1: 81 percent / 0.1 M aq. HCl / ethanol / 0.5 h / Heating 2: Et3N / CH2Cl2 3: NaI / acetone / 1.) r.t., 10 h, 2.) reflux, 45 min 4: n-Bu3SnH, AIBN / benzene / 1 h / 80 °C View Scheme