Sodium Carbonate → 3-(1-Benzyl-1H-pyrazol-4-YL)aniline

HRID 240187

Reaktionsgleichung

Reaktionsgleichung von HRID 240187
[CH2:1]([N:8]1[CH:12]=[C:11](B(O)O)[CH:10]=[N:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.Br[C:17]1[CH:18]=[C:19]([CH:21]=[CH:22][CH:23]=1)[NH2:20].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>[CH2:1]([N:8]1[CH:12]=[C:11]([C:17]2[CH:18]=[C:19]([NH2:20])[CH:21]=[CH:22][CH:23]=2)[CH:10]=[N:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Komponenten

6

Edukt 3

HCID 10340Sodium CarbonateHCID 115623-BromoanilineHCID 33528811-Benzyl-1H-pyrazole-4-boronic acid

Produkt 1

HCID 633383203-(1-Benzyl-1H-pyrazol-4-YL)anilineAusbeute 94 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 178418397HCID 178418397, VerbindungKatalysatorHCID 80711,2-DimethoxyethaneLösungsmittel

Versuchsvorschrift

1-benzyl-1H-pyrazole-4-boronic acid (0.176 g, 0.872 mmol) and 3-bromoaniline (0.063 mL, 0.581 mmol) were combined in DME (3 mL) in a flame-dried, round-bottom flask. Na2CO3 (2M, 0.610 mL, 1.22 mmol) and Pd(PPh3)4 (0.02 g, 0.017 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 CH2Cl2. The organic phase was dried over MgSO4, filtered, and concentrated under vacuum. The crude product was purified by flash silica column chromatography (10-100% EtOAc/hexanes). The purification was monitored by TLC. The solvent was removed under vacuum from fractions containing product, resulting in 0.137 g in 94% yield.

Aufarbeitung

  1. temperatureThe reaction was refluxed overnight under argon flow
  2. customThe solvent was removed under vacuum
  3. dry with materialThe organic phase was dried over MgSO4
  4. filtrationfiltered
  5. concentrationconcentrated under vacuum
  6. customThe crude product was purified by flash silica column chromatography (10-100% EtOAc/hexanes)
  7. customThe purification
  8. customThe solvent was removed under vacuum from fractions
  9. additioncontaining product
  10. customresulting in 0.137 g in 94% yield

Quellen und Nachweise

ORD-Eintrag
ord-1afa840e393245ab9d71099b9f806c8f
Quelldatensatz
uspto-grants-2014_02
Patentnummer
US08642788B2

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