The reaction mixture was filtrated using Celite cake before the filtrate was concentrated under reduced pressure. The residue was partitioned between Et2O (10 mL) and water (10 mL). The aqueous phase was extracted thrice with Et2O (10 mL), and the combined organic phases were washed with brine (10 mL), dried with anhydrous Na2SO4, filtered and concentrated under reduced pressure to yield the amines without further purification. and hydroxylammonium chloride (1.2 equiv.) in ethanol (30 mL) was stirred for 1h at rt.