反应详情

To a mixture of benzyl 3-(1-(6-bromo-1H-indol-3-yl)-2-nitroethyl)-2-methylphenylcarbamate (3.00 g, 5.90 mmol) and ammonium chloride (4.42 g, 83 mmol) in methanol (100 mL) and tetrahydrofuran (100 mL) at 0° C. was added zinc dust (5.40 g, 83 mmol) in one portion. The mixture was stirred at room temperature for 7 hr, then diluted with ethyl acetate (100 mL) and filtered through CELITE®. The filtrate was concentrated under vacuum. To the residue was added water (60 mL), and the mixture was extracted with ethyl acetate (4×80 mL). The combined extract was washed with brine (60 mL) and dried over anhydrous MgSO4. Removal of solvent under vacuum provided the desired product (2.82 g, 5.89 mmol, 100% yield) as a beige solid.

1. filtrationfiltered through CELITE®
2. concentrationThe filtrate was concentrated under vacuum
3. additionTo the residue was added water (60 mL)
4. extractionthe mixture was extracted with ethyl acetate (4×80 mL)
5. extractionThe combined extract
6. washwas washed with brine (60 mL)
7. dry with materialdried over anhydrous MgSO4
8. customRemoval of solvent under vacuum