Reaktion #554601

Reaktionsgleichung

dioxane

triphenylenyl trifluoromethanesulfonate

bis(pinacolato)diboron

potassium acetate

→

triphenylene-2-boronic acid

Ausbeute 51.9%

Lösungsmittel

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturthe resultant was refluxed
2. 2
   Temperaturwhile heating for 8 hours
3. 3
   Extraktionfollowed by extraction with toluene
4. 4
   SonstigeAn aqueous phase was removed
5. 5
   Waschenan organic phase was washed with water and saturated brine
6. 6
   Trocknendried with magnesium sulfate
7. 7
   SonstigeMagnesium sulfate was removed
8. 8
   workup.DISTILLATIONthe solvent was distilled under reduced pressure
9. 9
   SonstigeThe resulting residue was purified by means of silica gel column chromatography

Vorschrift

Under an argon atmosphere, 37.6 g of triphenylenyl trifluoromethanesulfonate, 27.9 g of bis(pinacolato)diboron, 2.45 g of 1,1′-bis(diphenylphosphino)ferrocene palladium (II) dichloride dichloromethane complex, 1.66 g of 1,1′-bis(diphenylphosphino)ferrocene and 29.4 g of potassium acetate were placed in a flask. 600 mL of anhydrous dioxane was added thereto, and the resultant was refluxed with stirring while heating for 8 hours. After cooling to room temperature, 300 mL of water was added to the reaction solution, followed by extraction with toluene. An aqueous phase was removed, and an organic phase was washed with water and saturated brine, and then dried with magnesium sulfate. Magnesium sulfate was removed and the solvent was distilled under reduced pressure. The resulting residue was purified by means of silica gel column chromatography, whereby 14.1 g (yield: 40%) of triphenylene-2-boronic acid picohal ester was obtained.

Quelle