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Potassium Carbonate → Methyl 4-(4-pyridinyl)benzoate

HRID 478644
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 478644
COB([C:5]1[CH:10]=[CH:9][C:8]([C:11]([OH:13])=[O:12])=[CH:7][CH:6]=1)O.Br[C:15]1[CH:20]=[CH:19][N:18]=[CH:17][CH:16]=1.[C:21](=O)([O-])[O-].[K+].[K+]>COCCOC.[Pd].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>[CH3:21][O:13][C:11](=[O:12])[C:8]1[CH:7]=[CH:6][C:5]([C:15]2[CH:20]=[CH:19][N:18]=[CH:17][CH:16]=2)=[CH:10][CH:9]=1
KomponentenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

6

Edukt 3

HCID 11430Potassium CarbonateHCID 142684-BromopyridineHCID 669046664-Carboxybenzeneboronic acid methyl ester

Produkt 1

HCID 5152686Methyl 4-(4-pyridinyl)benzoate

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 11979704Tetrakis(triphenylphosphine)palladiumKatalysator
HCID 8071
1,2-Dimethoxyethane
Lösungsmittel

Versuchsvorschrift

4-Carboxybenzeneboronic acid methyl ester (248 mmol) from A, 4-bromopyridine (248 mmol), tetrakis-(triphenylphosphin)-palladium (2.5 mmol) and potassium carbonate (744 mmol) are suspended in 1,2-dimethoxyethane (1100 ml). The stirred mixture is heated under reflux for 8 hours. After cooling the solvent is evaporated and water is added to the residue which is then extracted three times with ethyl acetate. The combined extract is dried over sodium sulfate and evaporated. The residue is suspended in diethylether and the solid filtered of and dried (vacuum). A pale-brown powder with mp. 99-101° C., Rf=0.39 (CH2Cl2/MeOH=95:5) is obtained.

Aufarbeitung

  1. temperatureThe stirred mixture is heated
  2. temperatureunder reflux for 8 hours
  3. temperatureAfter cooling the solvent
  4. customis evaporated
  5. additionwater is added to the residue which
  6. extractionis then extracted three times with ethyl acetate
  7. extractionThe combined extract
  8. dry with materialis dried over sodium sulfate
  9. customevaporated
  10. filtrationthe solid filtered of and
  11. customdried (vacuum)
  12. customA pale-brown powder with mp. 99-101° C., Rf=0.39 (CH2Cl2/MeOH=95:5) is obtained

Quellen und Nachweise

ORD-Eintrag
ord-d1bf3cdcade547f1abde3374dfe4e52c
Quelldatensatz
uspto-grants-2003_11
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US06642239B2

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