sodium hydroxide; bromine in ice-water; ethanol; acetic acid; ethyl acetate

oxygen; caesium carbonate; triethyl phosphite in dimethyl sulfoxide T=25°C; P=760.051 Torr; 24 h; Schlenk technique;

1: AlCl3, aluminium chloride / dichloromethane / 0 °C 2: water; sodium hydroxide; tetrabutylammomium bromide / 0 °C 3: caesium carbonate; triethyl phosphite; oxygen / dimethyl sulfoxide / 24 h / 25 °C / 760.05 Torr / |Schlenk technique View Scheme

in toluene T=20 - 125°C; 1 h; Product distribution / selectivity;