Potassium Iodide → 5-Bromo-2-hydroxy-3-iodobenzaldehyde

Participants

Reaction Conditions

Reaction Steps

To a solution of 5-bromosalicylaldehyde (20.0 g, 0.1 mole) and potassium iodide (17 g, 0.1 mole) in acetonitrile (150 mL) and water (50 mL) in a 500 mL round bottom flask with magnetic stirrer was added 10 chloramine T (23 g, 0.1 mole). The mixture was allowed to react for one hour. The reaction mixture was partitioned between hydrochloric acid (10%, 200 mL) and ethyl acetate. The organic layer was dried (Na2SO4), filtered and concentrated in vacuo. To the residue was added hexanes and the reaction mixture heated to 50° C. for 15 minutes. The undissolved material was removed by filtration. The filtrate was concentrated in vacuo to leave canary yellow 3-iodo-5-bromosalicylaldehyde (26 g).

Provenance & Evidence