1: potassium ferricyanide, KOH 2: H2 / Raney Ni W-2 / ethanol / Ambient temperature; room temperature, 1 h then 35 degC, 12 h 3: 95 percent / 10percent HCl / H2O / 2 h / Heating 4: 84 percent / hydrazine hydrate, KOH / H2O; ethane-1,2-diol / 120 degC, 1 h then 190-195 degC, 3 h View Scheme

1: 78 percent / benzene / Ambient temperature 2: 1.) H2; 2.) NaBH4 / 1.) Adams catalyst / 1.) EtOH, 24 deg C, 2 h; 2.) RT 3: Hg(OAc)2-EDTA / aq. acetic acid / 1.5 h / Heating 4: 77 percent / H2 / 10 percent Pd-C / ethanol; aq. HClO4 / Ambient temperature View Scheme

1: Hg(OAc)2-EDTA / aq. acetic acid / 1.5 h / Heating 2: 77 percent / H2 / 10 percent Pd-C / ethanol; aq. HClO4 / Ambient temperature View Scheme

1: 1.) H2; 2.) NaBH4 / 1.) Adams catalyst / 1.) EtOH, 24 deg C, 2 h; 2.) RT 2: Hg(OAc)2-EDTA / aq. acetic acid / 1.5 h / Heating 3: 77 percent / H2 / 10 percent Pd-C / ethanol; aq. HClO4 / Ambient temperature View Scheme

1: HCl / aq. ethanol / 2 h / Heating 2: 1.) NH2NH2, 2.) KOH View Scheme

1: 62 percent / sulfur / 80 degC, 1 h then reflux, 4 h 2: 93 percent / 50percent KOH, HCl / H2O; ethanol / 9 h / Heating 3: 97 percent / 10percent HCl / 20 h / Ambient temperature 4: 97 percent / LiAlH4 / diethyl ether / 4 h / Ambient temperature 5: 88 percent / triphenylphosphine, N-bromosuccinimide / benzene / 2 h / Ambient temperature 6: 94 percent / benzene / 72 h / Heating 7: potassium ferricyanide, KOH 8: 82 percent / Raney nickel / aq. ethanol / 6 h / Heating View Scheme

1: 97 percent / 10percent HCl / 20 h / Ambient temperature 2: 97 percent / LiAlH4 / diethyl ether / 4 h / Ambient temperature 3: 88 percent / triphenylphosphine, N-bromosuccinimide / benzene / 2 h / Ambient temperature 4: 94 percent / benzene / 72 h / Heating 5: potassium ferricyanide, KOH 6: 82 percent / Raney nickel / aq. ethanol / 6 h / Heating View Scheme

1: 94 percent / benzene / 72 h / Heating 2: potassium ferricyanide, KOH 3: 82 percent / Raney nickel / aq. ethanol / 6 h / Heating View Scheme

1: 88 percent / triphenylphosphine, N-bromosuccinimide / benzene / 2 h / Ambient temperature 2: 94 percent / benzene / 72 h / Heating 3: potassium ferricyanide, KOH 4: 82 percent / Raney nickel / aq. ethanol / 6 h / Heating View Scheme

1: 97 percent / LiAlH4 / diethyl ether / 4 h / Ambient temperature 2: 88 percent / triphenylphosphine, N-bromosuccinimide / benzene / 2 h / Ambient temperature 3: 94 percent / benzene / 72 h / Heating 4: potassium ferricyanide, KOH 5: 82 percent / Raney nickel / aq. ethanol / 6 h / Heating View Scheme