potassium carbonate in methanol T=50 - 55°C; 12 h;

1: 86 percent / CHCl3 / 20 h / Heating 2: 99.3 percent / EtONa / ethanol / 3 h / Heating 3: 79 percent / K2CO3 / methanol / 12 h / 50 - 55 °C View Scheme

1: 99.3 percent / EtONa / ethanol / 3 h / Heating 2: 79 percent / K2CO3 / methanol / 12 h / 50 - 55 °C View Scheme