16 h / Heating 4: 84 percent / hydrogen / Pd(OH)2/C / ethyl acetate / 1 h / Ambient temperature View Scheme