1: With copper(I) oxide; potassium carbonate T=180°C; Goldberg coupling reaction; 12 h; 2: With sodium hydroxide in ethylene glycol 1 h; Heatingsilicone bath at 220 deg C;

1: 84 percent / Cu2O; K2CO3 / 8 h / 180 °C 2: 75 percent / NaOH / ethane-1,2-diol / 1 h / Heating View Scheme