Synthesis and evaluation of tricyclic derivatives containing a non-aromatic amide as poly(ADP-ribose)polymerase-1 (PARP-1) inhibitors

Abstract

A series of potent tricyclic derivatives with a non-aromatic amide as potent PARP-1 inhibitors were successfully synthesized and their PARP-1 inhibitory activity was evaluated. Among the derivatives, 2-(1-propylpiperidin- 4-yloxy)-7,8,9,10-tetrahydrophenanthridin-6(5H)-one 23c displayed potent activity in a PARP-1 enzymatic assay and cell-based assay (IC50 = 0.142 μM, ED50 = 0.90 μM) with good water solubility. Further, molecular modeling studies confirmed the obtained biological results.