N-{4-chloro-2-fluoro-5-[(5-nitropyridin-2-yl)oxy]phenyl}-2,2,2-trifluoroacetamide → N-{5-[(5-aminopyridin-2-yl)oxy]-4-chloro-2-fluorophenyl}-2,2,2-trifluoroacetamide

Temperatur

60 °C

A mixture of N-{4-chloro-2-fluoro-5-[(5-nitropyridin-2-yl)oxy]phenyl}-2,2,2-trifluoroacetamide (600 mg, 1.58 mmol), reduced iron (452 mg, 8.09 mmol) and acetic acid (10 mL) was stirred at 60° C. for 1.5 hr. The reaction mixture was filtered through celite, and the filtrate was concentrated under reduced pressure. The residue was dissolved in ethyl acetate (20 mL), washed with saturated aqueous sodium hydrogen carbonate solution (10 mL) and saturated brine (10 mL), dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=80/20→34/66) to give the title compound (357 mg, 65%) as a white powder.

1. filtrationThe reaction mixture was filtered through celite
2. concentrationthe filtrate was concentrated under reduced pressure
3. dissolutionThe residue was dissolved in ethyl acetate (20 mL)
4. washwashed with saturated aqueous sodium hydrogen carbonate solution (10 mL) and saturated brine (10 mL)
5. dry with materialdried over anhydrous magnesium sulfate
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by silica gel column chromatography (hexane/ethyl acetate=80/20→34/66)

ORD-Eintrag

ord-95518fe692f844e19228643dcfd4bc27

Quelldatensatz

uspto-grants-2013_01

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08344135B2