Water (1 mL) and 2 M aq. sodium carbonate solution (0.39 mL, 0.78 mmol) were added at room temperature to a degassed solution of 3-(4-bromophenyl)-1-(pyridazin-4-yl)-3-o-tolylpropan-1-one (100 mg, 262 μmol), 4-boronobenzoic acid (53.8 mg, 315 μmol) and 1,1′-bis(diphenylphosphino)ferrocene-palladium(II) dichloride dichloromethane complex (11 mg, 13 μmol) in 1,4-dioxane (1.5 mL). After heating at 80° C. for 4 h the reaction mixture was partitioned between ethyl acetate and sat. aq. ammonium chloride solution. The organic layer was washed with brine, dried over magnesium sulfate, filtered, and evaporated. After chromatography (SiO2; gradient heptane/ethyl acetate 1:1 to ethyl acetate) the title compound was obtained (33 mg, 30%). Light yellow solid, MS: 423.2 [M+H]+.
