potassium carbonate in N,N-dimethyl-formamide 1) 60 deg C, 15 min; 2) stirring 1 h;;

1: 78 percent / 0.13 h / 130 °C 2: 85 percent / various solvent(s) / 0.2 h / Heating; heating in Dowtherm 3: 65 percent / 1) potassium carbonate / dimethylformamide / 1) 60 deg C, 15 min; 2) stirring 1 h; View Scheme

1: 85 percent / various solvent(s) / 0.2 h / Heating; heating in Dowtherm 2: 65 percent / 1) potassium carbonate / dimethylformamide / 1) 60 deg C, 15 min; 2) stirring 1 h; View Scheme

1: 78 percent / 0.13 h / 130 °C 2: 85 percent / various solvent(s) / 0.2 h / Heating; heating in Dowtherm 3: 65 percent / 1) potassium carbonate / dimethylformamide / 1) 60 deg C, 15 min; 2) stirring 1 h; View Scheme

potassium hydroxide 1 h; Heating;