Application： 5,6-Dimethoxyindole was used in the synthesis of N-benzyl-N-cyclopropyl-5,6-dimethoxyindole-3-glyoxalamide. Reactant in synthesis of indolylhydroxyoxindoles via enantioselective Friedel-Crafts reaction Reactant in synthesis of benzyl trimethoxyindoles Reactant for synthesis of benzoylpiperazinyl-indolyl ethane dione derivatives as HIV-1 inhibitors Reactant for synthesis of 1-aroylindole 3-aroylindoles combretastatin A-4 analogs as antitumor agents and tubulin polymerization inhibitors Reactant for preparation of tryptophanol derivatives via the Grignard reaction