A mixture of 4-bromo-3-chloro-5-(trifluoromethyl)aniline (573 mg, 2.09 mmol, Eq: 1.00), 3-(methylsulfonamido)phenylboronic acid (529 mg, 2.46 mmol, Eq: 1.18) and tetrakis(triphenylphosphine)palladium (0) (211 mg, 183 μmol, Eq: 0.0875) was degassed (vacuum/nitrogen cycles) then degassed dioxane (6.87 ml) (nitrogen bubbling with sonication) and a degassed (nitrogen bubbling with sonication) 2M solution of sodium carbonate in water (1.83 ml, 3.66 mmol, Eq: 1.75) were added. The mixture was stirred at 100° C. for 18 h. The reaction mixture was adsorbed unto silica (2 g), concentrated and purified on silica gel (silica 40 g, dichloromethane/ethyl acetate 100:0 to 80:20) to give 574 mg (75%) of the desired product as a yellow solid.
