Toluene → 2-(4'-Bromophenyl)aniline

HRID 746762

Reaktionsgleichung

Reaktionsgleichung von HRID 746762
[Br:1][C:2]1[CH:7]=[CH:6][C:5](B(O)O)=[CH:4][CH:3]=1.I[C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][C:13]=1[NH2:18].C1(C)C=CC=CC=1.C([O-])([O-])=O.[Na+].[Na+]>CCOC(C)=O.O>[Br:1][C:2]1[CH:7]=[CH:6][C:5]([C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][C:13]=2[NH2:18])=[CH:4][CH:3]=1

Komponenten

7

Edukt 4

HCID 1140TolueneHCID 10340Sodium CarbonateHCID 119952-IodoanilineHCID 79599(4-Bromophenyl)boronic acid

Produkt 1

HCID 113686332-(4'-Bromophenyl)anilineAusbeute 64 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 8857Ethyl AcetateLösungsmittel2×

Versuchsvorschrift

Combine 4-bromophenylboronic acid (6.064 g, 30.195 mmol), 2-iodo-phenylamine (5.532 g, 25.257 mmol), toluene, 2N Na2CO3 (13 ml, 26 mmol), and tetrakis(triphenyl-phosphine)palladium(0) (0.849 g) and heat to 80° C. After 4 hours cool to room temperature and stir for 16 hours. Dilute the reaction with EtOAc and back extract water layer with EtOAc. Combine the organic layers and wash with H2O, and dry over Na2SO4, filter, and concentrate under reduced pressure. Purify the residue by flash chromatography (silica gel), eluting with first hexane and increasing up to 10% EtOAc/Hexane to afford 4′-bromo-biphenyl-2-ylamine (4.008 g, 64%). LCMS 247.

Aufarbeitung

  1. additionDilute
  2. washwash with H2O
  3. dry with materialdry over Na2SO4
  4. filtrationfilter
  5. concentrationconcentrate under reduced pressure
  6. customPurify the residue by flash chromatography (silica gel)
  7. washeluting with first hexane
  8. temperatureincreasing up to 10% EtOAc/Hexane

Quellen und Nachweise

ORD-Eintrag
ord-637d8c2b089c435c9e47f43bbec47e09
Quelldatensatz
uspto-grants-2008_07
Patentnummer
US07393868B2

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