p-Toluenesulfonic acid → Ethyl 6,6,6-trifluoro-3-oxohexanoate

HRID 1079022노트

반응식

HRID 1079022 반응식
[F:1][C:2]([F:15])([F:14])[CH2:3][CH2:4][C:5]([CH:7]([C:11]([OH:13])=[O:12])C(O)=O)=[O:6].[C:16]1(C)C=CC(S(O)(=O)=O)=C[CH:17]=1.C(=O)([O-])O.[Na+]>O>[F:15][C:2]([F:1])([F:14])[CH2:3][CH2:4][C:5]([CH2:7][C:11]([O:13][CH2:16][CH3:17])=[O:12])=[O:6]

참가 물질

5

반응물 3

HCID 6101p-Toluenesulfonic acidHCID 516892Sodium BicarbonateHCID 189709114,4,4-Trifluorobutyrylmalonic acid

생성물 1

HCID 18970913Ethyl 6,6,6-trifluoro-3-oxohexanoate수율 24,903.6%

시약·촉매·용매 1

HCID 962Water용매

실험 절차

A mixture of 179 g of the 4,4,4-trifluorobutyrylmalonic acid ditheyl ester thus obtained, 260 ml of water and 322 mg of p-toluenesulfonic acid was refluxed with vigorous stirring for 6 hours. The reaction solution was then poured into saturated aqueous sodium hydrogencarbonate solution and extracted three times with diethyl ether. The ether layers were combined and the combined layer was washed with brine, dried over anhydrous magnesium sulfate. After the drying agent was removed, the solvent was removed under reduced pressure. The obtained residue was distilled inder reduced pressure to yield 98.8 g of the desired ethyl 4,4,4-trifluorobutyrylacetate in a yield of 74%.

후처리

  1. customthus obtained
  2. extractionextracted three times with diethyl ether
  3. washthe combined layer was washed with brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. customAfter the drying agent was removed
  6. customthe solvent was removed under reduced pressure
  7. distillationThe obtained residue was distilled inder reduced pressure

출처 및 근거

ORD 기록
ord-14b67357ee6d4d22a27ae8c54587bce1
출처 데이터셋
uspto-grants-1996_08
특허 번호
US05550258

반응 노트

불러오는 중…