Photo-oxidative aromatization and photo-rearrangement of 2, 4-diaryl-5-oxohexahydroquinolines
作者:Fatemeh Abdollahi Rizi、Hamid R. Memarian、Hadi Amiri Rudbari、Olivier Blacque
DOI:10.1016/j.jphotochem.2023.115414
日期:2024.4
radical intermediate was supported by the results of the experimental works and the DFT-computational studies. X-ray crystalstructure analysis of two of 5-oxohexahydroquinoline compounds indicated that i). The C4-aryl ring occupies the pseudo-axial position of the twisted-boat conformation of the heterocyclic dihydropyridine ring and, ii). Owing to the steric ortho-repulsion, the C2-aryl ring has a non-planar
合成了各种2,4-双芳基取代的5-氧代六氢喹啉,并研究了2-和4-取代对这些化合物的光化学行为的电子效应。这些化合物的紫外光照射导致发生两种类型的光反应:氧化 正常的光氧化和光重排反应。在这两个反应中,均观察到杂环1,4-二氢吡啶环芳构化为吡啶环。光化学结果表明自由基中间体的参与,负责芳环迁移和光重排反应的发生。实验工作和DFT计算研究的结果支持了所涉及的自由基中间体的捕获自由基稳定化的部分协同效应。两种5-氧代六氢喹啉化合物的X射线晶体结构分析表明i ) 。C 4 -芳基环占据杂环二氢吡啶环的扭船构象的假轴位置,并且, ii )。由于空间邻位排斥,C 2 -芳基环具有关于杂环的连接的C C 双键的非平面取向。这些观察结果与 DFT 计算研究和 X 射线晶体结构分析的数据非常一致。
Design and synthesis of 2,4-disubstituted polyhydroquinolines as prospective antihyperglycemic and lipid modulating agents
A series of 2,4-disubstituted polyhydroquinoline were synthesized and evaluated for their in vivo antihyperglycemic as well as antidyslipidemic activities. Several synthesized compounds have exhibited promising in vivo antihyperglycemic in SLM, STZ-S, and db/db mice model along with significant lipid and TG modulating activity. All these compounds were evaluated in various in vitro models of diabetes to know the possible mechanism of their antihyperglycemic action. Interestingly, compounds 3a-r (diaryl substitution) have exhibited promising protein-tyrosine phosphatase 1B (PTP1B) inhibitory activity whereas, compounds 5a-d (acid substituted) have shown significant glycogen phosphorylase activity. (C) 2009 Published by Elsevier Ltd.
Para Substituted Benzaldehydes as Expedient Reagents for the Oxidative Aromatization of Hydroquinoline
作者:Poulomi Majumdar、Anita Pati、Rajani K. Behera、Ajaya Kumar Behera
DOI:10.1002/jhet.1117
日期:2013.5
A Cannizzaro‐type reaction of tetrahydro‐5(1H)‐quinolinones with para substitutedbenzaldehydes in the presence of a base formed the corresponding quinoline and aryl methanol rather than arylidene derivatives because of the oxidation of tetrahydroquinoline and reduction of benzaldehydes as a result of unprecedented hydride transfer from tetrahydroquinoline to arylaldehydes. The reaction proceeds best