Water → 1-(5-amino-2-chlorophenyl)ethanone

Temperature

70 °C

2.01 g (10.1 mmol) of 1-(2-chloro-5-nitro-phenyl)-ethanone, 2.54 g (47.5 mmol) of ammonium chloride and 1.99 g (35.7 mmol) of iron powder were added to a mixture of 6 mL of water and 12 mL of methanol. The slurry was stirred at 70° C. for 1 h, and then cooled down, filtered through a pad of celite and concentrated down under reduced pressure. The residue was taken up in 60 mL ethyl acetate and 60 mL of water. The aqueous layer was extracted with 40 mL of ethyl acetate and the combined organic layers were evaporated under reduced pressure. The residue was filtered through a pad of silica gel eluting with a 7:3 mixture of ethyl acetate-hexanes to give 1.6 g (94%) of the pure product as a white solid. LC-MSD, m/z for C8H8ClNO [M+H]+=170.0, 172.0;

1. temperaturecooled down
2. filtrationfiltered through a pad of celite
3. concentrationconcentrated down under reduced pressure
4. extractionThe aqueous layer was extracted with 40 mL of ethyl acetate
5. customthe combined organic layers were evaporated under reduced pressure
6. filtrationThe residue was filtered through a pad of silica gel eluting with a 7:3 mixture of ethyl acetate-hexanes

ORD record

ord-856a8bc0a85649c4a12cda5eeeca8fea

Source dataset

uspto-grants-2013_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08519135B2