Lithium hydroxide, monohydrate → 2-(2-(2-(2-((4-(4-(tert-Butoxycarbonyl)morpholin-2-yl)phenyl)amino)-5-(trifluoromethyl)pyrimidin-4-yl)ethyl)phenyl)acetic acid

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tert-Butyl 2-(4-((4-(2-(2-methoxy-2-oxoethyl)phenethyl)-5-(trifluoromethyl)pyrimidin-2-yl)amino)phenyl)morpholine-4-carboxylate (I89) (46 mg, 0.077 mmol) was dissolved in THF (2 mL), and lithium hydroxide hydrate (6.0 mg, 0.15 mmol) in water (0.5 mL) was added. After 18 hours the mixture was concentrated, diluted with water (5 mL) and the pH adjusted to 3 with 6 M HCl. The mixture was extracted with ethyl acetate (3×10 mL), and the combined organic extracts washed with brine (20 mL), dried over sodium sulfate and evaporated to give the title compound (I90) (39 mg, 85% yield) as a pale yellow syrup; 1H NMR (400 MHz, CDCl3) δ 8.52 (s, 1H), 7.54 (d, J=8.4 Hz, 2H), 7.35-7.27 (m, 4H), 4.38 (d, J=10.1 Hz, 1H), 4.07-3.80 (m, 5H), 3.67 (td, J=11.7, 2.7 Hz, 1H), 3.06 (s, 4H), 2.84 (s, 2H), 1.47 (s, 9H). LCMS Method C: rt 6.49 min; m/z 587.1 [M+H]+, 531.0 [M−tBu+2H]+, 487.1 [M-Boc+2H]+; m/z 585.2 [M−H]+.

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