N-bromosuccinmide; 2,2'-azo-bisisobutyronitrile in tetrachloromethane 24 h; Heating / reflux;

1: 29 percent / P4S10 / benzene / 18 h / Heating 2: 49 percent / N-methylpyrrolidinone, NaH / 1.5 h / 150 °C 3: 23 percent / N-bromosuccinimide, benzoyl peroxide / CCl4 / 14 h / Heating; Irradiation View Scheme

1: K3Fe(CN)6 2: 23 percent / N-bromosuccinimide, benzoyl peroxide / CCl4 / 14 h / Heating; Irradiation View Scheme

1: 49 percent / N-methylpyrrolidinone, NaH / 1.5 h / 150 °C 2: 23 percent / N-bromosuccinimide, benzoyl peroxide / CCl4 / 14 h / Heating; Irradiation View Scheme