A structure–activity relationship study on multi-heterocyclic molecules: two linked thiazoles are required for cytotoxic activity
作者:Seong Jong Kim、Chun-Chieh Lin、Chung-Mao Pan、Dimple P. Rananaware、Deborah M. Ramsey、Shelli R. McAlpine
DOI:10.1039/c2md20291c
日期:——
We report the synthesis, cytotoxicity, and phenotypic analysis of oxazole and thiazole containing fragments. Evaluating the optimal size and heterocycle for growth inhibition and apoptosis showed that activity required at least two thiazoles sequentially connected. This is the first detailed comparison of biological activity between multi-heterocyclic containing fragments.
Total Synthesis and Biological Activity of Natural Product Urukthapelstatin A
作者:Chun-Chieh Lin、Worawan Tantisantisom、Shelli R. McAlpine
DOI:10.1021/ol401412v
日期:2013.7.19
Herein we report the first total synthesis of the natural product Urkuthaplestatin A (Ustat A) utilizing a convergent synthetic strategy. The characterization and biological activity match those of the previously published natural product. Interestingly, several intermediates, including the linear and serine cyclized precursors, show a 100-fold decrease in cytotoxicity, with IC50's in the low micromolar range. These data indicate that the rigidity and the consecutive aromatic heterocyclic system are responsible for the biological activity.