Trifluoroacetic acid → 3-(4-(7-(1H-pyrazol-4-yl)imidazo[1,2-c]pyrimidin-5-yl)-1H-pyrazol-1-yl)-3-cyclopropylpropanenitrile

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To a solution of 3-cyclopropyl-3-(4-(7-(1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrazol-4-yl)imidazo[1,2-c]pyrimidin-5-yl)-1H-pyrazol-1-yl)propanenitrile (Example 32, 65.0 mg, 0.137 mmol) in DCM (2 mL) was added trifluoroacetic acid (2 mL) and the mixture was stirred at ambient temperature for 1.5 hours. The mixture was concentrated and the residue was partitioned into EtOAc (3 mL) and saturated NaHCO3 (3 mL). The biphasic mixture was stirred for 15 minutes and NaCl was added until saturated. The EtOAc layer was removed and the remaining aqueous portion was extracted with EtOAc. The combined EtOAc extracts were dried over MgSO4, filtered through a Celite plug and concentrated. The residual solid was dissolved in 10% MeOH/EtOAc and eluted through a SiO2 column using 10% MeOH/EtOAc for elution. The solution was concentrated to give the title compound (46 mg, 98% yield) as a white solid. MS (apci) m/z=345.2 (M+H).

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