1.1: 89 percent / TiCl4 / CH2Cl2 / 2 h / -78 °C 2.1: triethylamine; DMAP / CH2Cl2 / 1.5 h / 0 - 20 °C 2.2: 90 percent / DBU / toluene / 1 h / 110 °C 3.1: 70 percent / CuI / diethyl ether / 1 h / -30 °C 4.1: 75 percent / sodium hydroxide / methanol / 4 h / 20 °C 5.1: 65 percent / Pb(OAc)4; I2 / CCl4 / 1 h / 80 °C / Irradiation View Scheme

1.1: 89 percent / TiCl4 / CH2Cl2 / 2 h / -78 °C 2.1: triethylamine; DMAP / CH2Cl2 / 1.5 h / 0 - 20 °C 2.2: 90 percent / DBU / toluene / 1 h / 110 °C 3.1: 70 percent / CuI / diethyl ether / 1 h / -30 °C 4.1: 75 percent / sodium hydroxide / methanol / 4 h / 20 °C View Scheme

1.1: 89 percent / TiCl4 / CH2Cl2 / 2 h / -78 °C 2.1: triethylamine; DMAP / CH2Cl2 / 1.5 h / 0 - 20 °C 2.2: 90 percent / DBU / toluene / 1 h / 110 °C 3.1: 70 percent / CuI / diethyl ether / 1 h / -30 °C 4.1: 75 percent / sodium hydroxide / methanol / 4 h / 20 °C 5.1: 65 percent / Pb(OAc)4; I2 / CCl4 / 1 h / 80 °C / Irradiation 6.1: 70 percent / dimethylformamide / 3 h / 110 °C View Scheme

1.1: 89 percent / TiCl4 / CH2Cl2 / 2 h / -78 °C 2.1: triethylamine; DMAP / CH2Cl2 / 1.5 h / 0 - 20 °C 2.2: 90 percent / DBU / toluene / 1 h / 110 °C 3.1: 70 percent / CuI / diethyl ether / 1 h / -30 °C 4.1: 75 percent / sodium hydroxide / methanol / 4 h / 20 °C 5.1: 65 percent / Pb(OAc)4; I2 / CCl4 / 1 h / 80 °C / Irradiation 6.1: 70 percent / dimethylformamide / 3 h / 110 °C 7.1: 80 percent / potassium carbonate / methanol / 5 h / 20 °C View Scheme