Trifluoroacetic acid → N2-(1H-indazol-6-yl)-N4-(2,2,2-trifluoroethyl)furo[3,2-d]pyrimidine-2,4-diamine

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Reaction Conditions

Reaction Steps

N4-(2,2,2-trifluoroethyl)-N2-(1-((2-(trimethylsilyl)ethoxy)methyl)-1H-indazol-6-yl)furo[3,2-d]pyrimidine-2,4-diamine (1.08 g, 2.257 mmol) was dissolved in DCM (15 mL). TFA (10 mL, 130 mmol) was added. The resulting mixture was stirred at about 30° C. for about 6 h. The mixture was concentrated in vacuo. The residue was diluted with DCM (30 mL) and the pH was adjusted to about pH=9.0 with concentrated NH4OH. The solvents were removed under reduced pressure and the resulting mixture was purified by preparative-HPLC (Table 2, method w) to afford N2-(1H-indazol-6-yl)-N4-(2,2,2-trifluoroethyl)furo[3,2-d]pyrimidine-2,4-diamine (0.15 g, 19%): LC/MS (Table 2, Method h) Rt=1.79 min; MS m/z: 349 (M+H)+. Syk IC50=A

Provenance & Evidence