potassium hydroxide in ethanol Heating;

1: 75 percent / dichloromaleic anhydride / 200 °C 2: 77 percent / AlI3 / CS2 / Heating 3: 96 percent / 2 M KOH / ethanol / Heating View Scheme

1: 58 percent / 1.5 h / 260 - 263 °C / 0.02 Torr 2: 75 percent / dichloromaleic anhydride / 200 °C 3: 77 percent / AlI3 / CS2 / Heating 4: 96 percent / 2 M KOH / ethanol / Heating View Scheme

1: 82 percent / Et3N / toluene / 1.5 h / Ambient temperature 2: 58 percent / 1.5 h / 260 - 263 °C / 0.02 Torr 3: 75 percent / dichloromaleic anhydride / 200 °C 4: 77 percent / AlI3 / CS2 / Heating 5: 96 percent / 2 M KOH / ethanol / Heating View Scheme

1: 77 percent / AlI3 / CS2 / Heating 2: 96 percent / 2 M KOH / ethanol / Heating View Scheme