1: 80 percent / gl. AcOH / various solvent(s) / 2 h / 200 °C 2: 78 percent / Lawesson's reagent / various solvent(s) / 0.5 h / 150 °C 3: 80 percent / benzyltriethylammonium chloride (TEBA), 48percent aq. KOH / chlorobenzene / Ambient temperature View Scheme

1: 75 percent / gl. AcOH / various solvent(s) / 2 h / 200 °C 2: 87 percent / Lawesson's reagent / various solvent(s) / 0.5 h / 150 °C 3: 88 percent / benzyltriethylammonium chloride (TEBA), 48percent aq. KOH / chlorobenzene / Ambient temperature View Scheme

1: 60 percent / gl. AcOH / various solvent(s) / 2 h / 200 °C 2: 75 percent / Lawesson's reagent / various solvent(s) / 1 h / 150 °C 3: 87 percent / benzyltriethylammonium chloride (TEBA), 48percent aq. KOH / chlorobenzene / Ambient temperature View Scheme

1: 80 percent / gl. AcOH / various solvent(s) / 2 h / 200 °C 2: 78 percent / Lawesson's reagent / various solvent(s) / 0.5 h / 150 °C 3: 80 percent / benzyltriethylammonium chloride (TEBA), 48percent aq. KOH / chlorobenzene / Ambient temperature 4: 52 percent / p-toluenesulphonic acid, Dowtherm A / 24 h / 200 °C View Scheme

1: 80 percent / gl. AcOH / various solvent(s) / 2 h / 200 °C 2: 78 percent / Lawesson's reagent / various solvent(s) / 0.5 h / 150 °C 3: 82 percent / benzyltriethylammonium chloride (TEBA), 48percent aq. KOH / chlorobenzene / Ambient temperature View Scheme