Synthesis of spiro[indoline-3,4′-pyrrolo[1,2-a]quinoxalin]-2-one catalyzed by molecular iodine

Molecular iodine catalyzed preparation of spiro[indoline-3,4'-pyrrolo[1,2-a]quinoxalin]-2-one. This reaction between N-(2-aminophenyl)pyrrole and isatins proceeds in CH3CN at room temperature in good to excellent yields. (C) 2013 Elsevier Ltd. All rights reserved.