potassium carbonate in acetone T=45°C;

1: 100 percent / K2CO3 / acetone / 45 °C 2: 1.) BuLi 3: 43 percent / Raney nickel View Scheme

1: 100 percent / K2CO3 / acetone / 45 °C 2: 1.) n-butyl lithium / 1.) THF, -78 deg C; 2.) from -78 deg C to room temperature 3: Raney nickel / ethanol / Heating View Scheme

in toluene