Sodium Carbonate → 4-(Pyridin-3-yl)benzaldehyde

HRID 856042

Reaktionsgleichung

Reaktionsgleichung von HRID 856042
Br[C:2]1[CH:9]=[CH:8][C:5]([CH:6]=[O:7])=[CH:4][CH:3]=1.C(B(CC)[C:13]1[CH:14]=[N:15][CH:16]=[CH:17][CH:18]=1)C.C(=O)([O-])[O-].[Na+].[Na+]>C1(C)C=CC=CC=1.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>[N:15]1[CH:16]=[CH:17][CH:18]=[C:13]([C:2]2[CH:9]=[CH:8][C:5]([CH:6]=[O:7])=[CH:4][CH:3]=2)[CH:14]=1

Komponenten

7

Edukt 3

HCID 10340Sodium CarbonateHCID 707414-BromobenzaldehydeHCID 6428513-(Diethylboryl)pyridine

Produkt 1

HCID 36930464-(Pyridin-3-yl)benzaldehydeAusbeute 72,3 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 178418397HCID 178418397, VerbindungKatalysatorHCID 1140TolueneLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

A mixture of 4-bromobenzaldehyde (2 g, 10.8 mmol), diethyl(3-pyridyl)borane (1.75 g, 11.9 mmol), tetrakis(triphenylphosphine)palladium (375 mg, 0.32 mmol), and 2N sodium carbonate aqueous solution(10.8 ml, 21.6 mmol) in toluene (40 ml) was heated under reflux under a nitrogen atmosphere overnight. The reaction mixture was allowed to return to room temperature and diluted with ethyl acetate. The mixture was washed with water and brine, and dried over sodium sulfate. After filtration, the filtrate was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (n-hexane/ethyl acetate=1/1) to afford 4-(pyridin-3-yl)benzaldehyde (1.43 g, yield 72%) as a pale yellow crystalline powder.

Aufarbeitung

  1. temperaturewas heated
  2. temperatureunder reflux under a nitrogen atmosphere overnight
  3. customto return to room temperature
  4. washThe mixture was washed with water and brine
  5. dry with materialdried over sodium sulfate
  6. filtrationAfter filtration
  7. concentrationthe filtrate was concentrated under reduced pressure
  8. customthe residue was purified by silica gel column chromatography (n-hexane/ethyl acetate=1/1)

Quellen und Nachweise

ORD-Eintrag
ord-6fca2443e6054be4a37a9e37ad4e5354
Quelldatensatz
uspto-grants-2007_08
Patentnummer
US07262212B2

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