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A solution of ethyl 4-({4-[({6-[cyclohexyl(cyclopropylmethyl)amino]pyrimidin-4-yl}carbonyl)amino]phenyl}sulfonyl)butanoate (Example 131, 80 mg; 0.16 mmol) in THF (5 ml) was treated with 10% sodium hydroxide solution (20 ml). After stirring for 45 minutes the mixture was cooled to 0° C. and acidified with concentrated HCl. The mixture was extracted with EtOAc and the combined organic extracts washed with water, passed through a hydrophobic frit and the solvent removed in vacuo. The residue was purified by column chromatography (silica) eluting with DCM containing increasing amounts of methanol to give the title compound as a white solid (65 mg, 81%).

1. extractionThe mixture was extracted with EtOAc
2. washthe combined organic extracts washed with water
3. customthe solvent removed in vacuo
4. customThe residue was purified by column chromatography (silica)
5. washeluting with DCM containing
6. temperatureincreasing amounts of methanol