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 epothilone scaffold and thus define new
埃博洛酮是具有有效的微管稳定和抗增殖活性的细菌大环内酯类,已成功地用作发现多种临床治疗癌症候选药物的先导结构。总体而言,到目前为止,七种埃博霉素类药物已经在人体中进行了临床评估,其中一种已在2007年被FDA批准用于乳腺癌患者的临床研究。尽管有这些令人印象深刻的数字,但是,已经(或仍在)临床研究的埃博霉素类似物的集合所代表的结构多样性是相当有限的,并且它们的个体结构与原始天然产物的线索显示出很小的差异。相比之下,我们精心设计了一系列埃博霉素衍生的大内酯,其整体结构特征明显不同于天然埃博霉素支架的结构特征,因此定义了微管稳定剂的新结构家族。我们的超修饰策略的关键要素是自然环氧化物的几何形状从顺式变为反式,构象约束侧链的结合,C(3)-羟基的去除以及用氮取代C(12)。后一种修饰导致可被称为“非天然天然产物”的氮杂大环内酯。除去C(3)-羟基,并用氮取代C(12)。后一种修饰导致可被称为“非天