sulfuryl dichloride; 2,2'-azo-bisisobutyronitrile; titanium tetrachloride 1) 130 deg C, 70 min, 2) benzene, 20 - 25 deg C, 22h; Yield given. Multistep reaction;

iron(III) chloride 1.) 100 deg C - 110 deg C, 2.) 20 - 25 deg C, 16h or 100 - 110 deg C, 4.5h; Yield given. Multistep reaction. Further byproducts given. Yields of byproduct given. Title compound not separated from byproducts;

titanium tetrachloride T=20 - 25°C; 13 h; Product distribution;

iron(III) chloride T=100 - 110°C; 2.5 h; Product distribution;