in ethylene glycol dimethyl ether T=120 - 140°C; 8 h; Heating;

1: 94 percent / phosphorus pentachloride, phosphorus oxychloride / 3.5 h / Heating 2: 71 percent / 1,2-dimethoxy-ethane / 8 h / 120 - 140 °C / Heating View Scheme

1: acetic anhydride / toluene / 1.5 h / Heating 2: ammonium acetate / 9 h / 190 - 200 °C 3: 94 percent / phosphorus pentachloride, phosphorus oxychloride / 3.5 h / Heating 4: 71 percent / 1,2-dimethoxy-ethane / 8 h / 120 - 140 °C / Heating View Scheme

1: ammonium acetate / 9 h / 190 - 200 °C 2: 94 percent / phosphorus pentachloride, phosphorus oxychloride / 3.5 h / Heating 3: 71 percent / 1,2-dimethoxy-ethane / 8 h / 120 - 140 °C / Heating View Scheme