Palladium‐Catalyzed Hydroarylation of Homopropargyl Iodoindoles with Concurrent Alkyl and Iodonium Migrations

Abstract A selective palladium‐catalyzed C( sp ) arylation/carbocyclization/iodonium migration reaction sequence has been accomplished. Novel 2‐iodo‐1‐aryl‐9 H ‐carbazoles are now easily available. As this result is contrary to the selectivity observed using gold catalysis, the formation of 2‐iodocarbazoles is noticeable, suggesting a metal‐controlled cyclization through chemo‐ and regioselective 1,2‐alkyl migration and 1,4‐iodonium migration. magnified image