title: CoBr2(Bpy): an efficient catalyst for the direct conjugate addition of aryl halides or triflates onto activated olefins.
abstract: An efficient cobalt-catalyzed method devoted to the direct conjugate addition of functionalized aryl compounds onto Michael acceptors is described. The CoBr2(2,2'-bipyridine) complex appears to be an extremely suitable catalyst for the activation of a variety of aromatic reagents ranging from halides to triflates functionalized by reactive groups. This procedure allows for the synthesis of compounds resulting from 1,4-addition in good to excellent yields. The versatility of this original process represents a simple alternative to most known methods using organometallic reagents.
authors.affiliation: Laboratoire d'Electrochimie, Catalyse et Synthèse Organique, UMR 7582, Université Paris 12-C.N.R.S. 2, rue Henri Dunant, 94320 Thiais, France.
authors.forename: Muriel
authors.initials: M
authors.lastname: Amatore
authors.forename: Corinne
authors.initials: C
authors.lastname: Gosmini
authors.forename: Jacques
authors.initials: J
authors.lastname: Périchon