2,2,2-Trifluoroethanol → 1-Nitro-4-(2,2,2-trifluoroethoxy)benzene

Temperatur

80 °C

1-Fluoro-4-nitrobenzene (10.6 g) and 2,2,2-trifluoroethanol (12.0 g) were dissolved in N,N-dimethylformamide (80 ml), and potassium carbonate (15.5 g) was added thereto. The mixture was stirred at 80° C. for 2 hr, and allowed to be cooled. To the reaction mixture was added ethyl acetate (100 ml), and the white precipitate was removed by filtration. The filtrate was concentrated under reduced pressure to give an orange residue. The obtained residue was again dissolved in ethyl acetate (400 ml), and the solution was washed with water and saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure to give an orange crude solid. The obtained solid was washed with a mixed solvent of 10% diethyl ether/hexane to give the title compound (15.8 g) as yellow-white needle crystals.

1. temperatureto be cooled
2. customthe white precipitate was removed by filtration
3. concentrationThe filtrate was concentrated under reduced pressure
4. customto give an orange residue
5. washthe solution was washed with water and saturated brine
6. dry with materialdried over anhydrous magnesium sulfate
7. concentrationconcentrated under reduced pressure
8. customto give an orange crude solid
9. washThe obtained solid was washed with a mixed solvent of 10% diethyl ether/hexane

ORD-Eintrag

ord-a0c27ab7f43740bb8908b74ea288d8ef

Quelldatensatz

uspto-grants-2015_05

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09023858B2