p-Toluenesulfonic acid → 1-(4-Bromo-3-fluorophenyl)-2,2-diethoxyethanone

HRID 500117ノート

反応式

HRID 500117 の反応式
[Br:1][C:2]1[CH:7]=[CH:6][C:5]([C:8](=[O:12])[CH:9]([OH:11])[OH:10])=[CH:4][C:3]=1[F:13].O=[CH:15][CH:16]=O.C([O-])([O-])O[CH2:20][CH3:21].C1(C)C=CC(S(O)(=O)=O)=CC=1>C1(C)C=CC=CC=1.C(OCC)(=O)C>[Br:1][C:2]1[CH:7]=[CH:6][C:5]([C:8](=[O:12])[CH:9]([O:10][CH2:15][CH3:16])[O:11][CH2:20][CH3:21])=[CH:4][C:3]=1[F:13]

参加物

7

反応物 4

HCID 6101p-Toluenesulfonic acidHCID 7860GlyoxalHCID 53630039EthylorthoformateHCID 575165211-(4-Bromo-3-fluorophenyl)-2,2-dihydroxyethanone

生成物 1

HCID 575165221-(4-Bromo-3-fluorophenyl)-2,2-diethoxyethanone

試薬・触媒・溶媒 2

HCID 1140Toluene溶媒HCID 8857Ethyl Acetate溶媒

実験手順

To a mixture of 1-(4-bromo-3-fluorophenyl)-2,2-dihydroxyethanone or 4-bromo-3-fluorophenyl)(oxo)acetaldehyde (7.0 g, 28 mmol) in toluene (50 mL) was added ethyl orthoformate (12 mL, 70 mmol) and p-toluenesulfonic acid (200 mg, 1 mmol). The reaction mixture was refluxed for 4 h. The reaction mixture was cooled to RT, diluted with ethyl acetate, washed with aqueous sodium bicarbonate, water, brine, and dried over magnesium sulfate. Concentration under reduced pressure gave the desired product which was used in the next step without further purification.

後処理

  1. temperatureThe reaction mixture was refluxed for 4 h
  2. washwashed with aqueous sodium bicarbonate, water, brine
  3. dry with materialdried over magnesium sulfate
  4. concentrationConcentration under reduced pressure

出典と根拠

ORDレコード
ord-395c3aaa90f342b8b738a94ddc67ad38
出典データセット
uspto-grants-2010_08
特許番号
US07767675B2

反応ノート

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