Ammonium Chloride → Benzyl 3-(2-amino-1-(6-(tetrahydrofuran-3-yloxy)-1H-indol-3-yl)ethyl)-2-methylphenylcarbamate

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Reaction Steps

A mixture of benzyl 2-methyl-3-(2-nitro-1-(6-(tetrahydrofuran-3-yloxy)-1H-indol-3-yl)ethyl)phenylcarbamate (0.720 g, 1.397 mmol), ammonium chloride (1.121 g, 20.95 mmol), and zinc dust (1.370 g, 20.95 mmol) in tetrahydrofuran (35 mL) and methanol (35 mL) was stirred at room temperature for 4.5 hr. The mixture was diluted with ethyl acetate (40 mL) and filtered through CELITE®. The filtrate was concentrated under vacuum, and the residue was diluted with water (40 mL), basified with saturated NaHCO3 solution, and extracted with ethyl acetate (4×40 mL). The combined extract was washed with brine (40 mL) and dried over anhydrous MgSO4. Removal of solvent under vacuum provided the desired product (0.678 g, 1.396 mmol, 100% yield) as a beige solid.

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