Benzimidazole-based analogues of epothilones containing a cyclopropane ring in place of the natural epoxide moiety have been prepared based on the selective cyclopropanation of homoallylic alcohol intermediates as one of the key steps. In contrast to the epoxide-containing parent compounds the cyclopropane analogues are not or only minimally susceptible to P-gp170-mediated drug efflux.
Natural Products as Leads for Anticancer Drug Discovery: Discovery of New Chemotypes of Microtubule Stabilizers through Reengineering of the Epothilone Scaffold
作者:Karl-Heinz Altmann、Frédéric Cachoux、Fabian Feyen、Jürg Gertsch、Christian N. Kuzniewski、Markus Wartmann
DOI:10.2533/chimia.2010.8
日期:——
the collection of epothilone analogs that have been (or still are) investigated clinically is rather limited and their individual structures show little divergence from the original natural product leads. In contrast, we have elaborated a series of epothilone-derived macro-lactones, whose overall structural features significantly deviate from those of the natural epothilonescaffold and thus define new