DECARBOXYLATIVE HALOGENATION OF INDOLECARBOXYLIC ACIDS USING HYPERVALENT IODINE(III) REAGENT AND ITS APPLICATION TO THE SYNTHESIS OF POLYBROMOINDOLES

Depending on the N-protecting group of the substrate, the title reaction generally affords either 1-(phenylsulfonyl)-2,3-dihaloindoles or 1-methyl-3,3-dihalooxindoles.