Zn(OAc)(2)-Catalyzed C3-Carbonylacetylation of Indoles with alpha-Diazoketones Involving Wolff Rearrangement

Zn(OAc)(2)-catalyzed highly regioselective carbonylacetylation of indoles and pyrroles with alpha-diazoketones has been developed. This transformation involves a combination of Wolff rearrangement/cross-coupling relay and provides an efficient approach to versatile 3-carbonylacetylindoles and 2-carbonylacetylpyrroles with a broad range of functional group tolerance.