Jm. Cuerva et al., New synthesis of pyridoacridines based on an intramolecular aza-Diels-Alder reaction followed by an unprecedented rearrangement, CHEM COMMUN, (17), 1999, pp. 1721-1722
The synthesis of pyridoacridines related to the ascididemins can be perform
ed by an intramolecular aza-Diels-Alder cycloaddition of an alpha,beta-unsa
turated hydrazone to a quinone followed by an unprecedented rearrangement t
o yield benzo- or pyrido-[b]acridine-6,11-diones.