Potassium Carbonate → 6-(2,6-Dimethoxyphenyl)-1,1,4,4-tetramethy-1,2,3,4-tetrahydronaphthalene

HRID 488823

Reaktionsgleichung

Reaktionsgleichung von HRID 488823
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][CH:6]=[C:5]([O:9][CH3:10])[C:4]=1B(O)O.Br[C:15]1[CH:16]=[C:17]2[C:22](=[CH:23][CH:24]=1)[C:21]([CH3:26])([CH3:25])[CH2:20][CH2:19][C:18]2([CH3:28])[CH3:27].C(=O)([O-])[O-].[K+].[K+]>COCCOC.O.C(OCC)(=O)C.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>[CH3:1][O:2][C:3]1[CH:8]=[CH:7][CH:6]=[C:5]([O:9][CH3:10])[C:4]=1[C:24]1[CH:23]=[C:22]2[C:17](=[CH:16][CH:15]=1)[C:18]([CH3:28])([CH3:27])[CH2:19][CH2:20][C:21]2([CH3:26])[CH3:25]

Komponenten

8

Edukt 3

HCID 11430Potassium CarbonateHCID 2266856-Bromo-1,1,4,4-tetramethyl-1,2,3,4-tetrahydronaphthaleneHCID 2734343(2,6-Dimethoxyphenyl)boronic acid

Produkt 1

HCID 211069166-(2,6-Dimethoxyphenyl)-1,1,4,4-tetramethy-1,2,3,4-tetrahydronaphthaleneAusbeute 103,5 %

Reagenzien, Katalysatoren, Lösungsmittel 4

HCID 178418397HCID 178418397, VerbindungKatalysatorHCID 962WaterLösungsmittelHCID 80711,2-DimethoxyethaneLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

A mixture of 2,6-dimethoxy-phenylboronic acid (1.0 g, 5.48 mmol), 6-bromo-1,1,4,4 tetramethy 1,2,3,4-tetrahydronaphthalene (0.73 g, 2.74 mmol) and potassium carbonate (1.50 g, 10.96 mmol) in 1,2-dimethoxyethane (20 mL) and water (1.0 mL) was degassed with argon for 15 minutes. Tetrakis(triphenylphosphine)palladium(0) (0.60 g, 0.54 mmol) was added and the mixture heated at reflux under argon for 5 hours. The solution was cooled to room temperature, diluted with ethyl acetate and washed successively with water and brine, dried over anhydrous magnesium sulfate, filtered and evaporated. The residue was chromatographed on silica gel (eluent: ethyl acetate/hexane, 1:9) to give 0.92 g of 6-(2,6-Dimethoxyphenyl)-1,1,4,4-tetramethy-1,2,3,4-tetrahydronaphthlene.

Aufarbeitung

  1. customwas degassed with argon for 15 minutes
  2. temperaturethe mixture heated
  3. temperatureat reflux under argon for 5 hours
  4. washwashed successively with water and brine
  5. dry with materialdried over anhydrous magnesium sulfate
  6. filtrationfiltered
  7. customevaporated
  8. customThe residue was chromatographed on silica gel (eluent: ethyl acetate/hexane, 1:9)

Quellen und Nachweise

ORD-Eintrag
ord-5cd3d5092cda4ff0ace1b642d279ab91
Quelldatensatz
uspto-grants-2005_12
Patentnummer
US06974826B2

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