Trifluoroacetic acid → ethyl [4-bromo-3-(4,5-difluoro-2-hydroxyphenyl)-2-oxo-2,3-dihydro-1H-indol-1-yl]acetate

HRID 425505ノート

反応式

HRID 425505 の反応式
[Br:1][C:2]1[CH:10]=[CH:9][CH:8]=[C:7]2[C:3]=1[C:4]([C:19]1[CH:24]=[C:23]([F:25])[C:22]([F:26])=[CH:21][C:20]=1[OH:27])(O)[C:5](=[O:17])[N:6]2[CH2:11][C:12]([O:14][CH2:15][CH3:16])=[O:13].C([SiH](CC)CC)C.FC(F)(F)C(O)=O>C(OCC)(=O)C>[Br:1][C:2]1[CH:10]=[CH:9][CH:8]=[C:7]2[C:3]=1[CH:4]([C:19]1[CH:24]=[C:23]([F:25])[C:22]([F:26])=[CH:21][C:20]=1[OH:27])[C:5](=[O:17])[N:6]2[CH2:11][C:12]([O:14][CH2:15][CH3:16])=[O:13]

参加物

5

反応物 3

HCID 6422Trifluoroacetic acidHCID 12052TriethylsilaneHCID 58872544ethyl [4-bromo-3-(4,5-difluoro-2-hydroxyphenyl)-3-hydroxy-2-oxo-2,3-dihydro-1H-indol-1-yl]acetate

生成物 1

HCID 58872550ethyl [4-bromo-3-(4,5-difluoro-2-hydroxyphenyl)-2-oxo-2,3-dihydro-1H-indol-1-yl]acetate収率 43.4%

試薬・触媒・溶媒 1

HCID 8857Ethyl Acetate溶媒

反応条件

温度
90 °C

実験手順

A mixture of ethyl [4-bromo-3-(4,5-difluoro-2-hydroxyphenyl)-3-hydroxy-2-oxo-2,3-dihydro-1H-indol-1-yl]acetate (0.90 g, 2.00 mmol), triethylsilane (2.00 mL, 12.2 mmol) and trifluroacetic acid (0.94 mL, 12.2 mmol) was heated at 90° C. for two days. After cooling down to ambient temperature, the mixture was diluted with ethyl acetate (200 mL), washed with water, dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated in vacuo to dryness. The residue was subjected to column chromatography (ethyl acetate/hexanes, 1/3) to give the title compound (0.37 g, 43%): 1H NMR (300 MHz, CDCl3) δ 7.35-7.22 (m, 3H), 6.82-6.71 (m, 2H), 6.52 (t, 1H), 5.10 (s, 1H), 4.45 (s, 2H), 4.21 (q, 2H), 1.23 (t, 3H); MS (ES+) m/z 426.4 (M+1), 428.4 (M+1).

後処理

  1. temperatureAfter cooling down to ambient temperature
  2. washwashed with water
  3. dry with materialdried over anhydrous sodium sulfate
  4. filtrationfiltered
  5. concentrationThe filtrate was concentrated in vacuo to dryness

出典と根拠

ORDレコード
ord-c84258cf60954b659d9f1413a347e0b6
出典データセット
uspto-grants-2012_01
特許番号
US08106087B2

反応ノート

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