Synthesis of artemisinin dimers using the Ugi reaction and their in vitro efficacy on breast cancer cells
2013
Wang, Shusheng | Sasaki, Tomikazu
The Ugi four-component reaction was used to prepare a series of artemisinin monomers and dimers. We found that the endoperoxide group in artemisinin remains intact during the reaction. The new artemisinin dimers showed potent anti-cancer activity against two human breast cancer cell lines, MDA-MB-231 and BT-474. One of the Ugi artemisinin dimers showed an IC₅₀ value of 12nM when tested on BT474 cells, more than 600 times more potent than artesunate. Furthermore, the same Ugi artemisinin dimer showed a low toxicity when tested on MCF10A, a nontumorigenic cell line, resulting in a selectivity index of more than 8000.
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