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A novel and efficient synthesis of sulfur-containing heterocycles from phenol ethers bearing an alkyl sulfide sidechain using a combined reagent of a hypervalent iodine(u1) species and BF3.Et20 is described.

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A Novel and Direct α-Azidation of Cyclic Sulfides Using a Hypervalent Iodine(III) Reagent.-A novel and direct method for the α-azidation of mono-and bicyclic sulfides using a combination of iodosylbenzenetrimethylsilyl azide is described. The method is even applicable to substrates which are easily aromatized under oxidative conditions.-(TOHMA, H.; EGI, M.; OHTSUBO, M.; WATANABE, H.; TAKIZAWA, S.; KITA, Y.; Chem.