反应详情

Iron powder (2.5 g) was added to a stirred mixture of 4-(4-acetamidophenyl-sulphonyl)-2-chloro-nitrobenzene (Method 13) (0.67 g), water (2 ml), concentrated hydrochloric acid (0.5 ml) and ethanol (10 ml). The mixture was heated under reflux for 1 hour then evaporated to near dryness and partitioned between ethyl acetate and water. The organic layer was separated the aqueous layer was extracted with ethyl acetate (3×15 ml). The organic extracts were combined 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 0-2% methanol/DCM to give the title compound (0.1 8 g) as a solid. NMR: 2.05 (s, 3H), 6.4 (s, 2H), 6.8 (d, 1H), 7.5 (d, 1H), 7.6 (d, 1H), 7.8 (q, 4H), 10.3 (brs, 1H); MS (ESP−): 323.

1. temperatureThe mixture was heated
2. temperatureunder reflux for 1 hour
3. customthen evaporated
4. custompartitioned between ethyl acetate and water
5. customThe organic layer was separated the aqueous layer
6. extractionwas extracted with ethyl acetate (3×15 ml)
7. customdried
8. customVolatile material was removed by evaporation
9. customthe residue was purified by chromatography on a silica gel Mega Bond Elut column
10. washeluting with 0-2% methanol/DCM