1: 80 percent / aq. K2CO3 / methanol / 0.25 h / Ambient temperature 2: 60 percent / NaH / dimethylformamide / 0.25 h / -20 °C 3: 50 percent / POCl3 / 1,2-dichloro-ethane / Heating View Scheme

potassium carbonate in methanol 0.25 h; Ambient temperature;