Water → (3~{r})-3-[[5-Fluoranyl-2-(5-Fluoranyl-1~{h}-Pyrrolo[2,3-B]pyridin-3-Yl)pyrimidin-4-Yl]amino]-4,4-Dimethyl-Pentanoic Acid

Participants

Reaction Conditions

Reaction Steps

(R)-Methyl 3-((5-fluoro-2-(5-fluoro-1H-pyrrolo[2,3-b]pyridin-3-yl)pyrimidin-4-yl)amino)-4,4-dimethylpentanoate, 9a, (18.4 g, 47.1 mmol) was dissolved in tetrahydrofuran (275 mL) and aqueous 1M LiOH (141 mL) was added. The mixture was heated to 50° C. for 3.5 h. The reaction mixture was cooled to room temperature and 180 mL of water was added. The tetrahydrofuran was removed under reduced pressure and the residue was then flushed twice with hexanes. Diethylether (60 mL) was added and the layers separated. The pH of the aqueous layer was adjusted to 6 with 1N HCl. Ethyl acetate (540 mL) was added, the layers were separated and the aqueous layer was extracted with ethyl acetate (720 mL), then again with ethyl acetate (300 mL). The organic layers were combined, washed with brine (100 mL) and dried (Na2SO4). The solvents were removed while flushing with heptanes to provide the desired product, 2, (17.5 g): 1H NMR (400 MHz, DMSO-d6) δ 12.23 (s, 1H), 12.03 (s, 1H), 8.68-8.52 (m, 1H), 8.27 (s, 1H), 8.19 (d, J=2.5 Hz, 1H), 8.13 (d, J=4.0 Hz, 1H), 7.39 (d, J=9.2 Hz, 1H), 4.83 (t, J=9.3 Hz, 1H), 2.71-2.51 (m, 2H), 0.97 (s, 9H); LCMS Gradient 10-90%, 0.1% formic acid, 5 min, C18/ACN, RT=1.96 minutes (M+H) 377.02.

Provenance & Evidence