Ethanol → Ethyl 2',4'-dimethyl[1,1'-biphenyl]-3-carboxylate

HRID 273377

Reaktionsgleichung

[CH3:1][C:2]1[CH:7]=[C:6]([CH3:8])[CH:5]=[CH:4][C:3]=1B(O)O.Br[C:13]1[CH:14]=[C:15]([CH:21]=[CH:22][CH:23]=1)[C:16]([O:18][CH2:19][CH3:20])=[O:17].C(=O)([O-])[O-].[Cs+].[Cs+].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.C1(C)C=CC=CC=1>[CH3:1][C:2]1[CH:7]=[C:6]([CH3:8])[CH:5]=[CH:4][C:3]=1[C:22]1[CH:23]=[CH:13][CH:14]=[C:15]([C:16]([O:18][CH2:19][CH3:20])=[O:17])[CH:21]=1

Komponenten

Reaktionsbedingungen

Temperatur: 70 °C

Versuchsvorschrift

(2,4-Dimethylphenyl)boronic acid (3.0 g, 20.0 mmol), ethyl 3-bromobenzoate (4.3 g, 18.8 mmol) and cesium carbonate (9.8 g, 30.0 mmol) were added to a mixture of ethanol (20 mL) and toluene (80 mL), and after argon substitution, tetrakis(triphenylphosphine)palladium(0) (0.30 g, 0.26 mmol) was added. The reaction mixture was stirred under an argon atmosphere at 70° C. for 18 hrs. The reaction mixture was cooled and insoluble material was filtered off through celite. The filtrate was concentrated under reduced pressure and the residue was purified by silica gel column chromatography (ethyl acetate:hexane=1:10) to give the title compound (5.0 g, yield 100%) as a colorless oil.

Aufarbeitung

temperatureThe reaction mixture was cooled
filtrationinsoluble material was filtered off through celite
concentrationThe filtrate was concentrated under reduced pressure
customthe residue was purified by silica gel column chromatography (ethyl acetate:hexane=1:10)

Quellen und Nachweise

ORD-Eintrag: ord-a82fda5bbb3f4b1b9fdea821085eb06c
Quelldatensatz: uspto-grants-2008_11
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US07456218B2

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