[EN] COMPOUNDS, CONJUGATES, AND COMPOSITIONS OF EPIPOLYTHIODIKETOPIPERAZINES AND POLYTHIODIKETOPIPERAZINES AND USES THEREOF [FR] COMPOSÉS, CONJUGUÉS ET COMPOSITIONS D'ÉPIPOLYTHIODICÉTOPIPÉRAZINES ET DE POLYTHIODICÉTOPIPÉRAZINES ET LEURS UTILISATIONS
真菌代谢物 (+)-11,11'-双脱氧轮枝菌素 A 是一种从海洋青霉属植物中分离出的细胞毒性生物碱,属于一个迷人的功能化、立体化学复杂和复杂的二聚体桥二硫二酮哌嗪天然产物家族。尽管二聚体桥二硫二酮哌嗪类化合物已为人所知近 4 年,但没有一种能够完全合成。我们报告了 (+)-11,11'-双脱氧轮枝菌素 A 的简明对映选择性全合成,其策略受我们对该生物碱的生物合成假设的启发。开发了高度立体和化学选择性的高级四羟基化和四硫代化反应,以及在最后一步中引入桥二硫二酮哌嗪核心的温和策略,以解决这种高度敏感的亚结构。
Quantitative Modeling of Bis(pyridine)silver(I) Permanganate Oxidation of Hydantoin Derivatives: Guidelines for Predicting the Site of Oxidation in Complex Substrates
作者:Amanda J. Bischoff、Brandon M. Nelson、Zachary L. Niemeyer、Matthew S. Sigman、Mohammad Movassaghi
DOI:10.1021/jacs.7b09541
日期:2017.11.1
The bis(pyridine)silver(I) permanganate promoted hydroxylation of diketopiperazines has served as a pivotal transformation in the synthesis of complex epipolythiodiketopiperazine alkaloids. This late-stage C–H oxidation chemistry is strategically critical to access N-acyl iminium ion intermediates necessary for nucleophilic thiolation of advanced diketopiperazines en route to potent epipolythiodiketopiperazine