Synthesis and biological evaluation of camptothecin substituted norcantharimide derivatives

In this paper, a series of novel derivatives of camptothecin substituted norcantharimide was designed by mimic strategy. These compounds were synthesized in moderate yields by directly coupling CPT with N-amino acid norcantharimides. Their cytotoxicity to four human tumour cell lines (HepG2, BGC-803, SW480 and PANC-1) and normal human cell lines L-O2 and HIEC was evaluated. The synthesized CPT substituted norcantharimide analogs (3g and 3f) showed better anti-hepatocarcinoma activity than CPT. Compounds 3d, 3e, 3g, 3h and 3i also showed strong inhibition activity against BGC803.