1: 56 percent / acetic anhydride, pyridine / toluene / 5 h / Heating 2: 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 3: 52 percent / Ambient temperature View Scheme

1: 56 percent / acetic anhydride, pyridine / toluene / 5 h / Heating 2: 80 percent / N-bromosuccinimide, benzoyl peroxide / CCl4 / 6 h / Heating; Irradiation 3: 52 percent / Ambient temperature 4: 96 percent / conc. H2SO4 / acetic acid; H2O / 4 h / Heating View Scheme