Dr. Guillaume Revol, Terry McCallum, Mathieu Morin, Dr. Fabien Gagosz and Prof. Louis Barriault Photoredox Transformations with Dimeric Gold Complexes Angewandte Chemie International Edition 52
Let the sunshine in! Unactivated alkyl and aryl bromides underwent a light-enabled reductive radical cyclization in the presence of a dimeric phosphine–gold complex as a photocatalyst (see scheme; X=C(CO2Et)2, NR, O). Sunlight can be used as the energy source for this simple and efficient radical reaction, which does not require potentially hazardous and toxic chemical reagents, such as organostannanes and chemical initiators.
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