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A Novel Oxidation of Internal Alkynes with Hydrogen Peroxide Catalyzed by Peroxotungstophosphates

1991; Elsevier BV; Linguagem: Inglês

10.1016/s0167-2991(08)62859-1

2542-6613

Yasutaka Ishii, Yasuyuki Sakata,

Oxidative Organic Chemistry Reactions

Internal alkynes underwent a novel oxidation with aqueous hydrogen peroxide catalyzed by peroxotungstophosphates under two-phase conditions using chloroform as the solvent, affording α, β-epoxy ketones and α,β-unsaturated ketones as principal products. The epoxidation of α, β-unsaturated ketones by this catalyst oxidant system was considered to proceed by electrophilic attack of the peroxo species to the double bond.