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OXIDATION OF 3-ARYL-1H-BENZO[f]CHROMENES WITH KOSER'S REAGENT – SYNTHESIS OF BENZOFLAVYLIUM TOSYLATES

Виталий А. Осянин, Максим Р. Демидов, Дмитрий В. Осипов, Юрий Н. Климочкин
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Abstract


The oxidation of 3-aryl-1H-benzo[f]chromenes with Koser's reagent in methanol afforded a series of benzoflavylium tosylates. This reaction is the first example of the use of polyvalent iodine compounds to access arene-condensed pyrylium salts.

Keywords


3-aryl-1H-benzo[f]chromenes; benzoflavylium tosylates; Koser's reagent; oxidative aromatization.

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