Trifluoroacetic acid → 2-(2-(2-(2-((4-(Piperazin-1-ylmethyl)phenyl)amino)-5-(trifluoromethyl)pyrimidin-4-yl)ethyl)phenyl)acetamide

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tert-Butyl 4-(4-((4-(2-(2-amino-2-oxoethyl)phenethyl)-5-(trifluoromethyl)pyrimidin-2-yl)amino)benzyl)piperazine-1-carboxylate (I98) (34 mg, 0.057 mmol) was dissolved in DCM (4 mL) and TFA (0.4 mL) was added. The resulting mixture was stirred for 16 hours at room temperature then concentrated under reduced pressure. The residue was suspended in 10% aqueous NaOH (2 mL) and brine (3 mL) then extracted with ethyl acetate (4×5 mL). The combined organic phases were washed with brine, dried (sodium sulphate) and evaporated to dryness. The residue was triturated with diethyl ether to give the title compound (25) (27.5 mg, 98%) as a yellow solid; 1H NMR (400 MHz, d6-DMSO) δ 10.17 (s, 1H), 8.66 (s, 1H), 7.72-7.66 (m, 2H), 7.26-7.20 (m, 3H), 7.20-7.13 (m, 3H), 6.90 (s, 1H), 3.49 (s, 2H), 3.37 (s, 2H), 3.14-2.98 (m, 4H), 2.67 (t, J=4.7 Hz, 4H), 2.26 (s, 4H). LCMS Method C: rt 4.52 min; m/z 499.1 [M+H]+; m/z 497.1 [M−H]−.

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