A slurry of 7-bromo-2-chloroquioxaline (0.82 mmol), a boronic acid such as 2-furan boronic acid (0.82 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) dichloromethane complex (1:1) (0.06 mmol), in 1,4-dioxane (4 ml) and 2M solution potassium carbonate (2 ml) was stirred at 100° C. for 3 hour. Then N-[5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3-pyridinyl]benzenesulfonamide (0.90 mmol) was added and the reaction mixture stirred at 100° C. for 18 hours. The reaction was cooled to ambient temperature, the organic layer separated and purified directly on silica by column chromatography (50% ethyl acetate/hexanes). The desired fractions were combined and concentrated to give the title compound (50 mg, 14%) as a tan solid. MS(ES)+ m/e 429.0 [M+H]+.
