N-bromosuccinmide; meta-chloroperoxybenzoic acid in tetrachloromethane 6 h; HeatingIrradiation;

1: 65 percent / BuLi / tetrahydrofuran / 3 h / 60 °C 2: 56 percent / acetic anhydride, pyridine / toluene / 5 h / Heating 3: 80 percent / N-bromosuccinimide, benzoyl peroxide / CCl4 / 6 h / Heating; Irradiation View Scheme

1: 56 percent / acetic anhydride, pyridine / toluene / 5 h / Heating 2: 80 percent / N-bromosuccinimide, benzoyl peroxide / CCl4 / 6 h / Heating; Irradiation View Scheme

Ambient temperature;

in ethanol; water 3 h; Heating;

1: 73 percent / H2O; ethanol / 3 h / Heating 2: 10 percent / cc. H2SO4, acetic acid, H2O / 3.5 h / Heating View Scheme