1.1: sodium hydrogencarbonate; sodium hypochlorite; potassium bromide; 2,2,6,6-tetramethyl-1-piperidinyloxy, free radical / dichloromethane / 0 - 5 °C 2.1: acetic acid / methanol / 1 h / 20 °C 2.2: 25 - 45 °C 3.1: sodium hydroxide; water / methanol / 6 h / 20 °C 4.1: sodium hydroxide; dihydrogen peroxide / dimethyl sulfoxide / 6 h / 20 °C View Scheme