Reaction of 4-hydroxycoumarin or its <i>O</i>-substituted derivatives with diatomic interhalogens: ICl and IBr

<p>Herein, we present some aspects regarding the iodination/bromination of 4-hydroxycoumarin or its <i>O</i>-methyl or <i>O</i>-acetyl derivatives with iodine monochloride or iodine monobromide as halogenation reagents. Also, the investigation of photochemical transformation of the three 3-iodocoumarins was investigated for the first time.</p