1: Et3N / CH2Cl2 2: NaI / acetone / 1.) r.t., 10 h, 2.) reflux, 45 min 3: n-Bu3SnH, AIBN / benzene / 1 h / 80 °C View Scheme

in toluene T=0°C; 0.5 h; Yield given. Yields of byproduct given. Title compound not separated from byproducts;