Abstract
Twenty six new pyrazoline substituted benzenesulfonylureas (2a–z) were synthesized and tested for in vitro anticancer activity. Fourteen derivatives (2i, 2k–2p, 2r, 2s–2x) were screened for their antiproliferative activity towards 60 human cancer cell lines by the National Cancer Institute (USA). Among them four compounds (2i, 2n, 2v and 2x) exhibited significant growth inhibition and further screened at 10-fold dilutions of five different concentrations (0.01, 0.1, 1, 10 and 100μM). The compounds 2i, 2n, 2v and 2x showed effective growth inhibition (GI50 MID) values of 2.62, 3.93, 3.33, 3.74μM respectively beside cytostatic activity TGI (MG-MID) values of 8.42, 65.80, 24.00 and 36.06μM respectively. The compound 2i displayed remarkable antiproliferative activity in 8 different cell lines with GI50 less than 2μM. Compounds 2n, 2v and 2x also displayed good antiproliferative activity against 11, 18 and 14 different cell lines respectively with GI50 less than 3μM.
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