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Synthesis 1993; 1993(6): 565-567
DOI: 10.1055/s-1993-25904
short paper
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Synthesis of 3-Iodo Derivatives of Flavones, Thioflavones and Thiochromones

Fang Jie Zhang* , Yu Lin Li
  • *State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, People's Republic of China
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Publication Date:
17 September 2002 (online)

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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.