Bromine → 2-Bromo-2-(2-boc-amino-4-pyridyl)-1-(4-methoxyphenyl)ethanone hydrocbromide

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To a solution of 2-(2-tert-butoxycarbonylamino-4-pyridyl)-1-(4-methoxyphenyl)ethanone (0.36 g, 1.1 mmol) in acetic acid (5 mL) was added bromine (0.058 mL, 1.1 mmol) and the mixture was stirred at room temperature for 1 h. The reaction mixture was concentrated and the residue was washed with isopropyl ether to give the title compound (0.44 g, yield 82%).

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