aluminium trichloride in carbon disulfide 1) 2 h, 5 deg C, 2) 12 h, r.t.;

1: 58 percent / anhydrous K2CO3 / acetone / 58 h / Heating 2: 97 percent / Na2CO3 / H2O / 1 h / Heating 3: 62 percent / CH3CO2Na, Ac2O / 3 h / 160 °C 4: 52 percent / AlCl3 / CS2 / 1) 2 h, 5 deg C, 2) 12 h, r.t. View Scheme

1: 97 percent / Na2CO3 / H2O / 1 h / Heating 2: 62 percent / CH3CO2Na, Ac2O / 3 h / 160 °C 3: 52 percent / AlCl3 / CS2 / 1) 2 h, 5 deg C, 2) 12 h, r.t. View Scheme

1: 62 percent / CH3CO2Na, Ac2O / 3 h / 160 °C 2: 52 percent / AlCl3 / CS2 / 1) 2 h, 5 deg C, 2) 12 h, r.t. View Scheme

1: 52 percent / AlCl3 / CS2 / 12 h / 5 °C 2: 67 percent / Br2 / diethyl ether; dioxane / 1 h / 25 - 30 °C View Scheme