1: 86 percent / K-tert-butoxide / 1,2-dimethoxy-ethane 2: 80 percent / tetrakis(triphenylphosphine)palladium, piperidine, copper iodide / benzene / Ambient temperature 3: 85 percent / LiAlH4 / tetrahydrofuran / 2 h / Heating 4: 33 percent / tetrakis(triphenylphosphine)palladium, n-butylamine, copper iodide / benzene / Ambient temperature 5: 70 percent / Zn dust / methanol; H2O / Ambient temperature 6: 95 percent / K2CO3 / methanol; H2O / 18 h / Ambient temperature View Scheme

With  potassium tert-butylate in  tetrahydrofuran T=-78 - 0°C;