Sodium Carbonate → 6-(N-(3-Chloro-4-vinylphenyl)methylsulfonamido)-5-cyclopropyl-2-(4-fluorophenyl)-N-methylbenzofuran-3-carboxamide

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Reaction Steps

A mixture of 6-(N-(4-bromo-3-chlorophenyl)methylsulfonamido)-5-cyclopropyl-2-(4-fluorophenyl)-N-methylbenzofuran-3-carboxamide (1.00 g, 1.69 mmol), PdCl2(dppf)-CH2Cl2 adduct (138 mg, 0.169 mmol), sodium carbonate (537 mg, 5.07 mmol) and vinylboronic acid pinacol ester (0.573 mL, 3.38 mmol) in a 9:1 mixture of 1,4-dioxane and water (20 mL) was degassed and heated at 80° for 16 h. The mixture was cooled to rt, then poured into water and extracted with EtOAc (3×). The combined organic layers were washed with brine (1×), dried over sodium sulfate and concentrated under reduced pressure. The light brown oily residue was purified by flash chromatography (silica gel, gradient of 0 to 50% EtOAc in hexanes) to afford the title compound (821 mg, 90%) as a white solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 8.46 (q, 1H), 8.08-8.14 (m, 1H), 7.92-8.02 (m, 2H), 7.70-7.76 (m, 1H), 7.34-7.47 (m, 4H), 7.17-7.24 (m, 1H), 6.96 (dd, 1H), 5.87 (d, 1H), 5.44 (d, 1H), 3.39-3.47 (m, 3H), 2.83 (d, 3H), 2.04-2.16 (m, 1H), 0.73-1.03 (m, 3H), 0.36-0.55 (m, 1H). LCMS (m/z, ES+)=539 (M+H+).

Provenance & Evidence