Water → 3-[[5-cyano-3-fluoro-6-(5-fluoro-1H-pyrrolo[2,3-b]pyridin-3-yl)-2-pyridyl]amino]-4,4-dimethyl-hexanoic acid

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Reaction Conditions

Reaction Steps

Ethyl 3-[[5-cyano-3-fluoro-6-[5-fluoro-1-(p-tolylsulfonyl)pyrrolo[2,3-b]pyridin-3-yl]-2-pyridyl]amino]-4,4-dimethyl-hexanoate, 159a, (0.27 g, 0.45 mmol) was dissolved in THF (7 mL) and treated with LiOH (4.50 mL of 1 M, 4.50 mmol). The reaction mixture was heated to 70° C. for 10 hours. After cooling to room temperature, water (20 mL) and ethyl acetate (20 mL) were added and the layers were separated. The aqueous layer was brought to a neutral pH by addition of 1N HCl, and the resulting precipitate was collected by filtration, washed with water and concentrated in vacuo to provide 77 mg of the desired product: 1H NMR (400 MHz, DMSO-d6) δ 12.37 (s, 1H), 12.12 (s, 1H), 8.75 (d, J=9.9 Hz, 1H), 8.32 (s, 2H), 7.83 (d, J=11.4 Hz, 1H), 7.48 (d, J=9.5 Hz, 1H), 5.00 (t, J=9.1 Hz, 1H), 2.71-2.54 (m, 2H), 1.30 (d, J=7.4 Hz, 2H), 0.80 (t, J=18.7 Hz, 9H); LCMS Gradient 10-90%, 0.1% formic acid, 5 minutes, C18/ACN, Retention Time=3.14 minutes (M+H) 414.31.

Provenance & Evidence