1: With triethylsilyl chloride; copper(I) bromide in tetrahydrofuran T=-78 - 20°C; 0.666667 h; 2: With water in tetrahydrofuran

hydrogenchloride; magnesium in tetrahydrofuran; water; Petroleum ether

1: 88 percent / 20percent KOH / methanol / 24 h / Heating 2: 1.) benzene, reflux, 6 h, 2) acid, reflux, 6h View Scheme

1: N-bromosuccinimide, dibenzoyl peroxide / CCl4 / 0.5 h / Heating; Irradiation 2: 88 percent / 20percent KOH / methanol / 24 h / Heating 3: 1.) benzene, reflux, 6 h, 2) acid, reflux, 6h View Scheme

1: sodium borohydride / methanol / 16 h / Ambient temperature 2: 85 percent / toluene-p-sulphonic acid / benzene / 8 h / Heating 3: N-bromosuccinimide, dibenzoyl peroxide / CCl4 / 0.5 h / Heating; Irradiation 4: 88 percent / 20percent KOH / methanol / 24 h / Heating 5: 1.) benzene, reflux, 6 h, 2) acid, reflux, 6h View Scheme

1: 85 percent / toluene-p-sulphonic acid / benzene / 8 h / Heating 2: N-bromosuccinimide, dibenzoyl peroxide / CCl4 / 0.5 h / Heating; Irradiation 3: 88 percent / 20percent KOH / methanol / 24 h / Heating 4: 1.) benzene, reflux, 6 h, 2) acid, reflux, 6h View Scheme

1.) benzene, reflux, 6 h, 2) acid, reflux, 6h; Multistep reaction;

pyridinium tribromide in chloroform T=20°C; 6 h;