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4-(Trifluoromethyl)phenylboronic acid → 2,6-Dimethyl-4-nitro-4'-(trifluoromethyl)biphenyl

HRID 1427441
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1427441
Br[C:2]1[C:7]([CH3:8])=[CH:6][C:5]([N+:9]([O-:11])=[O:10])=[CH:4][C:3]=1[CH3:12].[F:13][C:14]([F:25])([F:24])[C:15]1[CH:20]=[CH:19][C:18](B(O)O)=[CH:17][CH:16]=1.O.[F-].[K+]>C1(C)C=CC=CC=1.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>[CH3:12][C:3]1[CH:4]=[C:5]([N+:9]([O-:11])=[O:10])[CH:6]=[C:7]([CH3:8])[C:2]=1[C:18]1[CH:19]=[CH:20][C:15]([C:14]([F:25])([F:24])[F:13])=[CH:16][CH:17]=1
KomponentenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

6

Edukt 3

HCID 27343894-(Trifluoromethyl)phenylboronic acidHCID 70220962-Bromo-1,3-dimethyl-5-nitrobenzeneHCID 23675105Potassium fluoride hydrate

Produkt 1

HCID 674856592,6-Dimethyl-4-nitro-4'-(trifluoromethyl)biphenylAusbeute 43,4 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 178418397
HCID 178418397, Verbindung
Katalysator
HCID 1140TolueneLösungsmittel

Versuchsvorschrift

To a solution of 2-bromo-1,3-dimethyl-5-nitrobenzene (2.7 g, 11.7 mmol) in toluene (36 mL) was added tetrakis(triphenylphosphine)palladium(0) (1.36 g, 1.17 mmol), 4-(trifluoromethyl)phenylboronic acid (4.46 g, 23.5 mmol), and potassium fluoride hydrate (3.31 g, 43 mmol). The reaction was purged with nitrogen three times. Water (9 mL) was added and the reaction was refluxed overnight. The reaction was diluted with saturated ammonium chloride and the layers were separated. The organic layer was washed with water (3×40 mL) and brine, dried over sodium sulfate, filtered and concentrated. Purification by column chromatography gave 2,6-dimethyl-4-nitro-4′-(trifluoromethyl)biphenyl (1.5 g, 43%) as a yellow solid. 1H NMR (400 MHz, CDCl3, δ): 7.99 (s, 2H), 7.75 (d, 2H), 7.26 (s, 1H), 7.25 (s, 1H), 2.10 (s, 6H).

Aufarbeitung

  1. customThe reaction was purged with nitrogen three times
  2. additionWater (9 mL) was added
  3. temperaturethe reaction was refluxed overnight
  4. additionThe reaction was diluted with saturated ammonium chloride
  5. customthe layers were separated
  6. washThe organic layer was washed with water (3×40 mL) and brine
  7. dry with materialdried over sodium sulfate
  8. filtrationfiltered
  9. concentrationconcentrated
  10. customPurification by column chromatography

Quellen und Nachweise

ORD-Eintrag
ord-3d52debfcdb748c5b78feac31231aab6
Quelldatensatz
uspto-grants-2015_01
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08933104B2

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