N-bromosuccinmide; 2,2'-azo-bisisobutyronitrile; iodine; lithium carbonate; LiF Yield given. Multistep reaction. Yields of byproduct given;

1: 1.) Hg(OAc)2; 2.) 20percent aq. NaOH / 1.) glacial AcOH, reflux, 20-24 h; 2.) MeOH, reflux, 10 min. 2: polyphosphoric acid / xylene / 1 h / 95 - 100 °C View Scheme

N-bromosuccinmide; 2,2'-azo-bisisobutyronitrile; lithium carbonate; LiF 1.) CCl4, reflux, 3 h; 2.) HMPA, 100 deg C, 3 h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;