Synthesis of Substituted 3-Oxo-2,3-dihydro-1H-imidazo[1,2-a]-indol-6,7-dicarbonitriles
A three-step method for the preparation of 3-oxo-2,3-dihydro-1H-imidazo[1,2-a]indoles from substituted 2-amino 1-hydroxyindole-5,6-dicarbonitriles was developed.