Smenamides are an intriguing class of peptide/polyketide molecules of marine origin showing antiproliferative activity against lung cancer Calu-1 cells at nanomolar concentrations through a clear pro-apoptotic mechanism. To probe the role of the activity-determining structural features, the 16-epi-analogue of smenamide A and eight simplified analogues in the 16-epi series were prepared using a flexible synthetic route. The synthetic analogues were tested on multiple myeloma (MM) cell lines showing that the configuration at C-16 slightly affects the activity, since the 16-epi-derivative is still active at nanomolar concentrations. Interestingly, it was found that the truncated compound 8, mainly composed of the pyrrolinone terminus, was not active, while compound 13, essentially lacking the pyrrolinone moiety, was 1000-fold less active than the intact substance and was the most active among all the synthesized compounds.
斯美那
胺类是一类引人注目的海洋来源的肽/聚酮分子,通过明确的促凋亡机制在纳摩尔浓度下对肺癌Calu-1细胞显示出抗增殖活性。为了探究活性决定结构特征的作用,通过灵活的合成途径制备了斯美那胺A的16-表异构体以及16-表系列的八个简化类似物。合成的类似物在多发性骨髓瘤(MM)
细胞系中进行了测试,结果显示C-16位构型轻微影响活性,因为16-表衍
生物在纳摩尔浓度下仍然有活性。有趣的是,发现主要由
吡咯啉酮末端组成的截短化合物8没有活性,而基本上缺乏
吡咯啉酮部分的化合物13的活性比完整物质低1000倍,是所有合成化合物中最有活性的。