作者:Kazuo Komano、Satoshi Shimamura、Masayuki Inoue、Masahiro Hirama
DOI:10.1021/ja076671f
日期:2007.11.1
structure. In this paper, we report the first total synthesis of the aglycon 1 of the chromophore. The bicyclo[7.3.0]enediyne core with the exo-C4,13-Z-olefin and the 15-membered ansa-macrolactam with the non-biaryl atropisomerism are unique structural features that made this synthesis particularly challenging. The key reactions used in the described synthesis were cerium amide promoted nine-membered ring
Maduropeptin 由载体蛋白和发色团的 1:1 复合物组成。maduropeptin 发色团通过与结构相关的天然烯二炔不同的机制表现出有效的抗肿瘤和抗菌活性。九元烯二炔在 C14-酰胺氮亲核攻击后形成,然后自发环芳化形成对苄双自由基,它可以通过夺氢有效地切割双链 DNA。因此,生色团代表高反应性烯二炔结构的稳定前药形式。在本文中,我们报告了发色团的苷元 1 的首次全合成。双环[7.3.0]烯二炔核与外-C4,13-Z-烯烃和具有非联芳阻转异构现象的 15 元长链内酰胺是独特的结构特征,使这种合成特别具有挑战性。所述合成中使用的关键反应是酰胺铈促进九元环的形成、一锅法大环内酰胺的形成...