Synthesis of 7‐Triazole‐substituted Camptothecin via Click Chemistry and Evaluation of in vitro Antitumor Activity

Camptothecin (CPT) is a natural topoisomerase I inhibitor with powerful antineoplastic activity against colorectal, breast, lung and ovarian cancers. To discover more potent antitumor agents, a series of new CPT derivatives were synthesized utilizing click chemistry. All compounds were assessed for cytotoxicity against A549, HCT‐116, HT‐29, LoVo, MDA‐MB‐231 cell lines, and some compounds exhibited good in vitro potency. Furthermore, all compounds kept or enhanced Topo I inhibition.