2,2-dimethylpropionic acid 2-[(R)-3-(5-fluoro-2-{(S)-2-[9-(tetrahydropyran-2-yl)-9H-purin-6-ylamino]propionylamino}phenylamino)piperidin-1-yl]ethyl ester → HCID 178461945, compound

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Reaction Steps

A solution of 2,2-dimethylpropionic acid 2-[(R)-3-(5-fluoro-2-{(S)-2-[9-(tetrahydropyran-2-yl)-9H-purin-6-ylamino]propionylamino}phenylamino)piperidin-1-yl]ethyl ester (213 mg, 0.35 mmol), in aqueous 6M HCl (10 mL) was refluxed for 40 min. After cooling to RT, volatiles were removed under reduced pressure and the resulting residue was purified by column chromatography (C18, gradient 2-35% MeOH in 0.5% TFA/H2O) then loaded in dioxane/water (1:1) onto an Isolute® SCX-2 cartridge. The cartridge was washed with dioxane/water (1:1), then dioxane and the product eluted with 10% 880 NH3 in dioxane, then 2M NH3/MeOH. Further purification by column chromatography (Si—PCC, gradient 3-21% 2M NH3/MeOH in DCM) afforded 256 as a pale yellow solid (40 mg, 27%). LCMS (Method K): RT 1.94 min [M+H]+ 425.1. 1H NMR (CD3OD, 400 MHz): δ 8.30 (1H, s), 8.08 (1H, s), 7.59 (1H, dd, J=8.9, 5.0 Hz), 7.49 (1H, dd, J=9.5, 2.3 Hz), 7.01 (1H, dt, J=9.2, 2.4 Hz), 6.03 (1H, bs), 3.67 (2H, t, J=5.8 Hz), 3.13-3.09 (1H, m), 2.98-2.92 (2H, m), 2.69-2.55 (2H, m), 2.28-2.14 (2H, m), 1.93-1.88 (1H, m), 1.82 (3H, d, J=7.0 Hz), 1.77-1.74 (1H, m), 1.51-1.41 (1H, m)

Provenance & Evidence