1: 78 percent / K2CO3 / acetone / 5 h / Heating 2: K2CO3 / acetone / 72 h / Heating View Scheme

1: 76 percent / AlCl3 / CH2Cl2 / 16 h / Ambient temperature 2: 78 percent / K2CO3 / acetone / 5 h / Heating 3: K2CO3 / acetone / 72 h / Heating View Scheme

1: 72 percent / triethylamine / CH2Cl2 / 1 h / Ambient temperature 2: 76 percent / AlCl3 / CH2Cl2 / 16 h / Ambient temperature 3: 78 percent / K2CO3 / acetone / 5 h / Heating 4: K2CO3 / acetone / 72 h / Heating View Scheme

potassium carbonate in acetone 72 h; Heating;