A total synthesis of phomactin AElectronic supplementary information (ESI) available: X-ray crystal structure data for the bis-epoxide 17. See http://www.rsc.org/suppdata/cc/b2/b206041h/
摘要:
描述了基于醛基乙烯基碘11的Cr(II)/Ni(II)大环化合物的phomactin A (1)的完全合成,其结果是12,然后是环氧酮16的详细描述,然后在脱保护时自发形成吡喃半缩醛。
C–C Bond Cleavage Approach to Complex Terpenoids: Development of a Unified Total Synthesis of the Phomactins
作者:Paul R. Leger、Yusuke Kuroda、Stanley Chang、Justin Jurczyk、Richmond Sarpong
DOI:10.1021/jacs.0c07316
日期:2020.9.9
from carvone. In this full account, the challenges, solutions, and intricacies of Rh(I)-catalyzed cyclobutanol C-C cleavage in a complex molecule setting is described. In addition, details of the evo-lution of strategies that ultimately led to the totalsynthesis of phomactins A, K, P, R, and T, as well as the synthesis and structural reassignment of Sch 49027, are detailed.
容易获得的碳环支架中碳-碳(CC)单键的重排可以产生独特取代的碳环,否则很难构建这种碳环。这是复杂分子合成的一种强大但通常不直观的方法。与更传统的周环和基于碳阳离子的重排相比,过渡金属介导的 CC 键裂解有可能通过提供正交选择性来扩大此类骨架重塑的范围。为了突出这一新兴技术,通过从香芹酮中获得的羟基化蒎烯衍生物的选择性CC键断裂,开发了一种统一的、不对称的、全合成的Phomactin萜类化合物。在这篇完整的叙述中,描述了复杂分子环境中 Rh(I) 催化的环丁醇 CC 裂解的挑战、解决方案和复杂性。此外,还详细介绍了最终导致 phomactins A、K、P、R 和 T 全合成以及 Sch 49027 的合成和结构重新分配的策略演变的细节。
Isolation, synthesis and bioactivity studies of phomactin terpenoids
作者:Yusuke Kuroda、Karen J. Nicacio、Ildefonso Alves da Silva-Jr、Paul R. Leger、Stanley Chang、Juliana R. Gubiani、Victor M. Deflon、Nozomu Nagashima、Alexander Rode、Katherine Blackford、Antonio G. Ferreira、Lara D. Sette、David E. Williams、Raymond J. Andersen、Sonia Jancar、Roberto G. S. Berlinck、Richmond Sarpong
DOI:10.1038/s41557-018-0084-x
日期:2018.9
(natural products) that cover their isolation, chemical synthesis and bioactivity investigation present myriad opportunities for discovery. For example, the isolation of novel secondary metabolites can inspire advances in chemical synthesis strategies to achieve their practical preparation for biological evaluation. In the process, chemical synthesis can also provide unambiguous structural characterization
Total Synthesis of (±)-Phomactin A. Lessons Learned from Respecting a Challenging Structural Topology
作者:Grant S. Buchanan、Kevin P. Cole、Yu Tang、Richard P. Hsung
DOI:10.1021/jo200936r
日期:2011.9.2
Our struggles and ultimate success in achieving a total synthesis of phomactin A are described. Our strategy features an intramolecular oxa-[3 + 3] annulation to construct its unique ABD-tricyclic manifold. Although the synthesis would constitute a distinctly new approach with the 12-membered D-ring of phomactin A being assembled simultaneously with the 1-oxadecalin at an early stage, the ABD-tricycle
描述了我们在实现 phomactin A 全合成方面的努力和最终成功。我们的策略采用分子内 oxa-[3 + 3] 环化来构建其独特的 ABD-三环流形。尽管合成将构成一种全新的方法,在早期阶段将 phomactin A 的 12 元 D 环与 1-oxadecalin 同时组装,但 ABD-三轮车代表了一种独特的结构拓扑,这将带来许多前所未有的挑战. 一个挑战是精心设计这辆三轮车以在适当的碳原子上进行氧化。为了克服这个问题,我们将利用过氧化物桥的 Kornblum-DeLaMare 开环以及具有挑战性的后期 1,3-烯丙醇转座。更远,
A total synthesis of (±)-phomactin A
作者:Christopher M. Diaper、William P. D. Goldring、Gerald Pattenden
DOI:10.1039/b307986d
日期:——
A total synthesis of the PAFantagonistphomactin A (1), isolated from the marinefungusPhomasp. is described. The synthesis is based on a Cr(II)/Ni(II) macrocyclisation from the aldehyde vinyl iodide 14, leading to the key phomactatrienol intermediate 16a, followed by elaboration of 16a to the epoxyketone 21, which undergoes spontaneous pyran and hemiacetal ring formation to 1 on deprotection with
Total Synthesis of (+)-Phomactin A Using a <i>B</i>-Alkyl Suzuki Macrocyclization
作者:Peter J. Mohr、Randall L. Halcomb
DOI:10.1021/ja0296531
日期:2003.2.19
A total synthesis of (+)-phomactin A is described using a B-alkyl Suzuki macrocyclization to incorporate the isolated trisubstituted olefin. This macrocyclization was accomplished with the sensitive hydrated furan ring in place. (R)-(+)-pulegone was used to establish the highly substituted cyclohexene core of the molecule.