Preparation of a new DABCO-based ionic liquid and investigation on its application in the synthesis of benzimidazoquinazolinone and pyrimido[4,5-b]-quinoline derivatives
In this article, we report the preparation of a new ionicliquid from the reaction of DABCO and sulfuric acid and its characterization using FT-IR, Mass and NMR spectroscopy. This ionicliquid is air- and water-stable and affordable. Afterward this reagent is used for the synthesis of benzimidazoquinazolinone and pyrimido[4,5-b]-quinoline derivatives as a catalyst. The results show the applicability
在本文中,我们报告了由DABCO与硫酸反应制备的新型离子液体,并使用FT-IR,质谱和NMR光谱对其进行了表征。这种离子液体对空气和水都是稳定的,并且价格适中。此后,该试剂用于合成苯并咪唑并喹唑啉酮和嘧啶并[4,5- b ]-喹啉衍生物作为催化剂。结果表明,所制备的试剂作为可重复使用的催化剂的适用性而不会损失其活性。该方法具有一些优点,例如易于制备催化剂,后处理步骤简单,反应时间短,产率高以及使用无毒且廉价的催化剂。
1,3-Disulfonic acid imidazolium hydrogen sulfate: a reusable and efficient ionic liquid for the one-pot multi-component synthesis of pyrimido[4,5-b]quinoline derivatives
A green, simple and convenient method for the synthesis of pyrimido[4,5-b]quinoline derivatives has been developed through a three-component one-pot condensation of 6-amino-1,3-dimethyluracil, aldehydes, and cyclic 1,3-diketones in the presence of 1,3-disulfonic acid imidazolium hydrogen sulfate [dsim]HSO4 as an efficient catalyst. The present methodology offers several advantages such as excellent
通过6-氨基-1,3-二甲基尿嘧啶,醛和环1的三组分一锅缩合反应,开发了一种绿色,简便的合成嘧啶并[4,5- b ]喹啉衍生物的方法。在1,3-二磺酸咪唑硫酸氢盐[dsim] HSO 4存在下的3-二酮为有效催化剂。本方法提供了许多优点,例如优异的产率,简单的方法,短的反应时间,产物的高产率和容易的后处理程序。而且,该催化剂易于回收并且可以重复使用几次而其活性没有明显降低。
Nano-[Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>/<i>N</i>-propyl-1-(thiophen-2-yl)ethanimine][ZnCl<sub>2</sub>] as a nano magnetite Schiff base complex and heterogeneous catalyst for the synthesis of pyrimido[4,5-<i>b</i>]quinolones
Nano-[Fe3O4@SiO2/N-propyl-1-(thiophen-2-yl)ethanimine][ZnCl2] as a nano magnetite Schiff base complex was designed and successfully tested for the synthesis of pyrimido[4,5-b]quinolones.
Nano-Fe3O4 encapsulated-silica particles bearing sulfonic acid groups as a magnetically separable catalyst for green and efficient synthesis of functionalized pyrimido[4,5-b]quinolines and indeno fused pyrido[2,3-d]pyrimidines in water
作者:Firouzeh Nemati、Raheleh Saeedirad
DOI:10.1016/j.cclet.2013.02.018
日期:2013.5
The magnetic nanoparticles supported silica sulfuric acid was used as an efficient catalyst for the synthesis of pyrimido[4,5-b]quinolines and indeno fused pyrido[2,3-d]pyrimidines in water. The desired products were obtained in excellent yields. Fe3O4@SiO2-SO3H was readily recovered using an external magnet and could be reused several times without significant loss of reactivity. (C) 2013 Firouzeh Nemati. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
An eco-friendly and magnetized biopolymer cellulose-based heterogeneous acid catalyst for facile synthesis of functionalized pyrimido[4,5-b]quinolines and indeno fused pyrido[2,3-d]pyrimidines in water
energy-dispersive X-ray spectroscopy, thermogravimetric analysis, X-ray diffraction, and scanning electron microscopy. Thereafter, its capability to promote the one-pot, three-componentsynthesis of pyrimido [4,5-b] quinolone and pyrido [2,3-d] pyrimidinederivatives was evaluated. The obtained results are indicative of excellent yields and short reaction times. The biopolymer based catalyst is readily recovered