Bromobenzene → 4-Phenyl-1H-indole

HRID 982975Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 982975
CC1(C)C(C)(C)OB([C:9]2[CH:17]=[CH:16][CH:15]=[C:14]3[C:10]=2[CH:11]=[CH:12][NH:13]3)O1.N1[C:27]2[CH:26]=[CH:25][CH:24]=[C:23](B([O-])[O-])[C:22]=2C=C1.BrC1C=CC=CC=1.[OH-].[Na+]>C1COCC1.[Pd]>[C:22]1([C:9]2[CH:17]=[CH:16][CH:15]=[C:14]3[C:10]=2[CH:11]=[CH:12][NH:13]3)[CH:23]=[CH:24][CH:25]=[CH:26][CH:27]=1

Komponenten

7

Edukt 4

HCID 7961BromobenzeneHCID 14798Sodium HydroxideHCID 113224711H-Indole-4-boronic acid, pinacol esterHCID 865876564-Indoleboronate

Produkt 1

HCID 158062984-Phenyl-1H-indoleAusbeute 78 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 23938PalladiumKatalysatorHCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
70 °C

Versuchsvorschrift

To a mixture of 4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)1H-indole (pinacole 4-indoleboronate (2 g, 8.2 mmol) and 3-bromobenzene (0.87 mL, 8.3 mmol) in THF (28 mL) were added Palladium catalyst Pd(PPh3)4 (284 mg, 0.25 mmol) and the freshly prepared sodium hydroxide solution (984 mg in 9 mL of water). The system was degassed and then charged with nitrogen for three times. The mixture was stirred under nitrogen at 70° C. oil bath for 6 hours. The reaction solution was cooled to room temperature, diluted with ethyl acetate and separated from water layer. The ethyl acetate solution was washed by brine, dried over Na2SO4 and concentrated. The residue was purified on a silica gel column eluting with hexanes:EtOAc 9:1 to give 1.38 g (78%) of 4-phenyl-1H-indole as a colorless liquid.

Aufarbeitung

  1. customThe system was degassed
  2. additioncharged with nitrogen for three times
  3. temperatureThe reaction solution was cooled to room temperature
  4. additiondiluted with ethyl acetate
  5. customseparated from water layer
  6. washThe ethyl acetate solution was washed by brine
  7. dry with materialdried over Na2SO4
  8. concentrationconcentrated
  9. customThe residue was purified on a silica gel column
  10. washeluting with hexanes:EtOAc 9:1

Quellen und Nachweise

ORD-Eintrag
ord-7868c3ce25084aeaacfcf29dbb412fc8
Quelldatensatz
uspto-grants-2005_03
Patentnummer
US06861418B2

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