Cesium fluoride → HCID 24825943, Verbindung

HRID 2043318Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2043318
Br[CH:2]=[C:3]1[O:7][C:6](=[O:8])[CH:5]=[CH:4]1.[F:9][C:10]([F:21])([F:20])[C:11]1[CH:12]=[C:13](B(O)O)[CH:14]=[CH:15][CH:16]=1.[F-].[Cs+]>[I-].C([N+](CCCC)(CCCC)CCCC)CCC.C1(C)C=CC=CC=1.O.[Cl-].[Na+].O.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[F:9][C:10]([F:21])([F:20])[C:11]1[CH:16]=[C:15]([CH:14]=[CH:13][CH:12]=1)/[CH:2]=[C:3]1/[CH:4]=[CH:5][C:6](=[O:8])[O:7]/1

Komponenten

9

Edukt 3

HCID 25953Cesium fluorideHCID 27343883-(Trifluoromethyl)phenylboronic acidHCID 672283605-(Bromomethylidene)furan-2(5H)-one

Produkt 1

HCID 24825943HCID 24825943, Verbindung

Reagenzien, Katalysatoren, Lösungsmittel 5

HCID 67553Tetrabutylammonium IodideKatalysatorHCID 178418476HCID 178418476, VerbindungKatalysatorHCID 962WaterLösungsmittelHCID 1140TolueneLösungsmittelHCID 57417360Sodium chloride; waterLösungsmittel

Versuchsvorschrift

A mixture containing 5-bromomethylene-2(5H)furanone (0.175 g, 1 mmol), 3-trifluoromethylphenylboronic acid (0.228 g, 1.2 mmol), trans-dichlorobis(triphenylphosphine)palladium (II) (0.035 g, 0.05 mmol), tetrabutylammonium iodide (0.018 g, 0.05 mmol) and cesium fluoride (0.456 g, 3 mmol) in toluene (10 mL) and water (10 mL) were stirred at reflux for 24 hours under nitrogen. After cooling, brine (50 mL) was added and the product extracted with ethyl acetate (50 mL×3). The organic fractions were combined, washed with brine (50 mL×3), dried over anhydrous sodium sulfate and evaporated to dryness to give a brown solid. The resulting solid was chromatographed (silica gel: eluent 50:50 dichloromethane/light petroleum) giving the desired product 30 as a light brown powder. Yield 0.180 g (75%), m.p. 69-71° C., UV-Vis λmax (MeOH) 223 (15166), 323 (31738) nm.

Aufarbeitung

  1. temperatureat reflux for 24 hours under nitrogen
  2. temperatureAfter cooling
  3. extractionthe product extracted with ethyl acetate (50 mL×3)
  4. washwashed with brine (50 mL×3)
  5. dry with materialdried over anhydrous sodium sulfate
  6. customevaporated to dryness
  7. customto give a brown solid
  8. customThe resulting solid was chromatographed (silica gel: eluent 50:50 dichloromethane/light petroleum)

Quellen und Nachweise

ORD-Eintrag
ord-3c1bf9c1b6994f01b699a1611e2b9124
Quelldatensatz
uspto-grants-2013_11
Patentnummer
US08586618B2

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