acetic anhydride 14 h; Heating;

1: 57 percent / benzyltrimethylammonium hydroxide / methanol; 2-methyl-propan-2-ol / 10 - 20 °C 2: 74 percent / sodium hydroxide, water / 10 h / Heating 3: 52 percent / acetic anhydride / 14 h / Heating View Scheme

1: 74 percent / sodium hydroxide, water / 10 h / Heating 2: 52 percent / acetic anhydride / 14 h / Heating View Scheme

potassium hydroxide; water T=70°C; 6 h; Heating;