Acyliminium ion cyclisations to pyrrolo- and pyrido-[1,2-f]phenanthridine and benzo[de]pyrrolo[2,1-a]isoquinoline ring systems
Abstract
Pyrrolo- and pyrido-[1,2-f]phenanthridines and benzo[de]pyrrolo[2,1-a]isoquinolines are obtained by acid-catalysed cyclodehydration of appropriate hydroxy lactams and keto amides derived from N-substituted succinimide and glutarimide derivatives.