Cu2Cl2 in 1,4-dioxane T=60 - 70°C; 0.0833333 h;

1: 92 percent / 1.) NaH / tetrahydrofuran / 1.) reflux, 1 h, 2.) room temperature, 1 h 2: 88 percent / Cu2Cl2 / dioxane / 0.08 h / 60 - 70 °C View Scheme