On the exclusion of radical species in the ligand coupling reactions with pentavalent triarylbismuth derivatives

Article abstract of DOI:10.1016/S0040-4020(98)01148-X

The presence of aryl radical species in the course of arylation reactions with tri and pentavalent organobismuth compounds has been studied by the use of an internal-trap containing reagent: tris(2- allyloxyphenyl)bismuth and its diacetate. The intervention of radical species can be excluded in C- and O-arylation under basic conditions as well as in copper catalyzed O- and N-arylation, as cyclized products were never detected in any of these reactions.