Efficient Protocol for Synthesis of Pyrazolo[3,4-a]acridines
摘要:
A new class of pyrazolo[3,4-a]acridines have been prepared. The synthon acridones were obtained in very good yield by a one-pot reaction of 2-amino-5-chloro or nitro substituted benzophenones with 1,3-cyclic diketones in the presence of freshly prepared Eaton's reagent without solvent, using Friedlander synthesis. The intermediates were reacted with ethylformate followed by hydrazine hydrate to afford pyrazolo[3,4-a]acridines. All of the compounds were purified by recrystallization only, and no chromatographic workup was required. The structures of the synthesized compounds were deduced by spectroscopic techniques, including single-crystal x-ray diffraction.
Nickel nanoparticles: a highly efficient and retrievable catalyst for the solventless Friedlander annulation of quinolines and their in silico molecular docking studies as histone deacetylase inhibitors
作者:Gangadhara Angajala、Radhakrishnan Subashini
DOI:10.1039/c5ra06593c
日期:——
environmental friendly, green, solvent-free protocol for the preparation of polysubstituted quinolines via Friedlander annulation using nickel nanoparticles (80–100 nm) biofabricated from AegleMarmelosCorrea aqueous leaf extract. These nickel nano materials exhibit high catalytic efficacy to achieve the target molecules in excellent yields ranging from 85–96% mainly due to their diverse properties
本工作探索了一种高效,环保,绿色,无溶剂的方案,该方案通过使用从Aegle Marmelos Correa水性叶片提取物中生物制造的镍纳米粒子(80–100 nm),通过弗里德兰德法制得多取代喹啉。这些镍纳米材料显示出高催化效率,以优良的收率(85-96%)可实现目标分子,这主要是由于它们具有多种多样的特性以及高的表面积体积比。FT-IR,1 H NMR,13成功表征了合成的多取代喹啉1 H NMR和GC-MS。已经研究了各种溶剂和催化剂浓度对喹啉合成的影响,其中在无溶剂条件下,以镍纳米催化剂的10mol%获得高产率的产物。该催化剂在无溶剂条件下可在较短的反应时间内重复使用多达五个循环,而产物收率没有任何重大损失,这是这种多相固体催化的独特特征。此外,更安全的反应曲线,高选择性,更高的收率,可靠的成本效益,简单的后处理条件是这种绿色环保工艺的一些值得注意的亮点。在计算机上对喹啉衍生物作为组
Synthesis of calcium silicate nanoparticles and its catalytic application in Friedlander reaction
作者:Jeyakannu Palaniraja、Prabhakarn Arunachalam、U. Vijayalakshmi、Mohamed A. Ghanem、Selvaraj Mohana Roopan
DOI:10.1080/24701556.2016.1241274
日期:2017.6.3
This work describes the nitric acid catalysed synthesis of wollastonite (CaSiO3) nanoparticles (NP) from tetraethyl orthosilicate and calcium nitrate tetrahydrate. The formed calcium silicate nanoparticles were characterized by Fourier transform infrared spectroscopy (FTIR), Powder X-ray Diffraction (PXRD), and scanning electron microscopy (SEM) equipped with X-ray micro analysis. The CaSiO3 NPs showed
Synthesis, characterization, and hypoglycemic efficacy of nitro and amino acridines and 4-phenylquinoline on starch hydrolyzing compounds: an in silico and in vitro study
α-Glucosidase are important therapeutic targets for type II diabetes. The present focus of our study is to elucidate the hypoglycemic activity of novel compounds through in vitro and in silico studies. Here, we synthesized the nitro acridines ( 3a–3c), amino acridines (4a–4c ), and nitro phenylquinoline ( 3d) and amino phenylquinoline (4d ) using a multi-step reaction protocol in good yields. All the above derivatives
Ultrasound promoted montmorillonite K-10 catalyzed synthesis, characterization, molecular modelling, SAR and hypoglycemic studies of new rhodanine bejeweled acridine analogues
catalyst upto five cycles. In silico molecular docking studies were carried out to find out the effective bindingaffinity of the synthesized acridine analoguestowards PPARγ protein (Id-2XKW). The results obtained showed that compounds 6c and 6g possess good binding interaction towards PPARγ with binding energy of -9.6 and -9.0 k.cal/mol which was greater than standard Acarbose (-8.9 k.cal/mol) and comparable
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.