反应详情

Acetyl chloride (0.018 ml) was added to an ice-cooled solution of N-[2-amino-4-(phenylsulphonyl)phenyl]-2-hydroxy-2-methyl-3,3,3-trifluoropropanamide (Example 184) (0.097 g) in pyridine (1 ml) and the solution was allowed to warm up to ambient temperature over 2 hours. Water was added and the mixture was extracted with ethyl acetate. The organic extracts were combined, washed with brine and dried. Volatile material was removed by evaporation and the residue was purified by chromatography on a silica gel Mega Bond Elut column eluting with 10-40% ethyl acetate/hexane to give the title compound (0.89 g) as a solid. Mp 205-207° C.; NMR: 1.5 (s, 3H), 2.1 (s, 3H), 7.57-7.75 (m, 4H), 7.8-7.9 (m, 2H), 7.9-8.05 (m, 3H), 9.8 (brs, 1H), 10.1 (brs, 1H); MS (ESP−): 429.

1. extractionthe mixture was extracted with ethyl acetate
2. washwashed with brine
3. customdried
4. customVolatile material was removed by evaporation
5. customthe residue was purified by chromatography on a silica gel Mega Bond Elut column
6. washeluting with 10-40% ethyl acetate/hexane