1,2-Dimethoxyethane → Ethyl [2,4'-bipyridine]-3-carboxylate

HRID 538469Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 538469
Cl[C:2]1[N:12]=[CH:11][CH:10]=[CH:9][C:3]=1[C:4]([O:6][CH2:7][CH3:8])=[O:5].[N:13]1[CH:18]=[CH:17][C:16](B(O)O)=[CH:15][CH:14]=1.C(=O)([O-])[O-].[Na+].[Na+].COCCOC>O.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>[N:12]1[CH:11]=[CH:10][CH:9]=[C:3]([C:4]([O:6][CH2:7][CH3:8])=[O:5])[C:2]=1[C:16]1[CH:17]=[CH:18][N:13]=[CH:14][CH:15]=1

Komponenten

7

Edukt 4

HCID 80711,2-DimethoxyethaneHCID 10340Sodium CarbonateHCID 2734379(Pyridin-4-yl)boronic acidHCID 2796614Ethyl chloronicotinate

Produkt 1

HCID 46317743Ethyl [2,4'-bipyridine]-3-carboxylateAusbeute 70,8 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 178418397HCID 178418397, VerbindungKatalysatorHCID 962WaterLösungsmittel2×

Reaktionsbedingungen

Temperatur
100 °C

Versuchsvorschrift

A mixture of ethyl 2-chloronicotinate (16.2 g), pyridine-4-boronic acid (12.9 g), sodium carbonate (27.8 g), tetrakis(triphenylphosphine)palladium(0) (5.04 g), water (50.0 mL) and DME (250 mL) was stirred overnight at 100° C. under a nitrogen atmosphere. The reaction mixture was diluted with water, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (NH, ethyl acetate/hexane) to give the title compound (14.1 g).

Aufarbeitung

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe extract was washed with saturated brine
  3. dry with materialdried over anhydrous sodium sulfate
  4. customThe solvent was evaporated under reduced pressure
  5. customThe residue was purified by silica gel column chromatography (NH, ethyl acetate/hexane)

Quellen und Nachweise

ORD-Eintrag
ord-fedb100fda1847898c88d6b844668122
Quelldatensatz
uspto-grants-2014_10
Patentnummer
US08865717B2

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