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.
基于高
烯丙醇中间体的选择性
环丙烷化作为关键步骤之一,已经制备了含有
环丙烷环代替天然
环氧化物部分的基于
苯并咪唑的埃坡霉素类似物。与含
环氧化物的母体化合物相反,
环丙烷类似物对P-gp170介导的药物流出不敏感或仅极少敏感。