Iodine → 4-Bromo-3-oxo-n-phenylbutanamide

関与物質

反応手順

Under a nitrogen atmosphere, a solution of bromine (1.16 ml, 22.59 mmol) in 17 ml of acetic acid containing a small crystal of iodine was added over 2.5 hours to a solution of acetoacetanilide (4.0 g, 22.57 mmol) in 12 ml of acetic acid, at room temperature (cooling with cold water). The reaction mixture was stirred at room temperature for 3 hours, then poured into 100 ml of ice-cold water and the crude solid product was filtered off. Following crystallization from ethanol, 3.30 g of 4-bromoacetoacetanilide were obtained, m.p 130°-132° C.

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