Trifluoroacetic acid → HCID 67443185、化合物
反応式
[CH2:1]([O:3][C:4]([C:6]1[CH:7]=[C:8]2[C:13](=[CH:14][CH:15]=1)[NH:12][CH:11]([C:16]1[CH:21]=[C:20]([Br:22])[CH:19]=[CH:18][C:17]=1[F:23])[C:10]([CH3:25])([CH3:24])[CH:9]2O)=[O:5])[CH3:2].C([SiH](CC)CC)C.FC(F)(F)C(O)=O>>[CH2:1]([O:3][C:4]([C:6]1[CH:7]=[C:8]2[C:13](=[CH:14][CH:15]=1)[NH:12][CH:11]([C:16]1[CH:21]=[C:20]([Br:22])[CH:19]=[CH:18][C:17]=1[F:23])[C:10]([CH3:24])([CH3:25])[CH2:9]2)=[O:5])[CH3:2]参加物
4
反応条件
- 温度
- 25 °C
実験手順
To a mixture of 2-(5-bromo-2-fluoro-phenyl)-4-hydroxy-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester (3.33 g, 7.9 mmol) and triethylsilane (5 mL) at 25° C. was added trifluoroacetic acid (1 mL) dropwise. The resulting mixture was stirred at 25° C. for 1 h. Then the reaction mixture was concentrated in vacuo and the residue was extracted with ethyl acetate (2×20 mL), washed with saturated aqueous sodium bicarbonate solution (2×10 mL), dried over anhydrous sodium sulfate and concentrated in vacuo. Purification on flash silica gel chromatography (silica gel from QingDao, 200-300 mesh, glass column from Shanghai SD company)(10% ethyl acetate/hexanes) to afford 2-(5-bromo-2-fluoro-phenyl)-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester (0.76 g, 24%) as a white solid: LC/MS m/e calcd for C20H21BrFNO2 M+: 406.3, observed: 406.3, 408.2.