sodium hydrogencarbonate in benzene T=100°C; 4 h;

1: 2.) SO2Cl2 / 1.) CHCl3, RT, 24 h, 2.) CHCl3, 2 h 2: 89 percent / aq. NaHCO3 / benzene / 4 h / 100 °C View Scheme

bromine; chlorine; sodium carbonate 1.) CH2Cl2, -40 degC, 2.) 12 h, reflux; Yield given. Multistep reaction. Further byproducts given. Yields of byproduct given. Title compound not separated from byproducts;

bromine; chlorine; sodium carbonate 1.) CH2Cl2, -40 degC, 2.) 12 h, reflux; Yield given. Multistep reaction. Further byproducts given. Yields of byproduct given;