Macrodiolide Diversification Reveals Broad Immunosuppressive Activity That Impairs the cGAS‐STING Pathway
作者:Han Liu、Rasmus N. Ottosen、Kira M. Jennet、Esben B. Svenningsen、Tobias F. Kristensen、Mette Biltoft、Martin R. Jakobsen、Thomas B. Poulsen
DOI:10.1002/anie.202105793
日期:2021.8.16
formation of all possible stereoisomers. In total, 18 analogues were prepared. Two analogues with minor structural modifications showed clearly enhanced cancer cell line selectivity and reduced toxicity. Moreover, these compounds possessed broad inhibitory activity against innate immunological pathways in human PBMCs, including the DNA-sensing cGAS-STING pathway. Initial mechanistic characterization suggests
新免疫调节剂的开发可以影响医学的各个领域。特别是,具有调节先天免疫途径能力的化合物具有显着的未开发潜力。在此,我们报告了一种模块化合成方法,用于大二内酯天然产物 (-)-vermiculine,一种先前显示具有多种生物学效应的药剂,包括细胞毒性和免疫抑制活性。该合成允许在修改大环骨架方面具有高度的灵活性,包括形成所有可能的立体异构体。总共制备了18个类似物。两种具有微小结构修饰的类似物显示出明显增强的癌细胞系选择性和降低的毒性。此外,这些化合物对人 PBMC 中的先天免疫通路具有广泛的抑制活性,包括 DNA 感应 cGAS-STING 通路。最初的机械特性表明 STING-TBK1 相互作用出现了令人惊讶的损害。
Concise Total Synthesis of (−)‐Vermiculine through a Rhodium‐Catalyzed
<i>C</i>
<sub>2</sub>
‐Symmetric Dimerization Strategy
作者:Philip Steib、Bernhard Breit
DOI:10.1002/chem.201900216
日期:2019.3.7
A short and efficientsynthesis of the C2‐symmetric antibiotic (−)‐vermiculine by utilizing an enantioselective catalytic one‐step dimerization methodology as key‐step to construct the core structure is reported. The late‐stage modifications feature a double metathesis homologation followed by a double Wacker‐type oxidation. These key‐steps allowed the synthesis of vermiculine in only seven steps, starting