Abstract:A potentially viable route for the synthesis of 3‐substituted indoles is presented herein. The methodology is based on a regioselective Rh‐catalysed hydroformylation of prepared 2‐alkyn‐1‐ylanilines. The requisite 2‐alkynylaniline substrates were prepared in high yields (>85 %) using the Pd‐catalysed Sonogashira reaction. A catalyst complex that comprises RhI(CO)(PPh3)3 and 1,2‐bis(diphenylphosphino)ethane as the ligand allowed the quantitative conversions of the alkynyl substrates with selectivities >75 % for… Show more
A novel palladium-catalyzed nucleomethylation of alkynes is developed, affording 3-methylindoles, 3-methylbenzofurans and 4-methylisoquinolines in moderate to excellent yields.
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