1: 70 percent / CuI / diethyl ether / 1 h / -30 °C 2: 75 percent / sodium hydroxide / methanol / 4 h / 20 °C 3: 65 percent / Pb(OAc)4; I2 / CCl4 / 1 h / 80 °C / Irradiation View Scheme

1: 70 percent / CuI / diethyl ether / 1 h / -30 °C 2: 75 percent / sodium hydroxide / methanol / 4 h / 20 °C View Scheme

1: 70 percent / CuI / diethyl ether / 1 h / -30 °C 2: 75 percent / sodium hydroxide / methanol / 4 h / 20 °C 3: 65 percent / Pb(OAc)4; I2 / CCl4 / 1 h / 80 °C / Irradiation 4: 70 percent / dimethylformamide / 3 h / 110 °C View Scheme

1: 70 percent / CuI / diethyl ether / 1 h / -30 °C 2: 75 percent / sodium hydroxide / methanol / 4 h / 20 °C 3: 65 percent / Pb(OAc)4; I2 / CCl4 / 1 h / 80 °C / Irradiation 4: 70 percent / dimethylformamide / 3 h / 110 °C 5: 80 percent / potassium carbonate / methanol / 5 h / 20 °C View Scheme