摘要这项研究探索了一种绿色方法学,该方法通过使用水作为溶剂的弗里德兰德环化法合成多取代喹啉。为了评估该方法的可行性,将获得的结果与涉及能源使用的方法进行了比较,例如机械搅拌,加热,微波辐射和无溶剂加热反应。为了证明该方法的效率和一致性,已使用该方案进行了批量反应,并合成了许多喹啉衍生物,并通过1 H,13 C NMR,熔解范围和HR-MS对其进行了表征。 图形概要
Sulfated Polyborate Catalyzed Selective Friedlander Annulation for Synthesis of Highly Functionalized Quinolines
作者:Anil S. Mali、Abhishek B. Sharma、Ganesh U. Chaturbhuj
DOI:10.1080/00304948.2020.1762457
日期:2020.7.3
The quinoline moiety is a privileged scaffold because of the wide spectrum of its biological activities. 1 , 2 Along with the Friedlander annulation, other procedures developed for the synthesis of...
quinolines via Friedländer annulation was carried out in the presence of catalytic amount of o-benzenedisulfonimide as Brønstedacid organocatalyst; the reaction conditions were mild and the yields of the target products were good. The organocatalyst was easily recovered and purified, ready to be used in further reactions.
Metal-free C(sp<sup>3</sup>)–H functionalization (C–C and C–N bond formation) of 1,2,3,4-tetrahydroacridines using deep eutectic solvents as catalyst and reaction medium
Herein, we report a metal-free and efficient method for the C(sp3)–H functionalization of 1,2,3,4-tetrahydroacridines at the C4-position by the addition of azodicarboxylates (C–N bond) and maleimides (C–C bond) using deep eutectic solvents (DESs) at 80 °C. The C4-functionalized 1,2,3,4-tetrahydroacridines were achieved with high atom efficiency, precise regioselectivity, and yields ranging from 70–96%
Design, synthesis and evaluation of acridine and fused-quinoline derivatives as potential anti-tuberculosis agents
作者:Gisela C. Muscia、Graciela Y. Buldain、Silvia E. Asís
DOI:10.1016/j.ejmech.2013.12.013
日期:2014.2
The synthesis of twelve acridine and polycyclic acridine derivatives prepared via the Friedlander reaction is described. The one-pot reactions of 2-amino-5-chloro or 5-nitro-benzophenones and a variety of cydanones and indanones were carried out in a MW oven under TFA catalysis in good yields. The products were designed according natural antituberculosis products and were evaluated for growth inhibitory activity towards Mycobacterium tuberculosis H(37)Rv (Mtb) through the National Institute of Allergy and Infectious Diseases (NIAID, USA). Three of them underwent additional testings. The cyclopenta[b]quinoline derivative 9 and the acridine derivative 13 showed remarkable MIC values against the rifampin resistant strain. The former exhibited bactericidal activity at 50 mu g/mL, its intracellular activity is similar to rifampin and it was not cytotoxic at low concentrations so it can be considered a new lead compound. (C) 2013 Elsevier Masson SAS. All rights reserved.