potassium tert-butylate in toluene 0.25 h; Heating;

pyridine in dichloromethane 0.5 h; Heating;

1: N-bromosuccinimide (NBS), peroxyde de benzoyle / CCl4 2: 69 percent / toluene / 1.) 3h, RT, 2.) 2h, reflux 3: 94 percent / 48percent HBr, Zn / ethanol / 2 h / Heating 4: 91 percent / pyridine / CH2Cl2 / 0.5 h / Heating View Scheme

1: 94 percent / 48percent HBr, Zn / ethanol / 2 h / Heating 2: 91 percent / pyridine / CH2Cl2 / 0.5 h / Heating View Scheme

1: 69 percent / toluene / 1.) 3h, RT, 2.) 2h, reflux 2: 94 percent / 48percent HBr, Zn / ethanol / 2 h / Heating 3: 91 percent / pyridine / CH2Cl2 / 0.5 h / Heating View Scheme