sodium hydroxide

1: 83 percent / NaH / dimethylsulfoxide 2: 98 percent / N-bromosuccinimide, benzoyl peroxide / CCl4 / 5 h / Heating 3: 94 percent / ethanol; CCl4; H2O / 6 h 4: 96 percent / NaOH View Scheme

1: 94 percent / ethanol; CCl4; H2O / 6 h 2: 96 percent / NaOH View Scheme