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Selenium catalyzed oxidation of alkynes in aqueous media
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1  Dipartimento di Chimica e Tecnologia del Farmaco, Università degli Studi di Perugia, Via del Liceo 1, 06134 Perugia, Italy

Abstract: 3 equivalents of ammonium persulfate in a 3:1 mixture of MeCN and water slowly convert alkynes into the corresponding 1,2-dicarbonyl compounds. The oxidation rate is enhanced by the presence of diphenyl diselenide that form in situ the electrophilic PhSeOSO3H able to promote a "one pot" hydroxyselenenyilation-deselenenylation reaction.