Sodium Carbonate → 4-[1-(1-benzenesulfonyl-5-fluoro-1H-pyrrolo[2,3-b]pyridin-2-yl)-2-cyclopentyl-vinyl]-N-tert-butyl-benzamide

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Reaction Steps

To a mixture of toluene-4-sulfonic acid-1-(1-benzenesulfonyl-5-fluoro-1H-pyrrolo[2,3-b]pyridin-2-yl)-2-cyclopentyl-vinyl ester (1.5 g, 2.78 mmol), [4-(tert-butylaminocarbonyl)phenyl]boronic acid (1.3 g, 5.56 mmol) and dichlorobis(triphenylphosphine)palladium (II) (195 mg, 0.28 mmol) in dioxane (8 mL) was added an aqueous sodium carbonate solution (2 M, 3.5 mL, 7 mmol). The resulting mixture was subjected to microwave irradiation for 2 h at 100° C. The mixture was diluted with ethyl acetate (250 mL), washed with a saturated aqueous sodium bicarbonate solution (2×50 mL), brine, dried over anhydrous sodium sulfate and concentrated in vacuo. Purification by flash silica gel chromatography (silica gel from QingDao, 200-300 mesh, glass column from Shanghai SD company, 20% ethyl acetate/hexanes) afforded 4-[1-(1-benzenesulfonyl-5-fluoro-1H-pyrrolo[2,3-b]pyridin-2-yl)-2-cyclopentyl-vinyl]-N-tert-butyl-benzamide (1.2 g, 79.5%) as a light yellow solid: LC/MS m/e calcd for C31H32FN3O3S [M+H]+ 546.69, observed 546.1.

Provenance & Evidence