1: 70 percent / NaN(TMS)2 / tetrahydrofuran / 20 °C 2: 65 percent / NaHCO3 / Pd(OAc)2 / various solvent(s) / 15 h / 95 °C 3: 36 percent / CH2Cl2 / 4 h / Irradiation View Scheme

With  sodium dithionite; sulfuric acid  2.) 20 -> 60 deg C;  Yield given. Multistep reaction;