• Building block for preparation of 3-functionalized indoles1 • Building block for preparation carbazoles2 • Building block for preparation of cyanoindoles3 • Reactant for preparation of trifluoromethylindoles4 • Reactant for preparation of potent antihyperlipidemic agents5 • Building block in iso-Nazarov or Nazarov cyclizations6 • Reactant for preparation of GSK-3β inhibitors7 • Building block for preparation of carboxyindoles8 • Reactant for preparation of plant growth promoters • Reactant for preparation of tryptophan derivatives9