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。
Synthesis of the first nano ionic liquid 1-methylimidazolium trinitromethanide {[HMIM]C(NO<sub>2</sub>)<sub>3</sub>} and its catalytic use for Hanztsch four-component condensation
作者:Mohammad Ali Zolfigol、Saeed Baghery、Ahmad Reza Moosavi-Zare、Seyed Mohammad Vahdat、Heshmatollah Alinezhad、Mohammad Norouzi
DOI:10.1039/c4ra09117e
日期:——
A novel, green and reusable nano ionic liquid and catalyst, namely 1-methylimidazolium trinitromethanide [HMIM]C(NO2)3}, was designed and fully characterized by 1H NMR, 13C NMR, IR, mass, X-ray diffraction patterns (XRD) and Transmission electron microscopy (TEM) analysis. The catalytic application of the presented catalyst was successfully tested on the Hantzsch four-component reaction of various aromatic aldehydes, 1,3-dione, β-ketoester and ammonium acetate at room temperature under solvent-free and mild conditions to give the polyhydroquinoline derivatives in good to excellent yields. In the presented work, some products have been reported for the first time.
Straightforward Hantzsch four- and three-component condensation in the presence of triphenyl(propyl-3-sulfonyl)phosphoniumtrifluoromethanesulfonate {[TPPSP]OTf} as a reusable and green mild ionic liquid catalyst
作者:Seyed Mohammad Vahdat、Mohammad Ali Zolfigol、Saeed Baghery
DOI:10.1002/aoc.3433
日期:2016.5
reusable, green and benign ionicliquid catalyst has been used in the Hantzsch four‐component (synthesis of polyhydroquinolines) and three‐component (synthesis of acridines) condensation reactions of 1,3‐diones, β‐ketoesters, aldehydes, ammonium acetate and aniline derivatives in the presence of 0.5 mol% of [TPPSP]OTf} at room temperature under solvent‐free conditions. The new ionicliquid catalyst
The development of an atom-economical approach for the efficient construction of diversely functionalized molecules from easily accessible starting materials is always a special issue for synthetic organic chemists. The 4-substituted 1,4-dihydropyridine (1,4-DHP) nucleus is a rich source of biological molecules which are useful as antihypertensive, vasodilator, antitherosclerotic, antitumor, geroprotective
Covalently anchored sulfamic acid on cellulose as heterogeneous solid acid catalyst for the synthesis of structurally symmetrical and unsymmetrical 1,4-dihydropyridine derivatives
energy dispersive X-ray (EDX), thermogravimetric (TGA) and CHNS analysis. The catalytic performance of the heterogeneous acid catalyst is evaluated in the synthesis of structurally symmetrical and unsymmetrical 1,4-dihydropyridines (1,4-DHPs). High conversion, shorter reaction time, cleaner reaction profile, environmentallybenign solvent, simple experimental and work-up procedure, and reusability of the
通过将氯磺酸共价接枝到氨基官能化纤维素(Cell–Pr-NHSO 3 H)上,已经制备了一种新型的非均相固体酸催化剂。通过FT-IR,固态CP / MAS 13 C-NMR光谱,场发射扫描电子显微镜(FE-SEM),能量色散X射线(EDX),热重(TGA)和CHNS评估催化剂的结构分析。在结构对称和不对称的1,4-二氢吡啶(1,4-DHPs)的合成中评估了多相酸催化剂的催化性能。高转化率,更短的反应时间,更清洁的反应过程,对环境无害的溶剂,简单的实验和后处理程序以及催化剂的可重复使用性是我们合成路线的显着特征。