Bromide ion → 1-[3-Tert-butyl-5-(3-hydroxy-2,2-dimethylpropoxy)-4-methoxyphenyl]ethanone

HRID 657974노트

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HRID 657974 반응식
[C:1]([C:5]1[CH:6]=[C:7]([C:14](=[O:16])[CH3:15])[CH:8]=[C:9]([OH:13])[C:10]=1[O:11][CH3:12])([CH3:4])([CH3:3])[CH3:2].C([O:20][CH2:21][C:22]([CH3:26])([CH3:25])[CH2:23]Br)(=O)C.C(=O)([O-])[O-].[Cs+].[Cs+].[Br-]>CN(C=O)C>[C:1]([C:5]1[CH:6]=[C:7]([C:14](=[O:16])[CH3:15])[CH:8]=[C:9]([O:13][CH2:23][C:22]([CH3:26])([CH3:25])[CH2:21][OH:20])[C:10]=1[O:11][CH3:12])([CH3:4])([CH3:2])[CH3:3]

참가 물질

6

반응물 4

HCID 259Bromide ionHCID 10796Cesium carbonateHCID 133577153-Bromo-2,2-dimethylpropyl acetateHCID 581369461-(3-Tert-butyl-5-hydroxy-4-methoxyphenyl)ethanone

생성물 1

HCID 580458811-[3-Tert-butyl-5-(3-hydroxy-2,2-dimethylpropoxy)-4-methoxyphenyl]ethanone수율 42.2%

시약·촉매·용매 1

HCID 6228Dimethylformamide용매

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온도
150 °C

실험 절차

1-(3-tert-Butyl-5-hydroxy-4-methoxyphenyl)ethanone (O3.070; 2.00 g) and 3-bromo-2,2-dimethylpropyl acetate (2.54 g) were dissolved in DMF (15 ml), and cesium carbonate (3.69 g) was added. After stirring at 150° C. and max. 15 bar in a microwave for 2.5 h, a further 0.5 eq. of the bromide was added and the mixture was placed into the microwave at 150° C. for a further 2 h. Then the mixture was concentrated by rotary evaporation and the residue was partitioned between DCM and water. The DCM phase was removed, dried over magnesium sulfate, filtered and concentrated. The residue was purified using silica gel (120 g cartridge, n-heptane/MtB ether gradient of 0-50% within 60 min). 1.17 g of the title compound were obtained.

후처리

  1. waitthe mixture was placed into the microwave at 150° C. for a further 2 h
  2. concentrationThen the mixture was concentrated by rotary evaporation
  3. customthe residue was partitioned between DCM and water
  4. customThe DCM phase was removed
  5. dry with materialdried over magnesium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customThe residue was purified
  9. customsilica gel (120 g cartridge, n-heptane/MtB ether gradient of 0-50% within 60 min)

출처 및 근거

ORD 기록
ord-5886e22312b8419aa10f0ec847f42304
출처 데이터셋
uspto-grants-2011_12
특허 번호
US08076336B2

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