Zinc triflate catalyzed regioselective synthesis of pyrrolo[2,3-c] carbazoles via heteroannulation

Abstract

We explored the zinc triflate catalyzed heteroannulation reaction of 3-aminocarbazoles with substituted propargyl alcohols to form pyrrolo[2,3-c]carbazoles in moderate to good yields. This transformation proceeds with good regioselectivity and without the addition of additives or ligands. © 2012 The Royal Society of Chemistry.