1: 94 percent / Et3N, CuI / (Ph3P)2PdCl2 / tetrahydrofuran / Ambient temperature 2: 89 percent / PCC / CH2Cl2 / 8 h 3: 84 percent / diethyl ether / 0.5 h / Ambient temperature 4: 97 percent / K2CO3 / methanol / 0.5 h / Ambient temperature 5: 90 percent / PCC / CH2Cl2 / 2 h 6: 79 percent / 1,4-cyclohexadiene / chlorobenzene / 8 h / 190 °C View Scheme

1: 94 percent / Et3N, CuI / (Ph3P)2PdCl2 / tetrahydrofuran / Ambient temperature 2: 89 percent / PCC / CH2Cl2 / 8 h 3: 84 percent / diethyl ether / 0.5 h / Ambient temperature 4: 97 percent / K2CO3 / methanol / 0.5 h / Ambient temperature 5: 90 percent / PCC / CH2Cl2 / 2 h 6: 5 percent / 1,4-cyclohexadiene / chlorobenzene / 8 h / 190 °C View Scheme