Synthesis of Eupalinilide E, a Promoter of Human Hematopoietic Stem and Progenitor Cell Expansion
作者:Trevor C. Johnson、Matthew R. Chin、Tianxu Han、John Paul Shen、Tariq Rana、Dionicio Siegel
DOI:10.1021/jacs.6b03055
日期:2016.5.11
uncover new methods to drive expansion while inhibiting differentiation. However, in the process of examining these effects, which occur through a novel mechanism, the natural product was consumed, which limited additional investigation. To provide renewed and improved access to eupalinilide E, a laboratory synthesis has been developed and is reported herein. The synthetic route can access >400 mg in a
改善造血干细胞和祖细胞 (HSPC) 的离体和体内生产有可能解决这些用于治疗各种血液疾病和紊乱的细胞的短缺问题。Eupalinilide E 促进人类 HSPC 的扩增并抑制随后的分化,从而增加临床有用细胞的数量。这种天然产物代表了一种重要工具,可以发现在抑制分化的同时推动扩张的新方法。然而,在检查通过新机制发生的这些影响的过程中,天然产物被消耗了,这限制了额外的调查。为了提供对eupalinilide E的更新和改进的获取,已经开发并在本文中报道了实验室合成。合成路线单批可达>400mg,采用在单个容器中以有用规模进行的反应。实现该方法的关键转化包括非对映选择性硼化烯炔环化和后期双烯丙基 CH 氧化,以及适应 Luche 还原和铝介导的环氧化反应,以最大限度地提高合成效率。对合成eupalinilide E 的重新测试证实了该化合物能够扩增HSPCs 并抑制分化。
Synthetic Route Development for the Laboratory Preparation of Eupalinilide E
作者:Trevor C. Johnson、Matthew R. Chin、Dionicio Siegel
DOI:10.1021/acs.joc.7b00266
日期:2017.5.5
permitted a scalable synthesis of the natural product. Two routes that failed to access eupalinilide E were triaged either as a result of providing an incorrect diastereomer or due to lack of synthetic efficiency. The successful strategy relied on late-stage allylicoxidations at two separate positions of the molecule, which significantly increased the breadth of reactions that could be used to this point
Asymmetric Total Synthesis of Eupalinilide E, a Promoter of Human HSPC Expansion
作者:Ramkrishna Maity、Saumen Hajra
DOI:10.1021/acs.orglett.2c01684
日期:2022.7.8
concise and scalable asymmetric total synthesis of eupalinilde E from (R)-(−)-carvone in 12 steps is reported with an overall yield of 20%. The key steps of the synthesis are a tandem Favorskii rearrangement–elimination reaction in the chromatography-free synthesis of carvone-derived 2-cyclopentene carbaldehyde and its catalyst-free stereospecific tandem allylboration–lactonization using recyclable trifluoroethanol
据报道,通过 12 个步骤从 ( R )-(-)-香芹酮合成 eupalinilde E 的简明且可扩展的不对称全合成,总产率为 20%。合成的关键步骤是在香芹酮衍生的 2-环戊烯甲醛的无色谱合成中的串联 Favorskii 重排-消除反应,及其使用可回收三氟乙醇作为促进剂和溶剂的无催化剂立体定向串联烯丙基硼化-内酯化反应,得到 β-羟甲基-α-亚甲基-γ-丁内酯。