Design, Synthesis, and Biological Evaluation of Novel C14−C3′BzN-Linked Macrocyclic Taxoids
作者:Liang Sun、Xudong Geng、Raphaël Geney、Yuan Li、Carlos Simmerling、Zhong Li、Joseph W. Lauher、Shujun Xia、Susan B. Horwitz、Jean M. Veith、Paula Pera、Ralph J. Bernacki、Iwao Ojima
DOI:10.1021/jo801713q
日期:2008.12.19
and 16-membered macrocyclic taxoids. However, the RCM reaction to form the designed 14-membered macrocyclic taxoid did not proceed as planned. Instead, the attempted RCM reaction led to the occurrence of an unprecedented novel Ru-catalyzed diene-coupling process, giving the corresponding 15-membered macrocyclic taxoid (SB-T-2054). The biological activities of the novel macrocyclic taxoids were evaluated
新型大环紫杉醇同源物被设计为模仿紫杉醇的生物活性构象。对“ REDOR-Taxol”结构的计算分析表明,该结构可以通过连接浆果赤霉素部分的C14位置和C3'N-苯甲酰基(C3'BzN)的邻位而刚性化。距离7.5 A,带有短连接子(4-6个原子)。选择7-TES-14β-烯丙氧基浆果赤霉素III和(3R,4S)-1-(2-链烯基苯甲酰基)-β-内酰胺作为关键组分,Ojima-Holton偶联提供相应的紫杉醇-二烯。紫杉醇-二烯的Ru催化的闭环复分解(RCM)提供了设计的15和16元大环类紫杉醇。但是,RCM反应形成设计的14元大环类紫杉烷类药物并没有按计划进行。反而,尝试的RCM反应导致发生前所未有的新型Ru催化的二烯偶联过程,从而得到相应的15元大环紫杉烷类化合物(SB-T-2054)。通过肿瘤细胞生长抑制(即细胞毒性)和微管蛋白聚合测定法评估了新型大环类紫杉醇的生物学活性。这些测定揭示了