Access to Unsymmetrical 1,2-Diketone Intermediates via Benzeneseleninic Anhydride-Promoted Oxidation: Application to Indolone-N-Oxide Synthesis

Abstract
1,2-Dicarbonyl compounds employed as key-intermediates in indolone-N-oxide synthesis were prepared by direct oxidation of aryl, aryl- and aryl, alkyl-substituted alkenes assisted by benzeneseleninic anhydride.