Resin bound 6-(3-hydroxyphenyl)-4-(1H-indazol-5-ylamino)-2-pyrazolylpyrimidine-5-carboxylic acid (100 mg, 0.055 mmol, 1 eq) was suspended in NMP, and morpholine (144 μL, 144 mg, 1.65 mmol, 30 eq) was added, followed by acetic acid (31 μL, 33 mg, 0.55 mmol, 10 eq). The reaction mixture was shaken at 90° C. overnight. The resin was filtered and washed with DMF, water, MeOH, CH2Cl2, then dried. The resin was treated with 95% TFA/H2O for 1.5 h at room temperature. Filtration and evaporation under reduced pressure afforded 6-(3-hydroxyphenyl)-4-(1H-indazol-5-ylamino)-2-morpholin-4-ylpyrimidine-5-carboxylic acid.
