μ-[3-4-η-(1-Alken-3-yne) hexacarbonyldicobalt complexes: Radical cyclocondensation mediated by manganese (III) acetate

…, O Vostrowsky, W Bauer, HJ Bestmann

Index: Melikyan, Gagik G.; Vostrowsky, Otto; Bauer, Walter; Bestmann, Hans Juergen Journal of Organometallic Chemistry, 1992 , vol. 423, # 1 p. C24 - C27

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Citation Number: 21

Abstract

Abstract A regioselective pathway for the radical reaction of 1-alken-3-ynes with β- dicarbonyl compounds, mediated by Mn (OAc) 3, can be achieved by protection of the substrate triple bond with a hexacarbonyldicobalt moiety. Dihydrofuran and hexahydrobenzofuran derivatives are formed by intermolecular oxidative cyclization of intermediate cobalt-complexed propargyl radicals.