在本文中,报道了制备双咪唑硫酸氢盐和双咪唑高氯酸盐作为两种新的基于咪唑的双阳离子布朗斯台德酸性离子液体。通过FT-IR,质谱,NMR光谱和pH滴定法进行表征后,研究了这些试剂在促进5-亚芳基巴比妥酸和吡喃并[2,3- d ]嘧啶酮衍生物的合成中的适用性。这些方法具有一些优点,例如易于制备催化剂,简单的后处理步骤,短的反应时间,优异的产率以及在反应的所有步骤中使用非有机溶剂以及催化剂的良好可重复使用性。
catalyst for the synthesis of 4H-pyran scaffolds such as tetrahydrobenzo[b]pyran and pyrano[2,3-d]pyrimidinone(thione) derivatives. The use of inexpensive and bio-compatible reagents for the synthesis of the catalyst, a simple and green procedure for the preparation of the catalyst and products, short reaction times, high yields of the products, and applicability to large-scale synthesis are the prominent
在最近的有机合成中,对环境无害的合成方法的发展引起了越来越多的关注。作为这一概念的一部分,我们的小组使用加巴喷丁和氯化胆碱合成了一种新型的天然深共熔溶剂(NADES)。在通过FTIR,1 H和13 C NMR以及质谱进行表征后,所制备的NADES被用作合成4 H-吡喃骨架如四氢苯并[ b ]吡喃和吡喃并[2,3- d ]的有效催化剂。]嘧啶酮(硫酮)衍生物。廉价的和生物相容性试剂用于催化剂的合成,用于催化剂和产物的制备的简单且绿色的过程,短的反应时间,产物的高产率以及适用于大规模合成是突出的问题。该协议的功能。而且,该催化剂可以容易地回收并循环多达五次,而不会显着损失其催化活性。
SCMNPs@Urea/Py-CuCl<sub>2</sub>: a recyclable catalyst for the synthesis of pyrano[2,3-<i>d</i>]pyrimidinone and pyrano[2,3-<i>d</i>] pyrimidine-2,4,7-trione derivatives
作者:Jun Zhang、Hongqing Song、Ruirui Cui、Chaoyong Deng、Qahtan A. Yousif
DOI:10.1080/00958972.2020.1737681
日期:2020.2.16
Abstract An efficient, simple, and mild strategy for the one-pot multicomponent synthesis of pyrano[2,3-d]pyrimidinone and pyrano[2,3-d]pyrimidine-2,4,7-trione derivatives is described using SCMNPs@Urea/Py-CuCl2 nanoparticles as a reusable heterogeneous magnetic nanocatalyst. The catalyst was characterized using Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), vibrating
Nano-Zn[2-boromophenylsalicylaldiminemethylpyranopyrazole]Cl<sub>2</sub>as a novel nanostructured Schiff base complex and catalyst for the synthesis of pyrano[2,3-<i>d</i>]pyrimidinedione derivatives
several techniques. Nano‐[Zn‐2BSMP]Cl2 was used as an effective catalyst for the preparation of some pyrano[2,3‐d]pyrimidinedione derivatives by the multicomponent reaction of malononitrile, aryl aldehydes and barbituric acid derivatives. The novelty and efficiency of nano‐[Zn‐2BSMP]Cl2 as a catalyst, in comparison with some other reported catalysts, for this synthetic transformation are the main features