One-Pot, Three-Component Assembly of Indoloquinolines: Total Synthesis of Isocryptolepine

Indolo­[3,2-c]­quinolones have been efficiently synthesized via an acid-mediated, one-pot, three-component condensation of arylhydrazines, o-aminoacetophenones, and triazines or nitriles. The synthetic application of this method is showcased by the concise synthesis of isocryptolepine alkaloid and a series of its synthetic analogues with demonstrated cancer cell antiproliferative activities.