Immobilization of Cu(II) on MWCNTs@L-His as a new high efficient reusable catalyst for the synthesis of pyrido[2,3-d:5,6-d′]dipyrimidine derivatives
作者:Hakimeh Saeidiroshan、Leila Moradi
DOI:10.1016/j.jorganchem.2019.04.023
日期:2019.8
A clean, rapid and efficient synthesis of pyrido[2,3-d:5,6-d′]dipyrimidine derivatives was accomplished in high to excellent yields and short reaction times via one-pot three-component condensation reaction of barbituric acid or 1,3-dimethylbarbituric acid, 6-aminouracil and aromatic aldehydes in the presence of [email protected]/Cu(II) under reflux conditions. This new catalyst can be easily separated
在这项研究中,通过将铜(II)固定在1-组氨酸官能化的多壁碳纳米管上制备了一种新的非均相有机金属催化剂([受电子邮件保护] / Cu(II))。使用简单的方法制备催化剂,并通过傅里叶变换红外(FTIR),扫描电子显微镜(SEM),透射电子显微镜(TEM),能量色散光谱(EDS),热分析(TGA),电感耦合等离子体发射光谱法进行表征(ICP-OES)和Brunauer Emmett Teller(BET)技术。通过高收率,优异的收率和较短的反应时间,可以实现清洁,快速,高效地合成吡啶并[2,3- d:5,6- d ']二嘧啶衍生物在[电子邮件保护的] / Cu(II)的存在下,在回流条件下,巴比妥酸或1,3-二甲基巴比妥酸,6-氨基尿嘧啶和芳香醛的一锅三组分缩合反应。这种新催化剂可以很容易地从反应混合物中分离出来,并回收数次,而活性没有明显损失。
<i>N</i>
-propylbenzoguanamine sulfonic acid-functionalized magnetic nanoparticles: A novel and magnetically retrievable catalyst for the synthesis of 1,4-dihydropyridine derivatives
activity of N‐propylbenzoguanamine sulfonic acid stabilized on silica‐coated nano‐Fe3O4 particles (Fe3O4/SiO2‐N‐propyl‐benzoguanamine‐SO3H) were proven to be as a novel magnetic solid acid catalyst for the synthesis of 1,4‐dihydropyridinederivatives in a one‐pot pseudo‐four‐component condensation reaction of barbituric acid, aromatic aldehydes, and ammonium acetate or aniline with high yield and short reaction
的催化活性Ñ稳定在二氧化硅涂覆的纳米铁-propylbenzoguanamine磺酸3个ö 4颗粒(铁3 ö 4 /二氧化硅2 - ñ -丙基-苯并胍胺- SO 3H)被证明是一种新颖的磁性固体酸催化剂,可在巴比妥酸,芳族醛与乙酸铵或苯胺的一锅式假四组分缩合反应中合成1,4-二氢吡啶衍生物反应时间短。通过傅立叶变换红外光谱(IR),场发射扫描电子显微镜(FE‐SEM),透射电子显微镜(TEM),能量色散X射线分析(EDXA),X‐射线衍射(XRD),热重分析(TGA),差热分析(DTA)和振动样品磁力分析(VSM),原子吸收光谱(AAS)以及电感耦合等离子体质谱(ICP-MS)。结果表明,合成的磁铁矿纳米颗粒的平均尺寸为约25nm。另外,该多相催化剂可以容易地磁性回收,并且可以在不显着损失其催化活性的情况下重新用于进一步的运行。
Synthesis of pyrido[2,3‐
<i>d</i>
:5,6‐
<i>d</i>
′]dipyrimidines using CuFe
<sub>2</sub>
O
<sub>4</sub>
/KCC‐1/PMA as a novel and efficient nanocatalyst under solvent‐free conditions
作者:Seyyed Hojjat Sadeghi、Morteza Yaghoobi、Mohammad Ali Ghasemzadeh
DOI:10.1002/aoc.6771
日期:2022.8
In this research, the synthesis of pyrido[2,3-d:5,6-d′]dipyrimidines by CuFe2O4/KCC-1/PMA magnetic nanoparticles was reported. Synthesis of pyrido[2,3-d:5,6-d′]dipyrimidines was performed under solvent-free conditions with good to excellent yields. The prepared nanocatalyst was synthesized in three steps and also was characterized by Fourier transform infrared (FT-IR) spectroscopy, scanning electron
本研究报道了利用CuFe 2 O 4 /KCC-1/PMA磁性纳米粒子合成吡啶并[2,3- d :5,6 - d ']二嘧啶。吡啶并[2,3 - d :5,6 - d ']二嘧啶的合成是在无溶剂条件下进行的,收率良好。制备的纳米催化剂分三步合成,并通过傅里叶变换红外(FT-IR)光谱、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、能量色散X射线光谱(EDX)、X-射线衍射 (XRD)、振动样品磁强计 (VSM) 和 N 2吸附-解吸测量(Brunauer-Emmett-Teller [BET])分析。此外,CuFe 2 O 4 /KCC-1/PMA的可重复使用性研究表明,回收的催化剂可以多次使用。
Synthesis of pyridodipyrimidine derivatives using MgFe2O4@Tris as a new nanocatalyst under green condition
作者:Zahra Ramezaninejad、Lotfi Shiri
DOI:10.1007/s11164-024-05314-5
日期:2024.7
microscopy, X-ray diffraction and thermogravimetric analysis. Finally, an economical and efficient method for pyridodipyrimidine synthesis was developed using an environmentally friendly and recyclable MgFe2O4@Tris nanocatalyst in an aqueousmedium. For the synthesis of pyridodipyrimidines, a four-componentreaction was carried out at room temperature using aldehyde derivatives, barbituric acid and ammonium
目前正在开发用于合成基本化合物的催化方法。因此,采用铁酸镁作为纳米粒子来合成高效且可回收的纳米催化剂。采用傅里叶变换红外光谱(FT-IR)、振动样品磁强计、能量色散X射线光谱、透射电子显微镜(TEM)、扫描电子显微镜、X射线衍射等多种方法对催化剂进行表征和热重分析。最后,在水介质中使用环境友好且可回收的MgFe 2 O 4 @Tris 纳米催化剂开发了一种经济有效的吡啶二嘧啶合成方法。为了合成吡啶二嘧啶,以醛衍生物、巴比妥酸和乙酸铵为底物,在室温下进行四组分反应。该催化剂具有催化活性高、收率高、反应时间短、使用环境友好溶剂、易于磁分离以及催化剂可重复利用等优点。