potassium carbonate in acetone Heating;

1: 73 percent / K2CO3 / acetone / 11 h / Heating 2: 32 percent / BF3 / 0.5 h / 60 °C 3: 15 percent / DBU, NaBr / dimethylformamide / 1 h / 150 °C 4: 78 percent / K2CO3 / acetone / Heating View Scheme

1: 15 percent / DBU, NaBr / dimethylformamide / 1 h / 150 °C 2: 78 percent / K2CO3 / acetone / Heating View Scheme

1: 32 percent / BF3 / 0.5 h / 60 °C 2: 15 percent / DBU, NaBr / dimethylformamide / 1 h / 150 °C 3: 78 percent / K2CO3 / acetone / Heating View Scheme

1: 41 percent / NaCl / dimethylsulfoxide / 1.5 h / 150 °C 2: 78 percent / K2CO3 / acetone / Heating View Scheme