C([O:3][C:4](=O)[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.CC(C[AlH]CC(C)C)C>C1COCC1>[Cl:19][C:10]1[N:9]=[C:8]([Cl:20])[C:7]([O:6][CH2:5][CH2:4][OH: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 (188 mg, 0.56 mmol) in THF (2.5 mL) at −78° C. was added DIBAL-H (2.0 mL, 2.0 mmol, 1M solution in THF) and the resulting mixture warmed to 0° C. over 30 minutes. The reaction mixture was quenched with methanol and Rochelle's salt (1M aqueous solution) and the aqueous extracted with ethyl acetate. The combined organic extracts were dried (Na2SO4) and concentrated in vacuo affording 2-(2,4-Dichloro-6-morpholin-4-yl-pyrimidin-5-yloxy)-ethanol as an oil (156 mg, 95%). LCMS: RT=2.60 min, [M+H]+=294/296/298.
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