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Sodium Carbonate → 2-(4'-Ethyl-2,3-difluorobiphenyl-4-yl)selenophene

HRID 1873434
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1873434
Br[C:2]1[Se:3][CH:4]=[CH:5][CH:6]=1.[F:7][C:8]1[C:13]([F:14])=[C:12](B(O)O)[CH:11]=[CH:10][C:9]=1[C:18]1[CH:23]=[CH:22][C:21]([CH2:24][CH3:25])=[CH:20][CH:19]=1.C(=O)([O-])[O-].[Na+].[Na+]>C1(C)C=CC=CC=1.C(O)C.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>[CH2:24]([C:21]1[CH:22]=[CH:23][C:18]([C:9]2[CH:10]=[CH:11][C:12]([C:2]3[Se:3][CH:4]=[CH:5][CH:6]=3)=[C:13]([F:14])[C:8]=2[F:7])=[CH:19][CH:20]=1)[CH3:25]
KomponentenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

6

Edukt 3

HCID 10340Sodium CarbonateHCID 1370132-BromoselenopheneHCID 184694332,3-Difluoro-4'-ethylbiphenyl-4-ylboronic acid

Produkt 1

HCID 594562952-(4'-Ethyl-2,3-difluorobiphenyl-4-yl)selenophene

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 178418397HCID 178418397, VerbindungKatalysator
HCID 21863594Toluene ethanolLösungsmittel

Versuchsvorschrift

A mixture of 56.0 g (0.27 mol) of 2-bromoselenophene, 70.0 g (0.27 mol) of 2,3-difluoro-4′-ethylbiphenyl-4-ylboronic acid, 22.0 g (19.0 mmol) of tetrakis(triphenylphosphine)palladium(0) and 800 ml of 2 N sodium carbonate soln. in 2.5 l of toluene/ethanol (1:1) is heated at 90° C. for 17 h. After cooling, the organic phase is separated off, and the aqueous phase is extracted with toluene. The combined organic phases are washed with water, and the solution is dried using sodium sulfate. The solution is concentrated to dryness, and the residue is purified by column chromatography (SiO2, toluene). The further purification is carried out by recrystallisation from ethanol and n-heptane. 2-(4′-Ethyl-2,3-difluorobiphenyl-4-yl)-selenophene is obtained as a yellowish solid.

Aufarbeitung

  1. temperatureAfter cooling
  2. customthe organic phase is separated off
  3. extractionthe aqueous phase is extracted with toluene
  4. washThe combined organic phases are washed with water
  5. customthe solution is dried
  6. concentrationThe solution is concentrated to dryness
  7. customthe residue is purified by column chromatography (SiO2, toluene)
  8. customThe further purification
  9. customis carried out by recrystallisation from ethanol and n-heptane

Quellen und Nachweise

ORD-Eintrag
ord-8454be194d104d5eb45a02209f4523d5
Quelldatensatz
uspto-grants-2012_11
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08304036B2

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