反应详情

A solution of 1-{6-[2-(2,4-dichloro-phenyl)-ethylamino]-2-methoxy-pyrimidin-4-yl}-piperidine-4-carboxylic acid methyl ester [70 mg, 0.16 mmol] and a 2 M solution of lithium hydroxide (1 mL, 2 mmol) in MeOH (1 mL) and THF (1 mL) is stirred at ambient temperature for 15 hours. The mixture is concentrated, and the residue is taken up with water, acidified to pH 2 with the addition of 10% HCl and extracted twice with EtOAc (20 mL). The organic extracts from the acidic layer are combined and dried over magnesium sulfate, filtered and concentrated to afford 1-{6-[2-(2,4-dichloro-phenyl)-ethylamino]-2-methoxy-pyrimidin-4-yl}-piperidine-4-carboxylic acid [26 mg, 38%, Example 97] as a solid. LCMS RT=2.02 minutes, MS: 425 (M+H). IC50=7 nM

1. concentrationThe mixture is concentrated
2. additionacidified to pH 2 with the addition of 10% HCl
3. extractionextracted twice with EtOAc (20 mL)
4. dry with materialdried over magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated