Sulfuric Acid → 2,5-Cyclohexadiene-1,4-dione, 2,3,5-trimethyl-

HRID 727473

반응식

HRID 727473 반응식
[CH3:1][C:2]1[C:7]([CH3:8])=[CH:6][CH:5]=[C:4]([CH3:9])[C:3]=1[OH:10].C([O:15]O)(C)(C)C.S(=O)(=O)(O)O>C(O)(=O)C>[CH3:8][C:7]1[C:6](=[O:15])[CH:5]=[C:4]([CH3:9])[C:3](=[O:10])[C:2]=1[CH3:1]

참가 물질

5

반응물 3

HCID 1118Sulfuric AcidHCID 6410tert-Butyl hydroperoxideHCID 170162,3,6-Trimethylphenol

생성물 1

HCID 702912,5-Cyclohexadiene-1,4-dione, 2,3,5-trimethyl-수율 93%

시약·촉매·용매 1

HCID 176Acetic Acid용매3회

실험 절차

A solution of 13.6 g (100 mmol) of 2,3,6-trimethylphenol in 40 ml of acetic acid and a solution of 32.3 g (250 mmol) of 70% by weight aqueous tert-butyl hydroperoxide in 20 ml of acetic acid were simultaneously added dropwise to a stirred solution of 0.68 g (2.0 mmol) of iron 5,14-dihydrodibenzo[b,i][5,9,14,18]tetraaza[14]annulene and 0.5 ml of concentrated sulfuric acid in 50 ml of acetic acid at 40° C. with cooling. The reaction mixture was then subjected to steam distillation. The distillate was extracted by shaking with methylene chloride. The organic phase was shaken with aqueous sodium bicarbonate solution and then with water, separated from the aqueous phase, dried over magnesium sulfate, filtered and concentrated to a yellow oil, which slowly solidifed. 14.0 g (93%) of 2,3,5-trimethyl-p-benzoquinone were obtained in the form of yellow oily crystals.

후처리

  1. temperaturewith cooling
  2. distillationThe reaction mixture was then subjected to steam distillation
  3. extractionThe distillate was extracted
  4. stirringThe organic phase was shaken with aqueous sodium bicarbonate solution
  5. customwith water, separated from the aqueous phase
  6. dry with materialdried over magnesium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated to a yellow oil, which

출처 및 근거

ORD 기록
ord-0534e6c694ed4103982c42fa6480f9dc
출처 데이터셋
uspto-grants-1998_01
특허 번호
US05712416

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