bromine in acetic acid

1: 70 percent / potassium hydroxide, picric acid / 225 °C / 15 Torr 2: 67 percent / Bromine / acetic acid View Scheme

potassium tert-butylate; sodium ethanolate 1.) reflux, 1 h, dimethyl sulfoxide, ethanol, 2.) 80 deg C, 30 min, tert-butyl alcohol; Yield given. Multistep reaction;