in sulfolane T=230°C; 0.166667 h;

diethylamine in water T=20°C; P=760.051 Torr; 5 h;

1: 2-bromo-benzenethiol With sulfuryl dichloride; triethylamine in dichloromethane T=0 - 20°C; 2: pyrrolidin-1-yl-2,5-dione With triethylamine in dichloromethane T=0 - 20°C; 1 h;

copper; potassium carbonate in N,N-dimethyl-formamide 7 h; Heating;

1: 95 percent / NaBH4 / ethanol; H2O / 3 h / Heating 2: CaCl2, HCl / benzene / 2 h / overnight 3: dimethylformamide / 4 h / Heating 4: 13 percent / acetic anhydride, HBr / acetic acid / 3.5 h / 60 - 70 °C 5: 0.4 g / K2CO3, Cu / dimethylformamide / 7 h / Heating View Scheme

1: CaCl2, HCl / benzene / 2 h / overnight 2: dimethylformamide / 4 h / Heating 3: 13 percent / acetic anhydride, HBr / acetic acid / 3.5 h / 60 - 70 °C 4: 0.4 g / K2CO3, Cu / dimethylformamide / 7 h / Heating View Scheme

1: 13 percent / acetic anhydride, HBr / acetic acid / 3.5 h / 60 - 70 °C 2: 0.4 g / K2CO3, Cu / dimethylformamide / 7 h / Heating View Scheme

1: anhydrous iron chloride; oxygen / dichloromethane / 6 h / 25 °C 2: copper(I) thiophene-2-carboxylate / N,N-dimethyl acetamide / 2 h / 100 °C View Scheme