Synthesis, characterization and heterogeneous catalytic application of a nickel(II) Schiff base complex immobilized on MWCNTs for the Hantzsch four-component condensation
作者:Jamshid Rakhtshah、Sadegh Salehzadeh、Mohammad Ali Zolfigol、Saeed Baghery
DOI:10.1080/00958972.2016.1253068
日期:2017.1.17
highly efficient heterogeneous catalyst was synthesized and characterized by IR, X-ray diffraction patterns, scanning electron microscopy, energy-dispersive X-ray spectroscopy, inductively coupled plasma, elemental analysis, and thermal gravimetric analysis. Then a facile and environmentally benign procedure was developed for synthesis of polyhydroquinoline derivatives via Hantzschone-pot condensation
摘要 合成了一种固定在多壁碳纳米管 (MWCNTs) 表面的镍 (II) Schiff 碱配合物作为一种高效的多相催化剂,并通过 IR、X 射线衍射图、扫描电子显微镜、能量色散 X 射线光谱进行表征。 、电感耦合等离子体、元素分析和热重分析。然后,在上述合成催化剂的存在下,在无溶剂条件下,通过芳香醛、1,3-二酮、乙酰乙酸乙酯和乙酸铵的 Hantzsch 一锅缩合反应,开发了一种简便且环境友好的方法合成聚氢喹啉衍生物。该方案具有催化剂稳定性、易得性、可回收性和环保性,实验和后处理程序简单等优点,并且产量也很高。考虑到模型反应的无溶剂条件以及温度、时间和产率,这里报道的纳米催化剂是迄今为止报道的用于合成聚氢喹啉的最佳催化剂之一。
SUBSTITUTED HETEROCYCLIC COMPOUNDS
申请人:Abelman Matthew
公开号:US20090012103A1
公开(公告)日:2009-01-08
The present invention relates to novel heterocyclic compounds and to their use in the treatment of various disease states, including cardiovascular diseases and diabetes. In particular embodiments, the structure of the compounds is given by Formula (I):
wherein Q1, Q2, R2, R3, R4, R5, and R6 are as described herein.
The invention also relates to methods for the preparation of the compounds, and to pharmaceutical compositions containing such compounds.
Tetraethylammonium 2-(carbamoyl)benzoate as a bifunctional organocatalyst for one-pot synthesis of Hantzsch 1,4-dihydropyridine and polyhydroquinoline derivatives
作者:Mahsa Yarhosseini、Shahrzad Javanshir、Mohammad G. Dekamin、Mohammad Farhadnia
DOI:10.1007/s00706-016-1666-1
日期:2016.10
environment-friendly approach for the synthesis of biologically active Hantzsch1,4-dihydropyridine and polyhydroquinoline derivatives in the presence of tetraethylammonium 2-(carbamoyl)benzoate, as an effective bifunctional metal-free catalyst, has been developed via a one-pot multicomponent reaction of various aldehydes, ethyl acetoacetate or cyclic 1,3-dicarbonyl compounds, and ammonium acetate in EtOH
Introduction of a novel nanosized N-sulfonated Brönsted acidic catalyst for the promotion of the synthesis of polyhydroquinoline derivatives via Hantzsch condensation under solvent-free conditions
After the characterization of this reagent, it was efficiently used for the promotion of the one-potsynthesis of hexahydroquinolines via one-potfour-component condensation of aryl aldehydes, 1,3-cyclohexadione derivatives, β-ketoesters and ammonium acetate under solvent-free conditions. The procedure gave the products in excellent yields in short reaction times and good to high yields. Also this catalyst
在这项研究中,4,4'-(1-丁烷1,4-丁二)双(1-磺基-1,4-二氮杂双环[2.2.2]辛烷-1,4-二鎓)四氯化物(NS-C 4(DABCO-使用不同类型的方法,包括FT-IR,1 H NMR,13 C NMR,质量,XRD,TGA,SEM和AFM分析,制备并表征了作为新型纳米级N-磺酸的SO 3 H)2)·4Cl)。该试剂的特征后,将其有效地用于促进一锅合成hexahydroquinolines的经由在无溶剂条件下,一锅四组分缩合芳基醛,1,3-环己二酮衍生物,β-酮酸酯和乙酸铵。该程序在短的反应时间内以优异的产率获得了产物,并且从良好的产率到高的产率。同样,该催化剂可以重复使用几次而不会损失其催化活性。
MoO<sub>2</sub>Cl<sub>2</sub>catalyzed efficient synthesis of functionalized 3,4-dihydropyrimidin-2(1H)-ones/thiones and polyhydroquinolines: recyclability, fluorescence and biological studies