1: H2 / 5percent Pd/CaCO3 (Pb poisoned) / tetrahydrofuran / 2 h 2: 89 percent / K2CO3 / acetone / 4 h View Scheme

1: H2 / 5percent Pd/CaCO3 (Pb poisoned) / tetrahydrofuran / 2 h 2: 79 percent / K2CO3 / acetone / 3 h View Scheme

With  ammonium cerium(IV) nitrate in  acetonitrile T=0°C; 0.25 h;   

Multi-step reaction with 2 steps 1: 1.) n-butyllithium / 1.) THF, -78 deg C, 5 min, 2.) -78 deg C, 15 min2: aq. ceric ammonium nitrate (CAN), / acetonitrile / 0.25 h / 0 °C  

Multi-step reaction with 3 steps 1: 1.) aq. AgNO3 2.) aq. KCN / 1.) ethanol, 45 min. 2.) 1.5 h2: 1.) n-butyllithium / 1.) THF, -78 deg C, 5 min, 2.) -78 deg C, 15 min3: aq. ceric ammonium nitrate (CAN), / acetonitrile / 0.25 h / 0 °C