Tetrahedron

Electron transfer oxidation of enol derivatives of 2, 3-dihydrobenzopyran-4-ones

MC Jiménez, MA Miranda, J Soto, R Tormos

Index: Jimenez, M. Consuelo; Miranda, Miguel A.; Soto, Juan; Tormos, Rosa Tetrahedron, 1994 , vol. 50, # 25 p. 7635 - 7644

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Citation Number: 3

Abstract

Dihydrobenzopyrones 1a-c and their enol acetates 3a-e have been submitted to oxidation under single electron transfer (SET) conditions, using three alternative ways of activation: chemical oxidation with cerium (IV) ammonium nitrate (CAN), photochemical oxidation using triphenylpyrylium tetrafluoroborate (TPT) as sensitizer or electrochemical oxidation. The most significant products obtained are diketones 4, hydroxyketones 5, rearranged ...