One-pot synthesis of heteroaromatic acetals via selectfluor-mediated tandem reaction of methyl quinoline-2-carboxylate and methanol
作者:Wengui Wang、Zhenqiang Chen、Yingying Zhang、Wei Zeng、Shoufeng Wang
DOI:10.1016/j.tet.2021.132607
日期:2022.1
report a mild Ag-catalyzed domino acetalization reaction using quinoline-2-carboxylates, which were substructures in a number of natural products. Methanol was directly utilized as the source of the acetal part. The main features of the dominoreaction include the Minisci reaction, oxidation, and acetalization. Hydrogen fluoride generated in-situ participates in the Minisci reaction, and no external acids
在这里,我们报告了使用 quinoline-2-carboxylates 的温和 Ag 催化的多米诺缩醛化反应,它是许多天然产物的亚结构。甲醇直接用作缩醛部分的来源。多米诺骨牌反应的主要特征包括 Minisci 反应、氧化和缩醛化。原位产生的氟化氢参与Minisci反应,无需外加酸。这种多米诺骨牌反应为在温和条件下使用甲醇生成杂芳族缩醛提供了一种简单而通用的途径,具有良好的官能团耐受性。
Biomimetic asymmetric reduction of 2-functionalized quinolines has been successfully developed with the chiral and regenerable NAD(P)H model CYNAM in the presence of transfer catalyst simple achiral phosphoric acids, providing the chiral 2-functionalized tetrahydroquinolines with up to 99% ee. Using this methodology as a key step, a chiral and potent opioid analgesic containing a 1,2,3,4-tetrahydroquinoline
Discovery and efficient synthesis of a biologically active alkaloid inspired by thiostrepton biosynthesis
作者:Qingfei Zheng、Shoufeng Wang、Wen Liu
DOI:10.1016/j.tet.2014.06.076
日期:2014.10
numerous biological activities, including anti-bacterial, anti-tumor, and anti-plasmodial activities. The quinaldic acid (QA) moiety-containing side ring (loop 2) was proven to play an important role in carrying out these functions. Previously, we proposed biosynthetic logic for thiostrepton loop 2 and demonstrated the formation mechanism of QA. Herein, we report the discovery and efficient synthesis of