Regiospecific Synthesis of 7‐Hydroxyindoles from Pyrroles by Anionic Benzannulation

Abstract

Abstract Anionic annulation of appropriate 2,3‐disubstituted pyrroles with Michael acceptors provides an expedient route to densely substituted 7‐hydroxyindoles. Intrinsic to the methodology, the resulting substituents are disposed in a fully regiocontrolled manner. The methodology is applicable to the synthesis of 7‐hydroxybenzofurans. None of the indoles/benzofurans or pyrrole synthons synthesized in this study have hitherto been reported.