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

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Reaction Steps

tert-Butyl 4-(4-((4-(2-(2-amino-2-oxoethyl)phenethyl)-5-(trifluoromethyl)pyrimidin-2-yl)amino)phenyl)piperazine-1-carboxylate (I8) (0.131 g, 0.224 mmol) was dissolved in DCM (7 mL) under an atmosphere of nitrogen. Trifluoroacetic acid (0.857 mL, 11.2 mmol) was added to the solution and the reaction was stirred at room temperature for 24 hours. Volatiles were removed in vacuo, EtOAc (70 mL) and 2 M aq. NaOH (70 mL) were added to the oil and the layers were separated. The aqueous layer was extracted with EtOAc (50 mL), the combined organics were washed with brine (50 mL), dried (Na2SO4), filtered and concentrated in vacuo. The resulting solid was taken up in DCM (˜5 mL) and methanol (˜1 mL) and concentrated in vacuo. The process was repeated with only DCM twice to give the title compound (1) (0.104 g, 96% yield) as a pale yellow solid; 1H NMR (400 MHz, d6-DMSO) δ 9.96 (s, 1H), 8.60 (s, 1H), 7.61-7.53 (m, 2H), 7.43 (br s, 1H), 7.25-7.13 (m, 4H), 6.98-6.86 (m, 3H), 3.50 (s, 2H), 3.12-3.05 (m, 2H), 3.04-2.94 (m, 6H), 2.86-2.78 (m, 4H). LCMS Method C: rt 4.774 min; m/z 485.2 [M+H]+.

Provenance & Evidence