Multi-step reaction with 7 steps 1: 100 percent / pyridine / CH2Cl2 / 1.33 h2: N-bromosuccinimide, benzoyl peroxide / CCl4 / 2 h / Heating3: 56 percent / CH2Cl2; diethyl ether / 48 h4: 100 percent / pyridine / CH2Cl2 / 1.5 h / Ambient temperature6: 95 percent / BF3*Et2O / CH2Cl2 / 0.5 h7: H2 / 10percent Pd-C / ethyl acetate; aq. ethanol / 6 h / 2250.2 Torr / Ambient temperature