2-Hydroxy-1-naphthaldehyde → 6-Bromo-2-hydroxy-1-naphthaldehyde

関与物質

反応手順

To a solution of 2-hydroxy-1-naphthaldehyde (60.0 g) in AcOH (300 mL) was added dropwise a solution of bromine (66.8 g) in AcOH (30 mL) over 30 min. After being stirred for 1 h, the mixture was poured into aqueous Na2S2O3 solution, and the resulting mixture was extracted with AcOEt. The combined organic layers were washed with water, 1N-NaOH, and brine followed by drying over MgSO4. After removal of the solvent in vacuo, the residue was washed with EtOH to give a yellow powder. The powder was crystallized from iPrOH to afford the title compound (28.8 g) as pale yellow needles.

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