Cobaltocene-Induced Low-Temperature Radical Coupling Reactions in a Cobalt–Alkyne Series

…, B Rivas, S Harutyunyan, L Carlson, R Sepanian

Index: Melikyan, Gagik G.; Rivas, Bianca; Harutyunyan, Stepan; Carlson, Louis; Sepanian, Ruth Organometallics, 2012 , vol. 31, # 5 p. 1653 - 1663

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Citation Number: 12

Abstract

A novel method for the low-temperature generation of Co2 (CO) 6-complexed propargyl radicals is developed. It consists of an in situ preparation of the respective cationic species (− 50 to− 10° C) and their rapid reduction with cobaltocene, Cp2Co, at− 50° C. The optimized experimental protocol is applied to both inter-and intramolecular reactions, affording topologically diverse α-aryl and α-napthyl, d, l-and meso-1, 5-hexadiynes and 1, ...