Hexamethylenetetramine-based ionic liquid/MIL-101(Cr) metal–organic framework composite: a novel and versatile tool for the preparation of pyrido[2,3-<i>d</i>:5,6-<i>d</i>′]dipyrimidines
作者:Boshra Mirhosseini-Eshkevari、Mohammad Ali Ghasemzadeh、Manzarbanoo Esnaashari、Saeed Taghvaei Ganjali
DOI:10.1039/d0ra09054a
日期:——
hexamethylenetetramine-based ionic liquid immobilized on the MIL-101(Cr) metal–organic framework was successfully synthesized as a novel, efficient, and recoverable catalyst for the synthesis of pyrido[2,3-d:5,6-d′]dipyrimidine derivatives via the reaction of barbituric acid derivatives, 6-aminouracil/6-amino-1,3-dimethyl uracil, and aromatic aldehydes under solvent-free conditions. Characterization of the catalyst
在本文中,成功合成了一种固定在MIL-101(Cr)金属有机骨架上的六亚甲基四胺基离子液体,作为一种新型、高效、可回收的催化剂,用于合成吡啶并[2,3- d :5, 6- d ']二嘧啶衍生物是由巴比妥酸衍生物、6-氨基尿嘧啶/6-氨基-1,3-二甲基尿嘧啶和芳香醛在无溶剂条件下反应得到。采用场发射扫描电子显微镜(FE-SEM)、能量色散X射线光谱(EDS)、X射线衍射(XRD)、热重分析(TGA)、傅里叶变换等多种方法对催化剂进行表征红外分光光度法 (FT-IR) 和 Brunauer-Emmett-Teller (BET)。该方案的主要特点是转化效率高、反应时间短、收率优异、产物分离容易、条件温和以及有机催化剂潜在的高可回收性。
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。
DIPEAc promoted one-pot synthesis of dihydropyrido[2,3-<i>d</i>:6,5-<i>d</i>′]dipyrimidinetetraone and pyrimido[4,5-<i>d</i>]pyrimidine derivatives as potent tyrosinase inhibitors and anticancer agents: <i>in vitro</i> screening, molecular docking and ADMET predictions
作者:Manisha R. Bhosle、Lalit D. Khillare、Jyotirling R. Mali、Aniket P. Sarkate、Deepak K. Lokwani、Shailee V. Tiwari
DOI:10.1039/c8nj04622k
日期:——
The present method provides a wide scope and quick access to dihydropyrido[2,3-d:6,5-d′]dipyrimidinetetraone and pyrimido[4,5-d]pyrimidinederivatives in good to excellent isolated yields from a one-pot three-component reaction of aldehydes, barbituric acid and ammonium acetate/urea in DIPEAc at room temperature. Major advantages of the present methodology are: use of green solvent, short reaction
本方法提供了广泛的范围,可快速获得二氢吡啶并[2,3- d:6,5- d ']二嘧啶四酮和嘧啶并[4,5- d ]嘧啶衍生物,从一锅法三中分离得到的产率好至极好。室温下,醛,巴比妥酸和乙酸铵/脲在DIPEAc中进行高组分反应。本方法的主要优点是:使用绿色溶剂,反应时间短,无催化剂,与多种底物相容,易于回收,反应介质可重复使用,以及DIPEAc作为替代溶剂和催化剂。对所有合成的化合物(3a–k)和(4a–g)进行了体外评估抗癌和酪氨酸酶的抑制活性。对MCF-7,HeLa和A-549癌细胞系进行了合成化合物的体外抗癌筛选,并且3f,3h和3i显示出良好的活性。化合物3a,3c,3f和3i对SK-MEL-2显示出良好的体外抗癌活性。还对合成的化合物在非致瘤性MCF-10A细胞株上进行了测试,发现对它们的癌细胞具有选择性。化合物3f的IC 50浓度与对照细胞相比,MCF-7癌细胞系中存在典型的形态
Efficient sonochemical protocol for the facile synthesis of dipyrimido-dihydropyridine and pyrimido[4,5-<i>d</i>]pyrimidines in aqueous<font>β</font>-cyclodextrin
作者:Chandrakant Jadhav、Lalit D. Khillare、Manisha R. Bhosle
DOI:10.1080/00397911.2017.1390685
日期:2018.2.1
ABSTRACT An economical and efficient synthesis of dipyrimido-dihydropyridines and pyrimido[4,5-d]pyrimidines is described using greener and recyclable β-cyclodextrin as a supramolecular catalyst in aqueous medium. The remarkable features of this method are mild reaction conditions, short reaction times, easy workup procedure, recyclability of the catalyst, and excellent yields of the products. The
<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。