acetic anhydride 0.25 h; Heating;

1: 93 percent / acetic anhydride / 0.25 h / Heating 2: 58 percent / phosphoryl chloride / 2 h / Heating View Scheme

1: 93 percent / acetic anhydride / 0.25 h / Heating 2: 58 percent / phosphoryl chloride / 2 h / Heating 3: 83 percent / thiourea / ethanol / 0.5 h / Heating View Scheme

1: 93 percent / acetic anhydride / 0.25 h / Heating 2: 58 percent / phosphoryl chloride / 2 h / Heating 3: 83 percent / thiourea / ethanol / 0.5 h / Heating 4: 74 percent / sodium hydroxide / H2O / 2 h / 20 - 25 °C View Scheme

in ethanol 0.5 h; Heating;