1: AlCl3 / CS2 / 3 h / Heating 2: 1.8 g / O2, K / 2-methyl-propan-2-ol / 4 h / Ambient temperature 3: 1.0 g / conc. HCl / 3 h / Heating 4: 1.) SnCl2, conc. HCl; 2.) 50percent KOH / 1.) EtOH, r.t., 1 h; 2.) reflux, 1 h 5: 2 mg / NaBH4, PdCl2 / methanol / 1 h / Ambient temperature 6: 393 mg / BBr3 / CH2Cl2 / 2 h / Ambient temperature View Scheme

aluminium trichloride in carbon disulfide 3 h; Heating; Yield given;

1: AlCl3 / CS2 / 3 h / Heating 2: 1.8 g / O2, K / 2-methyl-propan-2-ol / 4 h / Ambient temperature 3: 1.0 g / conc. HCl / 3 h / Heating 4: 1.) SnCl2, conc. HCl; 2.) 50percent KOH / 1.) EtOH, r.t., 1 h; 2.) reflux, 1 h 5: 2 mg / NaBH4, PdCl2 / methanol / 1 h / Ambient temperature 6: 393 mg / BBr3 / CH2Cl2 / 2 h / Ambient temperature 7: 74 mg / K2CO3 / acetone / 3 h / Heating View Scheme

1: AlCl3 / CS2 / 3 h / Heating 2: 1.8 g / O2, K / 2-methyl-propan-2-ol / 4 h / Ambient temperature 3: 1.0 g / conc. HCl / 3 h / Heating 4: 1.) SnCl2, conc. HCl; 2.) 50percent KOH / 1.) EtOH, r.t., 1 h; 2.) reflux, 1 h 5: 2 mg / NaBH4, PdCl2 / methanol / 1 h / Ambient temperature View Scheme

1: conc. NH4OH / toluene 2: 72 percent / LiAlH4 / diethyl ether / 4 h / 25 °C View Scheme

1: AlCl3 / CS2 / 3 h / Heating 2: 1.8 g / O2, K / 2-methyl-propan-2-ol / 4 h / Ambient temperature 3: 1.0 g / conc. HCl / 3 h / Heating 4: 1.) SnCl2, conc. HCl; 2.) 50percent KOH / 1.) EtOH, r.t., 1 h; 2.) reflux, 1 h 5: 2 mg / NaBH4, PdCl2 / methanol / 1 h / Ambient temperature 6: 393 mg / BBr3 / CH2Cl2 / 2 h / Ambient temperature 7: 74 mg / K2CO3 / acetone / 3 h / Heating 8: 9.0 mg / ethanol / 8 h / Heating View Scheme