1,2-Dimethoxyethane → HCID 66672864, Verbindung

Temperatur

80 °C

(4R)-4-Methyl-4-[2-(5-iodo-1-methylpyrrol-2-yl)ethyl]-1,3-oxazolidin-2-one (0.3101 g, 0.92 mmol) obtained in Example (40a), 2-[3-(2-cyclohexylethyloxy)phenyl]-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (0.4646 g, 1.41 mmol), dichlorobis(triphenylphopsphine)palladium(II) (63.1 mg, 0.09 mmol) and cesium carbonate (0.6006 g, 1.81 mmol) were suspended in a mixed solvent of dimethoxyethane (8 ml) and water (2 ml) and stirred at 80° C. for 6 hours. After cooling, water was added to the reaction mixture, and the resulting mixture was extracted with ethyl acetate. The extract was washed successively with water and saturated aqueous sodium chloride solution and dried over anhydrous magnesium sulfate. After filtration, the solvent was removed in vacuo, and the residue was purified by chromatography on a silica gel column using a mixed solvent of ethyl acetate and hexane (3:2) as the eluent to afford the crude product. Furthermore, the crude product thus obtained was purified using a preparative reversed phase HPLC column (Inertsil ODS-3 (2.0 cm×25 cm), GL Science, mobile phase: acetonitrile/water (75:25), flow rate: 10 ml/min] to afford the title compound (41.1 mg, yield: 11%).

1. temperatureAfter cooling
2. extractionthe resulting mixture was extracted with ethyl acetate
3. washThe extract was washed successively with water and saturated aqueous sodium chloride solution
4. dry with materialdried over anhydrous magnesium sulfate
5. filtrationAfter filtration
6. customthe solvent was removed in vacuo
7. customthe residue was purified by chromatography on a silica gel column
8. customto afford the crude product
9. customFurthermore, the crude product thus obtained
10. customwas purified

ORD-Eintrag

ord-955c838cb8684983badc308e68f94c1e

Quelldatensatz

uspto-grants-2011_11

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08067396B2