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Synthesis and Antiproliferative Activity of Novel 1,2,3-Triazole-Sulfonamide Hybrids

Nine novel 1-(4′-sulfamoylphenyl)-1,2,3-triazole derivatives bearing an N-heterocycle moiety were designed using a molecular hybridisation approach and synthesised by alkyne/azide click chemistry. Most of the synthesised compounds exhibited good to moderate antiproliferative activity (IC50 values 3.7 to 77.1 μM) against stomach, oesophagus and prostate cancer cell lines, but a compound containing an S-(2-pyridyl)thiomethyl moiety showed 10-fold greater activity against the stomach cell line than 5-fluorouracil. These results demonstrate that N-heterocycle-1,2,3-triazolylsulfonamides could be promising lead compounds to develop new antitumour drugs.