Copper-Catalyzed Oxidative Cyclization of 1,5-Enynes with Concomitant C–C Bond Cleavage: An Unexpected Access to 3‑Formyl-1-indenone Derivatives

Abstract

A Cu(0)/Selectfluor system-mediated oxidative cyclization of 1,5-enynes with concomitant C–C bond cleavage to access 3-formyl-1-indenone derivatives is described. Preliminary mechanistic investigations disclosed that the C–C bond cleavage involved a novel water-participated oxygen-insertion β-carbon elimination through double oxycuprations

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