sodium hydroxide in methanol; water T=50°C; 0.666667 h;

1: bromine 2: 90 percent / sodium hydroxide / methanol; H2O / 0.67 h / 50 °C View Scheme

sodium hydroxide; oxygen; toluene-4-sulfonic acid 1.) methanol, water 50 deg C, 16 h, 2.) chloroform, reflux; Yield given. Multistep reaction. Yields of byproduct given;