Effect of Modification of 6-[(Aminoalkyl)amino]-7H-benzo[e]-perimidin-7-ones on Their Cytotoxic Activity Toward Sensitive and Multidrug Resistant Tumor Cell Lines. Synthesis and Biological Evaluation

Benzoperimidines, a novel group of antitumor anthracenedione analogues, are of interest due to their ability to overcome multidrug resistance of tumor cells (Stefańska, B., Dzieduszycka, M., Bontemps-Gracz, M. M., Borowski, E., Martelli, S., Supino, R., Pratesi, G., De Cesare, MA., Zunino, F., Kuśnierczyk, H., Radzikowski, Cz. J. Med. Chem. 1999 , 42, 3494). Although the structural factor essential for exhibiting this desirable property is the presence in the molecule of a fused heterocyclic ring, the cytotoxicity against resistant cells is highly influenced by the nature and location of the substituents. A series of novel synthetic derivatives, comprising monohydroxylated benzoperimidines and 2-aminobenzoperimidines, allowed the establishment of an in vitro structure–activity relationship for a panel of leukemia sensitive, as well as P-gp dependent multidrug resistance (MDR) and multidrug resistance associated protein dependent resistance (MRP) resistant cell lines. The membrane affinity for the compounds has also been determined. Derivatives of 6-[(aminoalkyl)amino]-7 H -benzo[ e ]-perimidin-7-ones were synthesized and evaluated for their cytotoxic activity toward murine and human leukemia sensitive and resistant (MDR and MRP) cell lines.