Synthesis of reaction-ready 6,6′-biindole and 6,6′-biisatin via palladium(ii)-catalysed intramolecular C-H functionalisation

Abstract

The first synthesis of a 6,6′-biindole and 6,6′-biisatin scaffold is reported with the penultimate step being the formation of the di-heterocyclic ring by Pd(ii)-catalysed intramolecular C-H functionalisation and Sandmeyer cyclisation, respectively. © 2010 The Royal Society of Chemistry.