With  hydrogen; palladium dihydroxide in  ethyl acetate 12 h;   

With  pyridinium p-toluenesulfonate in  ethanol T=50 - 55°C; 2 h;   

Multi-step reaction with 2 steps 1: 78 percent / PhSO2Cl / pyridine / 0 - 20 °C2: 90 percent / Pd/C / tetrahydrofuran / 4 h / 20 °C  

Multi-step reaction with 3 steps 1: 1.) 1 N KOH, 2.) p-TsOH / 1.) dioxane, water, RT, overnight, 2.) chloroform, RT, 2 h2: 73 percent / CF3SO3H / CH2Cl2 / 2 h / 0 - 20 °C3: 1.) 1 N KOH / 1.) dioxane, water, RT, 5 h, 2.) THF, HMPA, 24 h  

Multi-step reaction with 2 steps 1: 1.) 1 N KOH, 2.) p-TsOH / 1.) dioxane, water, RT, overnight, 2.) chloroform, RT, 2 h2: 73 percent / CF3SO3H / CH2Cl2 / 2 h / 0 - 20 °C