4-Ethylamino-2-phenylamino-pyrimidine-5-carboxylic acid ethyl ester → (4-Ethylamino-2-phenylamino-pyrimidin-5-yl)methanol
Reaktionsgleichung
C([O:3][C:4]([C:6]1[C:7]([NH:19][CH2:20][CH3:21])=[N:8][C:9]([NH:12][C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=2)=[N:10][CH:11]=1)=O)C.[H-].[Al+3].[Li+].[H-].[H-].[H-]>O1CCCC1>[CH2:20]([NH:19][C:7]1[C:6]([CH2:4][OH:3])=[CH:11][N:10]=[C:9]([NH:12][C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=2)[N:8]=1)[CH3:21]Komponenten
4
Versuchsvorschrift
A solution of 4-ethylamino-2-phenylamino-pyrimidine-5-carboxylic acid ethyl ester (109 mg, 0.38 mmol) in 6 mL of tetrahydrofuran was added dropwise to a room temperature suspension of lithium aluminum hydride (35 mg, 0.92 mmol) in 5 mL of tetrahydrofuran. After 25 minutes, an additional 30 mg of lithium aluminum hydride was added, and stirring was continued for 30 minutes. The reaction was carefully quenched with 120 μL of water, 200 μL of 15% NaOH, and 300 μL of water. After stirring for 1 hour, the white precipitate was removed by filtration washing with ethyl acetate. The filtrate was concentrated in vacuo, and the crude material was purified by flash chromatography eluting with ethyl acetate to provide 36 mg (39%) of (4-ethylamino-2-phenylamino-pyrimidin-5-yl)methanol; mp 174°-176° C.