Photo-induced synthesis of Axinastatin 3 analogs, the secondary structures and their in vitro antitumor activities
作者:Yujun Bao、Lishuang Zhao、Jingwan Wu、Shitian Jiang、Zhiqiang Wang、Yingxue Jin
DOI:10.1016/j.bmcl.2019.126730
日期:2019.11
Detailed stereochemistry study was performed by experimental electronic circular dichroism combined with theoretical calculations. Our study suggested that the cyclopeptide 1 with βI-turn presented stronger antitumor activity comparing with those without such secondary structures. Moreover, a rare ‘π helix unit’ (compound 3) was realized because of the constrained cyclic structure, which could be
环肽结合了多种有利的特性,例如良好的结合亲和力,靶标选择性和低毒性,这使其成为药物开发的诱人方式。为了确定什么构象可以解释天然和合成环肽的生物活性差异,通过光诱导单电子转移(SET)反应制备了一些结构受限的环肽阿奇他汀3类似物。通过实验性电子圆二色性结合理论计算进行了详细的立体化学研究。我们的研究表明,与没有此类二级结构的环肽1相比,具有βI转角的环肽1表现出更强的抗肿瘤活性。此外,还有一个罕见的“π螺旋单元”(化合物3)的实现是由于受约束的循环结构,可以将其视为未来研究独特螺旋二级结构的重要研究对象。