反应详情

To a solution of 5-(2,6-dichloro-4-nitro-phenoxy)-2-methoxy-benzenesulfonyl chloride (4.26 g, 10.3 mmol) in water (40 mL) was added sodium sulfite (3.89 g, 30.9 mmol) and sodium bicarbonate (5.19 g, 61.8 mmol). The resulting mixture was heated to reflux for 2 h and then cooled to RT. The solution was acidified with conc. HCl (5 mL) followed by addition of water (40 mL). The aqueous solution was extracted with EtOAc (5×80 mL). The combined organic extracts were washed with brine (2×50 mL), dried and concentrated to give the title compound of Step B (2.56 g) as a solid. The title product of Step B was used in the next step without purification. MS (APCl−) Calc.: 376.9. Found: 375.8 (M−1).

1. temperatureThe resulting mixture was heated
2. temperatureto reflux for 2 h
3. extractionThe aqueous solution was extracted with EtOAc (5×80 mL)
4. washThe combined organic extracts were washed with brine (2×50 mL)
5. customdried
6. concentrationconcentrated