本研究通过铜盐与氰尿酸作为三齿配体的水热反应,设计并制备了一种新型含铜配位聚合物体系。通过 XRD、BET、SEM、EDS、FT-IR 和 X 射线图谱技术对制备的配位聚合物进行了研究。所制备的Cu-CYA配位聚合物在反应条件温和、反应时间短的聚氢喹啉合成中表现出良好的催化活性。此外,这种纳米结构具有一些优点,包括产量高、反应时间短、稳定性、方法简单、后处理简单和更环保。此外,对回收催化剂的活性进行了至少五个循环的检查,其活性损失可以忽略不计。
Nano-ferrous ferric oxide (nano-Fe<sub>3</sub>O<sub>4</sub>): magnetite catalytic system for the one-pot four-component tandem imine/enamine formation-Knoevenagel–Michael-cyclocondensation reaction of dimedone, aldehydes, β-ketoesters and ammonium acetate under green media
In this work, magnetite nano-Fe3O4 was applied as a green, efficient, heterogeneous and reusable catalytic system for the atomic economic preparation of hexahydroquinolines via the one-pot multi-component reaction of aryl aldehydes, dimedone (5,5-dimethylcyclohexane-1,3-dione), β-ketoesters and ammonium acetate at 50 °C under mild and solvent-free conditions. The catalyst was synthesized and characterized by several techniques including Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), vibrating sample magnetometry (VSM) and transmission electron microscopy (TEM). Also, optimization of the reaction conditions was investigated using the response surface method Central Composite Design (CCD)}.
Synthesis of hexahydroquinoline (HHQ) derivatives using ZrOCl<sub>2</sub>·8H<sub>2</sub>O as a potential green catalyst and optimization of reaction conditions using design of experiment (DOE)
In this investigation, hexahydroquinoline (HHQ) derivatives were synthesizedviaa one-pot reaction using dimedone, β-ketoester, ammonium acetate, and different aryl aldehydes.
analysis (EDX), X‐ray diffraction patterns (XRD), scanning electron microscopy (SEM), vibrating sample magnetometer (VSM) and transmission electron microscopy (TEM). Nano‐CoAl2O4 was applied for the synthesis of hexahydroquinoline derivatives by the condensation reaction between ethyl acetoacetate, dimedone and various aldehydes. These reactions were carried out at 80 °C under solvent‐free conditions.
在这项工作中,制备了纳米CoAl 2 O 4并通过FT-IR,能量色散X-射线分析(EDX),X-射线衍射图(XRD),扫描电子显微镜(SEM),振动样品磁力计(VSM)进行了表征)和透射电子显微镜(TEM)。通过乙酰乙酸乙酯,二甲酮与各种醛的缩合反应,将纳米CoAl 2 O 4用于合成六氢喹啉衍生物。这些反应在无溶剂条件下于80°C进行。
Magnetic‐based picolinaldehyde–melamine copper complex for the one‐pot synthesis of hexahydroquinolines via Hantzsch four‐component reactions
vibrating sample magnetometry and thermogravimetric analysis. The catalyst was used to activate the raw materials in the synthesis of hexahydroquinoline derivatives in one‐potfour‐componentreactions. Low reaction time (minutes versus half an hour), solvent‐free condition and magnetically separable catalyst are some salient features of the developed catalyst. Also, the optimum amount of catalyst and temperature
吡啶甲醛-三聚氰胺铜络合物负载在磁性Fe 3 O 4上,因此每克含0.33 mmol的铜,并被用作有效的催化剂。使用多种技术对合成后的催化剂进行了表征,包括傅立叶变换红外光谱,X射线衍射,能量色散X射线光谱,场发射扫描电子显微镜,透射电子显微镜,振动样品磁力分析和热重分析。在单锅四组分反应中,使用该催化剂活化六氢喹啉衍生物的合成原料。反应时间短(数分钟相对于半小时),无溶剂条件和可磁分离的催化剂是已开发催化剂的显着特征。同样,确定的最佳催化剂量和温度分别为0.07 g和87.6°C,
Nano-Mn-[4-nitrophenyl-salicylaldimine-methyl pyranopyrazole]Cl<sub>2</sub>
as a new nanostructured Schiff base complex and catalyst for the synthesis of hexahydroquinolines
reaction of 4‐nitrobenzaldehyde with ethylacetoacetate, malononitrile and hydrazine hydrate, pyranopyrazole derivative as an active biological compound was synthsized and then reacted with salicylaldehyde and MnCl2.4H2O to afford nano‐Mn‐[4‐nitrophenyl‐salicylaldimine‐methyl pyranopyrazole]Cl2 (nano‐[Mn‐4NSMP]Cl2) for the first time. The produced Schiff base complex with nanostructured was fully characterized