potassium hydroxide in water; N,N-dimethyl-formamide 3 h; Heating;

1: 42 percent / ammonium peroxodisulfate / H2O / 1 h / Heating 2: 96 percent / phosphorus pentachloride, phosphorus oxychloride, diethylaniline / 2.5 h / Heating 3: 92 percent / potassium hydroxide / H2O; dimethylformamide / 3 h / Heating View Scheme

1: 90 percent / ethanol / 8 h / Heating 2: 96 percent / phosphorus pentachloride, phosphorus oxychloride, diethylaniline / 2.5 h / Heating 3: 92 percent / potassium hydroxide / H2O; dimethylformamide / 3 h / Heating View Scheme

1: 96 percent / phosphorus pentachloride, phosphorus oxychloride, diethylaniline / 2.5 h / Heating 2: 92 percent / potassium hydroxide / H2O; dimethylformamide / 3 h / Heating View Scheme