1: 84 percent / NBS, azobis(isobutyronitrile) / CCl4 / 2 h / Heating; Irradiation 2: 1.) LDA, HMPT, 2.) / 1.) THF, 0 deg C, 1 h, 2.) -78 deg C, 0.5 h 3: Raney nickel / ethanol; acetone / 1 h / 60 °C 4: 81 percent / sodium hydride / tetrahydrofuran; dimethylsulfoxide / 1 h / Ambient temperature 5: 72 percent / Raney nickel / acetone; ethanol / 1 h / Heating View Scheme