Sodium Carbonate → 5-(4-Tert-butylphenyl)furan-2-carbaldehyde

HRID 2197667

반응식

HRID 2197667 반응식
Br[C:2]1[CH:7]=[CH:6][C:5]([C:8]([CH3:11])([CH3:10])[CH3:9])=[CH:4][CH:3]=1.[CH:12]([C:14]1[O:18][C:17](B(O)O)=[CH:16][CH:15]=1)=[O:13].C(=O)([O-])[O-].[Na+].[Na+]>C(COC)OC.C(O)C.C(OCC)(=O)C.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[C:8]([C:5]1[CH:6]=[CH:7][C:2]([C:17]2[O:18][C:14]([CH:12]=[O:13])=[CH:15][CH:16]=2)=[CH:3][CH:4]=1)([CH3:11])([CH3:10])[CH3:9]

참가 물질

9

반응물 3

HCID 10340Sodium CarbonateHCID 775951-Bromo-4-tert-butylbenzeneHCID 27343555-Formylfuran-2-boronic acid

생성물 1

HCID 225667165-(4-Tert-butylphenyl)furan-2-carbaldehyde수율 72.2%

시약·촉매·용매 5

HCID 178418397HCID 178418397, 화합물촉매HCID 702Ethanol용매HCID 962Water용매2회HCID 80711,2-Dimethoxyethane용매HCID 8857Ethyl Acetate용매

실험 절차

To a round bottom flask containing 1-bromo-4-tert-butyl-benzene (1.5 g, 7.04 mmol) and 5-formyl-2-furan-boronic acid (1.47 g, 10.56 mmol) in dimethoxyethane (80 mL) and ethanol (20 mL) was added an aqueous solution of sodium carbonate (2.24 g, 21.12 mmol) m water (30 mL). The reaction mixture was stirred at room temperature for 5 minutes, followed by the addition of tetrakis(triphenylphosphine)palladium (404 mg, 0.35 mmol). The reaction mixture was heated at 70° C. for 1 h. The reaction mixture was cooled to room temperature, diluted with ethyl acetate (500 mL) and water (50 mL). The layers were separated and the aqueous layer was extracted with ethyl acetate (2×150 mL). The combined organic extracts were washed with brine, dried (sodium sulfate) and concentrated under vacuum. The crude product was purified by silica gel chromatography eluting with 20% ethyl acetate in hexanes to afford 5-(4-tert-butyl-phenyl)-furan-2-carbaldehyde (1.16 g, 72%) as a dark brown solid. 1H NMR (400 MHz, CDCl3): δ 1.35 (9H, s), 6.80 (1H, d, J=3.6 Hz), 7.31 (1H, d, J=3.6 Hz), 7.44-7.7.48 (2H, m), 7.74-7.77 (2H, m), 9.64 (1H, s); APCI-MS: 228.34.

후처리

  1. temperatureThe reaction mixture was heated at 70° C. for 1 h
  2. temperatureThe reaction mixture was cooled to room temperature
  3. customThe layers were separated
  4. extractionthe aqueous layer was extracted with ethyl acetate (2×150 mL)
  5. washThe combined organic extracts were washed with brine
  6. dry with materialdried (sodium sulfate)
  7. concentrationconcentrated under vacuum
  8. customThe crude product was purified by silica gel chromatography
  9. washeluting with 20% ethyl acetate in hexanes

출처 및 근거

ORD 기록
ord-03f78b92e0f1400d96206aa53f1d5bad
출처 데이터셋
uspto-grants-2012_12
특허 번호
US08338465B2

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