C([O:3][C:4](=[O:21])[CH2:5][O:6][C:7]1[C:8]([Cl:20])=[N:9][C:10]([Cl:19])=[N:11][C:12]=1[N:13]1[CH2:18][CH2:17][O:16][CH2:15][CH2:14]1)C.[Li+].[OH-]>C1COCC1.O>[Cl:19][C:10]1[N:9]=[C:8]([Cl:20])[C:7]([O:6][CH2:5][C:4]([OH:21])=[O:3])=[C:12]([N:13]2[CH2:14][CH2:15][O:16][CH2:17][CH2:18]2)[N:11]=1To a solution of (2,4-dichloro-6-morpholin-4-yl-pyrimidin-5-yloxy)-acetic acid ethyl ester (581 mg, 1.73 mmol) in THF (10 mL) and water (2.5 mL) was added LiOH (951 μL, 1.90 mmol, 2M aqueous solution) and the resulting mixture stirred at RT for 2.5 hours. The reaction mixture was quenched with 1M HCl and extracted with ethyl acetate. The combined organic extracts were dried (Na2SO4) and concentrated in vacuo affording (2,4-Dichloro-6-morpholin-4-yl-pyrimidin-5-yloxy)-acetic acid as a white solid (515 mg, 97%). 1H NMR (400 MHz, CDCl3): δ 4.59 (2H, s), 3.93-3.87 (4H, m), 3.81-3.75 (4H, m).
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