Iodine → 2,2,2-trichloro-1-(4-iodo-1H-pyrrol-2-yl)ethan-1-one

Under a nitrogen atmosphere to a cold (0° C.) suspension of 2,2,2-Trichloro-1 (1H-pyrrol-2-yl)ethanone (21.1 g, 99.3 mmol) and silver trifluoroacetate (23.2 g, 105 mmol) in chloroform was added iodine (25.4 g, 100 mmol) portionwise over 10 minutes. The mixture was allowed to warm to room temperature and stirred for 2 hours. This was filtered through celite and washed with chloroform. The organic phase was washed sequentially with 5% Na2S2O5, water, brine, dried (MgSO4) and filtered. Evaporation and trituration with 80% hexane/ether (80 mL) gave the title compound as a white solid (25.5 g, 78% yield), mp 140° C., 1H NMR (400 MHZ, CDCl3) δ 7.2 (m, 2H), 7.4 (m, 1H), (9.5 (bs, 1H), MS m/e (M+H)+ 339.

1. filtrationThis was filtered through celite
2. washwashed with chloroform
3. washThe organic phase was washed sequentially with 5% Na2S2O5, water, brine
4. dry with materialdried (MgSO4)
5. filtrationfiltered
6. customEvaporation and trituration with 80% hexane/ether (80 mL)

ORD record

ord-f65d662105864ca98ad072bce7be7c2e

Source dataset

uspto-grants-2008_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07417047B2