反应详情

To a solution of methyl [4-(aminosulfonyl)]benzoate (5.8 g, 27 mmol) (Step 2) in THF (400 ml), methanol (1.6 ml, 40 mmol) and lithium borohydride (20 ml, 2M solution in THF, 42 mmol) were added over 10 minutes. After heating at reflux for 3.5 hours, the reaction mixture was cooled and poured over ice containing 1N HCl (80 ml). The reaction mixture was extracted with ethyl acetate, dried (Na2SO4), filtered and concentrated. The crude mixture was purified by chromatography (silica gel, hexane/ethyl acetate, 1/1) to give 4-(hydroxymethyl)benzenesulfonamide (3.8 g, 75%) as a white solid.

1. temperatureAfter heating
2. temperatureat reflux for 3.5 hours
3. temperaturethe reaction mixture was cooled
4. extractionThe reaction mixture was extracted with ethyl acetate
5. dry with materialdried (Na2SO4)
6. filtrationfiltered
7. concentrationconcentrated
8. customThe crude mixture was purified by chromatography (silica gel, hexane/ethyl acetate, 1/1)