NMR Spectroscopic Evidence for π-Complexation and the Formation of a Vinylcopper Intermediate in the Reaction between Methyl phenylpropiolate and tBuCu(CN)Li
Amidocuprates, derived from organocopperreagents and lithium amides upon exposure to oxygen at low temperature, provide new amine derivatives in satisfactory yields. Details of this flexible and simple methodology are given. The reaction mechanism is analyzed in terms of an oxidative intramolecular coupling of aminyl radicals with the ligands on Cu in the intermediate amidocuprate. This reaction is