Toward the Creation of Induced Pluripotent Small (iPS) Molecules: Establishment of a Modular Synthetic Strategy for the Heronamide C-type Polyene Macrolactams and Their Conformational and Reactivity Analysis
8-deoxyheronamide C (2). The developed strategy enabled not only the totalsynthesis of 8-deoxyheronamide C (2) but also the unified synthesis of four heronamide-like molecules named “heronamidoids” (5–8). Conformational and reactivity analysis of the heronamidoids clarified that (1) the C19 stereochemistry mainly affected the conformation of the amide linkage, resulting in the change of alignment of two
通过合成 8-deoxyheronamide C ( 2 )建立了一种高度模块化的 Heronamide C 型多烯大环内酰胺合成策略。所开发的策略不仅能够实现 8-脱氧海洛因酰胺 C (2) 的全合成,而且能够统一合成四种名为“heronamidoids”的类海洛因酰胺分子 ( 5-8 )。Heronamidoids 的构象和反应性分析阐明:(1)C19 立体化学主要影响酰胺键的构象,导致两个多烯单元的排列发生变化和对光化学 [6π + 6π] 环加成的反应性,以及(2) C8,C9-二醇部分对于从heronamide C骨架转化为heronamide A型骨架很重要。
Synthesis of most polyene natural product motifs using just 12 building blocks and one coupling reaction
作者:Eric M. Woerly、Jahnabi Roy、Martin D. Burke
DOI:10.1038/nchem.1947
日期:2014.6
targets, most small-molecule naturalproducts are biosynthesized via iterative coupling of bifunctional building blocks. This suggests that many small molecules also possess inherent modularity commensurate with systematic building block-based construction. Supporting this hypothesis, here we report that the polyene motifs found in >75% of all known polyenenaturalproducts can be synthesized using just
多肽、寡核苷酸和寡糖的固有模块性已被用来实现通用合成平台。重要的是,与这些其他目标一样,大多数小分子天然产物是通过双功能构件的迭代耦合来生物合成的。这表明许多小分子也具有与系统的基于构建块的结构相称的固有模块化性。为了支持这一假设,我们在此报告称,>75% 的已知多烯天然产物中发现的多烯基序只需 12 个结构单元和一个偶联反应即可合成。使用相同的通用逆合成算法和反应条件,该平台能够合成覆盖所有天然产物化学空间的多种多烯框架,并首次全合成多烯天然产物阿尼吡酮 B、毒藻素 A 和神经孢黄素β- D-吡喃葡萄糖苷。总的来说,这些结果表明有可能采用更通用的方法在实验室中制造小分子。
Stereoretentive Suzuki−Miyaura Coupling of Haloallenes Enables Fully Stereocontrolled Access to (−)-Peridinin
作者:Eric M. Woerly、Alan H. Cherney、Erin K. Davis、Martin D. Burke
DOI:10.1021/ja102721p
日期:2010.5.26
motif. This new reaction was harnessed to achieve the first completely stereocontrolled total synthesis of (-)-peridinin. This synthesis was accomplished using only one reaction iteratively to assemble four fully functionalized building blocks with complete stereoretention at each initial halide or boron-bearing carbon. This synthesis elevates the capacity of the iterative cross-coupling strategy to an
申请人:The Board of Trustees of the University of Illinois
公开号:US20180305381A1
公开(公告)日:2018-10-25
The present disclosure provides tri-orthoalkylphenyl phosphine catalysts that are tuned electrically and sterically. Method of using the catalyst for cross-coupling of unactivated secondary boronic acids with near-perfect levels of site- and stereoretention are also provided.