potassium carbonate in ethanol T=70°C; 2.5 h;

1: oxalyl chloride / 1,2-dichloro-ethane / 0.25 h / 20 °C 2: AlCl3 / 1,2-dichloro-ethane / 3 h 3: K2CO3 / ethanol / 2 h / 70 °C View Scheme

1.1: (COCl)2 / 1,2-dichloro-ethane / 0 °C 1.2: AlCl3 / 1,2-dichloro-ethane / 20 °C 1.3: 50percent aq. NaOH / 1,2-dichloro-ethane / 20 °C 2.1: K2CO3 / ethanol / 80 °C View Scheme