1: 1.) hydrazine, 2.) dianisyl telluroxide / 1.) ethanol, reflux, overnight, 2.) water, CH2Cl2, 1,2-dibromotetrachloroethane, 5 h 2: 82 percent / triethylamine, anthracene / benzene / 1 h / Irradiation View Scheme

Multi-step reaction with 4 steps 1: 1.) phenyllithium / 1.) THF, 2.) benzene, THF, 3 min2: 85 percent / aq. acetic acid / tetrahydrofuran / 15 h3: H2, NaHCO3; / 5percent Pt/C / benzene; ethanol / 24 h4: NaOH / benzene; methanol / 0.33 h / Ambient temperature  

Multi-step reaction with 3 steps 1: 85 percent / aq. acetic acid / tetrahydrofuran / 15 h2: H2, NaHCO3; / 5percent Pt/C / benzene; ethanol / 24 h3: NaOH / benzene; methanol / 0.33 h / Ambient temperature  

Multi-step reaction with 2 steps 1: H2, NaHCO3; / 5percent Pt/C / benzene; ethanol / 24 h2: NaOH / benzene; methanol / 0.33 h / Ambient temperature