Total Synthesis of an Epothilone Analogue based on the Amide‒Triazole Bioisosterism.

Epothilones are 16-membered macrolides that can act as microtubule-targeting agents to tackle cancer. Many synthetic analogues have been investigated for their activity, yet often based on macrolide structures. A notable exception is Ixabepilone, an azalide representing the only epothilone-like molecule approved by the FDA as a chemotherapeutic. Exploiting the amide-triazole bioisosterism, in this work we report the synthesis of the first generation of epothilones lacking the macrolide or azalide structure, with the ester or amide linkage replaced by a triazole unit. Together with the synthesis of this new analogue, computational and biological evaluations have been performed too.

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