2-Chloro-5-nitropyridine → 2,2,2-trifluoro-N-{2-fluoro-5-[methyl(5-nitropyridin-2-yl)amino]phenyl}acetamide

A solution of 2-chloro-5-nitropyridine (201 mg, 1.27 mmol) and 2,2,2-trifluoro-N-[2-fluoro-5-(methylamino)phenyl]acetamide (300 mg, 1.27 mmol) in N,N-dimethylformamide (1.5 mL) was stirred at 140° C. for 22 hr. The reaction mixture was cooled to room temperature, and suspended in ethyl acetate (5 mL), and the suspension was washed with saturated aqueous sodium hydrogen carbonate solution (5 mL) and saturated brine (5 mL), and dried over anhydrous sodium sulfate. The insoluble material was filtered off, and the filtrate was concentrated under reduced pressure, and the obtained residue was crystallized from ethyl acetate/hexane to give the title compound (221 mg, 49%) as yellow crystals.

1. washthe suspension was washed with saturated aqueous sodium hydrogen carbonate solution (5 mL) and saturated brine (5 mL)
2. dry with materialdried over anhydrous sodium sulfate
3. filtrationThe insoluble material was filtered off
4. concentrationthe filtrate was concentrated under reduced pressure
5. customthe obtained residue was crystallized from ethyl acetate/hexane

ORD record

ord-003e2aa1782f4b33895abed5d9c0ec2e

Source dataset

uspto-grants-2013_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08344135B2