Novel camptothecin derivatives having antitumor activity, the processes for the preparation thereof, the use thereof as antitumor drugs and pharmaceutical compositions containing them.
具有抗肿瘤活性的新型紫杉醇衍生物,其制备方法,作为抗肿瘤药物的用途以及含有它们的药物组合物。
Semisynthesis, Biological Activity, and Molecular Modeling Studies of C-Ring-Modified Camptothecins
The synthesis, biological activity, and molecular modeling studies of C-ring-rnodified camptothecins are reported. A general synthetic protocol, based on "C-5 camptothecin (C-5-CPT) enolate chemistry", allows one to obtain various C5-substituted analogues. All new Compounds, obtained as 1:1 epimeric mixtures, were tested for their antiproliferative activity. Experimental data showed that all novel derivatives are less active than the reference compounds and that one of the two epimers; is more active than the other. Molecular docking simulations were performed to achieve more insight into the interactions between the new C5-modified CPTs and Topo I. A good correlation was observed when the data of cytotoxicity and the values calculated for the free binding energy were combined.