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OXIDATIVE REARRANGEMENT OF 3-ARYL-1H-BENZO[f]CHROMENES INTO 2-AROYL-1,2-DIHYDRONAPHTHO[2,1-b]FURANS

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


By the reaction of 3-aryl-1H-benzo[f]chromenes with N-bromosuccinimide in aqueous acetone, a series of 2-aroyl-1,2-dihydronaphtho[2,1-b]furans unsubstituted at the C-1 position were obtained as a result of formal addition of hypobromous acid to the pyran fragment and intramolecular nucleophilic substitution. This reaction is a rare example of the ring constriction in 1H-benzo[f]chromene series.

 


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This work was supported by the Russian Science Foundation (grant 19-73-10109)

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