Reaktion #69529

Reaktionsgleichung

1-bromo-3,5-dimethoxybenzene

2-dicyclohexylphosphino-2′,6′-dimethoxybiphenyl

cesium carbonate

→

title compound

1-Cyclopropyl-3,5-dimethoxybenzene

Lösungsmittel

water

dioxane

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   Extraktionwas extracted with ethyl acetate
2. 2
   Trocknendried over anhydrous magnesium sulfate
3. 3
   workup.DISTILLATIONthe solvent was distilled off under reduced pressure
4. 4
   SonstigeThe residue was purified by silica gel column chromatography (n-heptane/ethyl acetate: 3/1)

Vorschrift

To a solution of 1-bromo-3,5-dimethoxybenzene (2.00 g, 9.21 mmol) in dioxane (30 mL) and water (10 mL) were added potassium cyclopropyl trifluoroborate (2.73 g, 18.4 mmol), 2-dicyclohexylphosphino-2′,6′-dimethoxybiphenyl (756 mg, 1.84 mmol), palladium(II) acetate (207 mg, 0.92 mmol) and cesium carbonate (18.0 g, 55.3 mmol), and the mixture was heated at 100° C. for 16 hours. After the reaction was completed, water was added to the reaction mixture, which was extracted with ethyl acetate and dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (n-heptane/ethyl acetate: 3/1) to obtain the title compound (1.61 g, 9.03 mmol).

Quelle