Trifluoroacetic acid → (2S)-1-(4-Chlorophenyl)-4-(4-(isoquinolin-6-yl)-1H-pyrazol-1-yl)butan-2-amine

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A mixture of tert-butyl(S)-1-(4-chlorophenyl)-4-(4-(isoquinolin-6-yl)-1H-pyrazol-1-yl)butan-2-ylcarbamate (320 mg, 0.67 mmol) and TFA (5.00 mL, 64 mmol) in DCM (5 mL) was stirred at room temperature for 2 hours. After concentration by vacuum distillation, the residue was purified by reverse-phase HPLC (Phenomenex Synergi 4m Max RP 80 A column, 150×21 mm, 20 mL/min, 10-95% CH3CN/H2O, 0.1% TFA, 10.5 minute gradient) to give the product as an off-white solid (165 mg, 65%). HRMS (TOF) Calcd for C22H22ClN4+: 377.1535, found: 377.1531.

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