4-Nitrophenol → 4-(Difluoromethoxy)nitrobenzene

HRID 3020

反応式

HRID 3020 の反応式
[N+:1]([C:4]1[CH:9]=[CH:8][C:7]([OH:10])=[CH:6][CH:5]=1)([O-:3])=[O:2].Cl[C:12]([F:18])([F:17])C(OC)=O.C(=O)([O-])[O-].[K+].[K+].C(OCC)(=O)C>CN(C=O)C>[F:17][CH:12]([F:18])[O:10][C:7]1[CH:8]=[CH:9][C:4]([N+:1]([O-:3])=[O:2])=[CH:5][CH:6]=1

参加物

6

反応物 4

HCID 9804-NitrophenolHCID 8857Ethyl AcetateHCID 11430Potassium CarbonateHCID 73935Methyl chlorodifluoroacetate

生成物 1

HCID 27370144-(Difluoromethoxy)nitrobenzene収率 65%

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

実験手順

4-Nitrophenol (0.14 g, 1.0 mmol, Aldrich), methyl chlorodifluoroacetate (0.29 g, 2.0 mmol, Aldrich) and potassium carbonate (0.29 g, 2.1 mmol) were combined in dry DMF (0.5 mL) under an argon atmosphere. After stirring at 95°-100° C. for 0.5 h, the mixture was cooled to RT, ethyl acetate (20 mL) was added and the organic layer was washed three times with 10% NaOH. The organic extract was dried (MgSO4), filtered and evaporated. The residue was purified by flash chromatography (silica gel, 20% ether/hexanes) to provide the title compound as a white solid (0.12 g, 65%). mp 33°-35° C.

後処理

  1. washthe organic layer was washed three times with 10% NaOH
  2. extractionThe organic extract
  3. dry with materialwas dried (MgSO4)
  4. filtrationfiltered
  5. customevaporated
  6. customThe residue was purified by flash chromatography (silica gel, 20% ether/hexanes)

出典と根拠

ORDレコード
ord-78322038f273421dabe49798105b950a
出典データセット
uspto-grants-1998_03
特許番号
US05731477

関連ノート

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