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A three-component synthesis of benzo[α]phenanthridines from aromatic aldehydes,cyclohexanones,and aromatic amines has been developed,which is mediated by KI/DMSO/camphorsulfonic acid to afford a variety of functionalized benzo[α]phenanthridines in satisfactory yields.The present strategy provides a biaryl motif ortho to the nitrogen atom which has the potential to be used as lig-and by further modification.With the advantages of readily available starting materials,transition-metal-free conditions,gram-scale synthesis,and broad substrate scope,this three-component protocol provides an efficient approach for the preparation of diverse benzo[α]phenanthridines.