1: 65 percent / CH3ONa / Ambient temperature 2: 82 percent / CHCl3 / Ambient temperature 3: 86 percent / BF3*Et2O / CHCl3 / 0.5 h / Heating 4: 62 percent / 10percent methanolic KOH / 0.5 h / 65 °C View Scheme

sodium acetate; acetic anhydride T=100°C; 2 h;

in toluene 48 h; Heating;

sodium hydroxide in methanol Ambient temperature;

sodium methylate Ambient temperature;