Sodium Carbonate → 3-(2,3-Dihydro-1-benzofuran-5-yl)aniline

HRID 240091

Reaktionsgleichung

Reaktionsgleichung von HRID 240091
[O:1]1[C:5]2[CH:6]=[CH:7][C:8](B(O)O)=[CH:9][C:4]=2[CH2:3][CH2:2]1.Br[C:14]1[CH:15]=[C:16]([CH:18]=[CH:19][CH:20]=1)[NH2:17].C([O-])([O-])=O.[Na+].[Na+]>COCCOC.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>[O:1]1[C:5]2[CH:6]=[CH:7][C:8]([C:14]3[CH:15]=[C:16]([NH2:17])[CH:18]=[CH:19][CH:20]=3)=[CH:9][C:4]=2[CH2:3][CH2:2]1

Komponenten

6

Edukt 3

HCID 10340Sodium CarbonateHCID 115623-BromoanilineHCID 2773380(2,3-Dihydro-1-benzofuran-5-yl)boronic acid

Produkt 1

HCID 41319673-(2,3-Dihydro-1-benzofuran-5-yl)anilineAusbeute 78 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 178418397HCID 178418397, VerbindungKatalysatorHCID 80711,2-DimethoxyethaneLösungsmittel

Versuchsvorschrift

2,3-dihydrobenzofuran-5-boronic acid (0.114 g, 0.693 mmol) and 3-bromoaniline (0.05 mL, 0.462 mmol) were combined in DME (2 mL) in a flame-dried, round-bottom flask. Na2CO3 (2M, 0.485 mL, 0.970 mmol) and Pd(PPh3)4 (0.017 g, 0.014 mmol) were added to the stirred solution. The reaction was refluxed overnight under argon flow, and subsequently cooled to room temperature. The solvent was removed under vacuum and the resulting residue was resuspended in H2O and extracted with CH2Cl2. The organic phase was dried over MgSO4 and concentrated under vacuum. The crude product was purified by silica column chromatography (5-20% EtOAc/hexanes). The purification was monitored by TLC. The solvent was removed under vacuum from fractions containing product, resulting in 0.0762 g in 78% yield.

Aufarbeitung

  1. temperatureThe reaction was refluxed overnight under argon flow
  2. customThe solvent was removed under vacuum
  3. extractionextracted with CH2Cl2
  4. dry with materialThe organic phase was dried over MgSO4
  5. concentrationconcentrated under vacuum
  6. customThe crude product was purified by silica column chromatography (5-20% EtOAc/hexanes)
  7. customThe purification
  8. customThe solvent was removed under vacuum from fractions
  9. additioncontaining product
  10. customresulting in 0.0762 g in 78% yield

Quellen und Nachweise

ORD-Eintrag
ord-4cc307f7471e44389c3fd4be9a1d5a3a
Quelldatensatz
uspto-grants-2014_02
Patentnummer
US08642788B2

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