Chloral alcoholate → N-(4-bromo-2-methoxyphenyl)-2-(hydroxyimino)acetamide

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Hydroxylamine hydrochloride (6.67 g, 96 mmol) in water (15 mL) was added to a suspension of 2,2,2-trichloro-1-ethoxyethanol (6.96 g, 36 mmol) and sodium sulfate (38.3 g, 270 mmol) in water (45 mL) and 2N HCl (30 mL). The mixture was stirred at 60° C. for 20 min. 4-Bromo-2-methoxybenzenamine (6.06 g, 30 mol) in 2N HCl (30 mL) was added, and the mixture was heated to 90° C. for 2 h. The mixture was cooled to room temperature. The solid was collected by filtration, washed with water, and air dried to afford the title compound (5.55 g, crude, 68% yield). This material was used in the next step without further purification. MS (ESI) m/e [M+1]+ 273, 275.

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