Synthesis and antitumor activity of substituted succinamides using a potato disc tumor induction assay

In view of potential biological activities of some succinic acid derivatives, we synthesized some novel N-[4-(4-morpholinosulfonyl)-phenyl]-succinamides (6a, c; 7a, c) and N-[4-(benzylaminosulfonyl) phenyl]-succinamides (6b, d; 7b, d) derivatives as antitumor agents. The antitumor activity of compounds was studied using the potato disk bioassay technique. Vincristine at 0.25 mg/ml was employed as positive control and caused -67.24% inhibitions. Compound 7b at 1 mg/ml caused -80.50% tumor inhibitions with highest activity among compounds tested.