The interaction of carbon-centered radicals with copper(I) and copper(II) complexes
Résumé
Although alkylcopper(I) reagents are widespread, compounds containing alkyl ligands on CuII or CuIII are much less common. Such complexes, however, are generated as transient species when carbon-center radicals add to CuI or CuII complexes, respectively, and appear to be involved in several copper-catalyzed organic transformations. A few organocopper(II) and organocopper(III) complexes were found sufficiently robust to allow isolation and full characterization. This article reviews the reactivity of carbon-centered radicals with CuI and CuII ions, both in aqueous and non-aqueous environments, with focus on the importance of the resulting organocopper species on atom transfer radical polymerization and on copper-catalyzed radical termination.
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