Cesium carbonate → 4-[2-(2,4-difluorophenoxy)-5-(methylsulfonyl)phenyl]-6-methyl-1,6-dihydro-7H-pyrrolo[2,3-c]pyridin-7-one

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Reaction Steps

A mixture of Example 138a (0.05 g, 0.105 mmol), 2,4-difluorophenol (0.016 g, 0.126 mmol), and cesium carbonate (0.069 g, 0.211 mmol) in DMSO (1 mL) was heated at 120° C. for 16 hours. The reaction mixture was partitioned between water and ethyl acetate. The aqueous layer was extracted with additional ethyl acetate three times. The combined organic layers were washed with saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate, filtered, and concentrated. The residue was purified by reverse phase Preparative HPLC (10-80% acetonitrile in 0.1% TFA/water) to give the title compound (0.036 g, 0.084 mmol, 79% yield). 1H NMR (500 MHz, DMSO-d6) δ ppm 12.10 (s, 1H), 7.99 (d, J=2.44 Hz, 1H), 7.86 (dd, J=8.54, 2.44 Hz, 1H), 7.40-7.56 (m, 3H), 7.31 (t, J=2.9 Hz, 1H), 7.14-7.20 (m, 1H), 6.98 (d, J=8.54 Hz, 1H), 6.28-6.30 (m, 1H), 3.59 (s, 3H), 3.26 (s, 3H). MS (ESI+) m/z 431.1 (M+H)+.

Provenance & Evidence