Phenol → ethyl 3-(6-methyl-7-oxo-6,7-dihydro-1H-pyrrolo[2,3-c]pyridin-4-yl)-4-phenoxybenzoate

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Reaction Steps

A mixture of Example 9a (1.43 g, 3.05 mmol), phenol (0.0344 g, 3.66 mmol) and cesium carbonate (0.995, 3.05 mmol), in DMSO (15 mL) was heated at 110° C. for 12 hours. After cooling to room temperature, the reaction mixture was partitioned between water and ethyl acetate. The aqueous layer was extracted with additional ethyl acetate twice. The combined organic layers were washed with brine, dried over MgSO4, filtered, and concentrated. The residue was purified by flash chromatography (silica gel, 30-80% ethyl acetate/hexane) to afford 0.85 g (72%) of the title compound. 1H NMR (500 MHz, DMSO-d6) δ 1.31 (t, J=7.02 Hz, 3H), 3.55 (s, 3H), 4.32 (q, J=7.22 Hz, 2H), 6.23 (t, J=2.29 Hz, 1H), 6.97 (d, J=8.54 Hz, 1H), 7.06 (d, J=8.24 Hz, 2H), 7.17 (t, J=7.32 Hz, 1H), 7.28 (t, J=2.75 Hz, 1H), 7.36-7.51 (m, 3H), 7.94 (dd, J=8.7, 2.29 Hz, 1H), 8.04 (d, J=2.14 Hz, 1H), 12.02 (s, 1H). MS (ESI+) m/z 389.2 (M+H)+.

Provenance & Evidence