Synthetic Studies on Selective, Proapoptotic Isomalabaricane Triterpenoids Aided by Computational Techniques
作者:Yaroslav D. Boyko、Christopher J. Huck、Shang Ning、Alexander S. Shved、Cheng Yang、Tiffany Chu、Emily J. Tonogai、Paul J. Hergenrother、David Sarlah
DOI:10.1021/jacs.0c12569
日期:2021.2.3
The isomalabaricanes comprise a large family of marine triterpenoids with fascinating structures that have been shown to be selective and potent apoptosis inducers in certain cancer cell lines. In this article, we describe the successful total syntheses of the isomalabaricanes stelletin A, stelletin E, and rhabdastrellic acid A, as well as the development of a general strategy to access other natural
异马拉巴烷包括一大类海洋三萜类化合物,具有迷人的结构,已被证明是某些癌细胞系中选择性和有效的细胞凋亡诱导剂。在这篇文章中,我们描述了异马拉巴烷类 stelletin A、stellin E 和 Rhabdastrellic acid A 的成功全合成,以及开发获取这一独特家族中其他天然产物的一般策略。在这一努力中使用了高通量实验和计算化学方法。对 stelletin A 的初步构效关系研究揭示了异马拉巴烷的 trans-syn-trans 核心基序对其细胞毒活性至关重要。
Correction to “Synthetic Studies on Selective, Proapoptotic Isomalabaricane Triterpenoids Aided by Computational Techniques”
作者:Yaroslav D. Boyko、Christopher J. Huck、Shang Ning、Alexander S. Shved、Cheng Yang、Tiffany Chu、Emily J. Tonogai、Paul J. Hergenrother、David Sarlah
DOI:10.1021/jacs.1c07261
日期:2021.8.11
document that reflects this correction is also available. The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/jacs.1c07261. (Corrected file) Detailed experimental procedures, spectroscopic data, computational data, and 1H and 13C NMR spectra (PDF) (Corrected file) Detailed experimental procedures, spectroscopic data, computational data, and 1H and 13C NMR spectra
图 2c 和第 2140 页上的随附文本以及 SI 错误地说明了 AD-mix-α 的使用。AD-mix-β 用于从11到 (+)- 13的转化。绘制的所有结构都是正确的,所有结论保持不变。还提供了反映此更正的修订支持信息文件。支持信息可在 https://pubs.acs.org/doi/10.1021/jacs.1c07261 免费获得。 (更正文件)详细的实验程序、光谱数据、计算数据以及1 H 和13 C NMR 光谱 (PDF)(更正文件)详细的实验程序、光谱数据、计算数据以及1 H 和13 C NMR 光谱 (PDF) 大多数电子支持信息文件无需订阅 ACS 网络版即可获得。此类文件可以按文章下载用于研究用途(如果相关文章有公共使用许可,则该许可可能允许其他用途)。可以通过 RightsLink 许可系统的请求从 ACS 获得许可用于其他用途:http://pubs.acs.or
γ-Allenyl Allyl Benzothiazole Sulfonyl Anions Undergo<i>cis</i>-Selective (Sylvestre) Julia Olefinations
作者:Angel R. de Lera、Belén Vaz、Rosana Alvarez、José A. Souto
DOI:10.1055/s-2004-837214
日期:——
γ-Allenyl allyl benzothiazolyl sulfones 8 and ent-8 provided allenyl trienes and polyenes with cis-selectivities ranging from 71:29 to 100:0 upon condensation (NaHMDS, THF, -78 °C to 25 °C) with a variety of unsaturated aldehydes.
A convergent strategy for the stereoselective synthesis of the methylester of the structurally challenging and highly labile antibacterial polyene polyketide natural product thailandamide A has been developed. The key steps include the Zincke aldehyde reaction, Stille cross coupling, Negishi reaction, Julia–Kocienski olefination, cross metathesis, and the less explored Pd(I)-based Heck coupling to
开发了一种聚合策略,用于立体选择性合成结构上具有挑战性且高度不稳定的抗菌多烯聚酮化合物天然产物泰国酰胺 A 的甲酯。关键步骤包括 Zincke 醛反应、Stille 交叉偶联、Negishi 反应、Julia-Kocienski 烯化、交叉复分解以及较少探索的基于 Pd( I ) 的 Heck 偶联以获得不同的不饱和键。此外,Urpi 乙缩醛醇醛、Evans 甲基化和 Crimmins 乙酸酯醇醛反应用于构建分子的六个不对称中心中的四个。
The syntheses of rac-inthomycin A, (+)-inthomycin B and (+)-inthomycin C using a unified synthetic approach
作者:Michael R. Webb、Matthew S. Addie、Catherine M. Crawforth、James W. Dale、Xavier Franci、Mathieu Pizzonero、Craig Donald、Richard J.K. Taylor
DOI:10.1016/j.tet.2008.01.116
日期:2008.5
The Stille coupling between a common oxazole vinyl iodide and stereodefined stannyl-diene units is described as the cornerstone of a unified synthetic route to the inthomycin family of bioactive Streptomyces metabolites. This procedure has been utilised to prepare (+)-inthomycin B and (+)-inthomycin C for the first time; in these examples the stereogenic centre was introduced using the Kiyooka ketene acetal/amino acid-derived oxazaborolidinone variant of the Mukaiyama aldol reaction. In addition, a convenient preparation of rac-inthomycin A is described based on the same strategy. (C) 2008 Elsevier Ltd. All rights reserved.