Substrate‐Induced Synthesis of Coumarin‐Fused Quinolinones from Anilines, 4‐Hydroxycoumarins and DMSO under Air

Abstract Substrate‐induced synthesis of 6 H ‐Chromeno[4,3‐ b ]quinolin‐6‐ones has been developed directly from anilines, 4‐hydroxycoumarins and DMSO under air without any catalysts and additives in one pot. This protocol highlights dual roles of 4‐hydroxycoumarins which were not only used as reactants but also activated DMSO to provide one‐carbon unit in the desired products. magnified image