sodium methylate T=78°C; 18 h;

in methanol 24 h; Heating;

1: 98 percent / dicyclohexylcarbodiimide; dimethylaminopyridine / acetonitrile / 24 h / 20 °C 2: 94 percent / 0.17 h / 120 °C / microwave irradiation 3: 86 percent / sodium methoxide / 18 h / 78 °C View Scheme