1: 66 percent / 1) P(C6H5)3Br2 / CH2Cl2 / 4 h / 0 °C 2: 58 percent / AIBN, (n-Bu)3SnH / benzene / 10 h / Heating 3: 76 percent / Na-amalgam, K2HPO4 / methanol / 1) 0 deg to r.t., 2) r.t., 1 h 4: (C2H5)3N / tetrahydrofuran / 12 h / Ambient temperature View Scheme