Synthesis of 3-iodo derivatives of flavones, thioflavones and thiochromones

Article abstract of DOI:10.1055/s-1993-25904

The title compounds, 2-aryl-3-iodo-4H-1-benzopyrans and 2-alkyl or 2-aryl-3-iodo-4H-1-benzothiopyrans, were prepared by reaction of the corresponding heterocyclic derivatives with the iodine-cerium(IV) ammonium nitrate system under mild conditions. The scope and proposed mechanism of the reaction were also demonstrated.