An amino-benzosuberene analogue that inhibits tubulin assembly and demonstrates remarkable cytotoxicity
作者:Rajendra P. Tanpure、Clinton S. George、Madhavi Sriram、Tracy E. Strecker、Justin K. Tidmore、Ernest Hamel、Amanda K. Charlton-Sevcik、David J. Chaplin、Mary Lynn Trawick、Kevin G. Pinney
DOI:10.1039/c2md00318j
日期:——
The recent discovery of a small-molecule benzosuberene-based phenol that demonstrates remarkable picomolar cytotoxicity against selected human cancer cell lines and strongly inhibits tubulin polymerization (1–2 μM) inspired the design and synthesis of a variety of new, structurally diverse benzosuberene derivatives. An efficient synthetic route to functionalized benzosuberenes was developed. This methodology utilized a Wittig reaction, followed by a selective alkene reduction and ring-closing cyclization to form the core benzosuberone structure. This synthetic route facilitated the preparation of a 4-nitro-1-(3′,4′,5′-trimethoxyphenyl) benzosuberene derivative and its corresponding 4-amino analogue in good yield. The 4-amino analogue was a strong inhibitor of tubulin polymerization (1.2 μM), demonstrated enhanced cytotoxicity against the human cancer cell lines examined (GI50 = 33 pM against SK-OV-3 ovarian cancer, for example), and exhibited a concentration dependent disruption of a pre-established capillary-like network of tubules formed from human umbilical vein endothelial cells.
最近发现了一种基于小分子苯并苏烯的苯酚,它对选定的人类癌细胞系表现出卓越的皮摩尔细胞毒性,并强烈抑制微管蛋白聚合(1–2 μM),这激发了设计和合成多种结构多样的新型苯并苏烯衍生物。开发了一种高效的合成功能化苯并苏烯的方法。该方法利用Wittig反应,随后进行选择性的烯烃还原和环闭合环化,形成核心的苯并苏酮结构。这种合成路线促进了4-硝基-1-(3′,4′,5′-三甲氧基苯基)苯并苏烯衍生物及其相应的4-氨基类似物的制备,产率良好。4-氨基类似物是微管蛋白聚合的强烈抑制剂(1.2 μM),对所检测的人类癌细胞系表现出增强的细胞毒性(例如,对SK-OV-3卵巢癌细胞的GI50 = 33 pM),并表现出浓度依赖性的对由人脐静脉内皮细胞形成的预先建立的类似毛细血管网络的破坏。