21881-54-9Relevant academic research and scientific papers
Potential applications of Zr-KIT-5: Hantzsch reaction, Meerwein-Ponndorf-Verley (MPV) reduction of 4-tert-butylcyclohexanone, and Prins reaction of citronellal
Srinivasan, Vinju Vasudevan,Ranoux, Adeline,Maheswari, Rajamanickam,Hanefeld, Ulf,Ramanathan, Anand,Subramaniam, Bala
, p. 2399 - 2408 (2016)
The acidity of Zr-incorporated large pore cubic mesoporous silicate, KIT-5, with Fm3m symmetry was explored as catalyst in the Hantzsch reaction for preparation of 1,4-dihydropyridine (DHP) derivatives, Meerwein-Ponndorf-Verley (MPV) reduction of 4-tert-b
Self-assembled hybrid molybdenum phosphonate porous nanomaterials and their catalytic activity for the synthesis of benzimidazoles
Pramanik, Malay,Bhaumik, Asim
, p. 2577 - 2586 (2014)
A new porous organic-inorganic hybrid molybdenum phosphonate nanomaterial (HMoP-1) was synthesized through the reaction of benzene-1,3,5-triphosphonic acid and molybdenum(V) chloride under hydrothermal conditions in the absence of any structure-directing
Sulfonamide-functionalized covalent organic framework (COF-SO3H): an efficient heterogeneous acidic catalyst for the one-pot preparation of polyhydroquinoline and 1,4-dihydropyridine derivatives
Farsi, Razieh,Mohammadi, Mohammad Kazem,Saghanezhad, Seyyed Jafar
, p. 1161 - 1179 (2020/11/18)
Herein, we report the sulfonamide-functionalized covalent organic framework (COF-SO3H) prepared from melamine and terephthalaldehyde and subsequent sulfonation, as an acidic porous catalyst for the one-pot preparation of polyhydroquinoline and
One-pot synthesis of 1,4-dihydropyridine derivatives using the Fe2ZnAl2O7 catalyzed Hantzsch three-component reaction
Zargarzadeh, Reza,Akbari Dilmaghani, Karim,Nikoo, Abbas
, p. 1310 - 1316 (2021/02/16)
A facile, low-cost, and effective one-pot method was developed for the synthesis of 1,4-dihydropyridine derivatives with high yields through the three-component reaction of ammonium acetate, ethyl acetoacetate, and aromatic aldehydes using Fe2ZnAl2O7 as catalyst. The reaction was conducted at 70–80°C temperature under solvent free conditions. The developed method had some great advantages, including safe and clean reaction conditions, high to excellent product yields, short reaction time, and a novel and powerful heterogeneous catalyst. The developed heterogeneous solid catalyst had high efficiency and reusability in one-pot multi-component syntheses such that it was easily reused four to five times without significant loss in efficiency and product yield. The catalyst was characterized by scanning Electron Microscopy (SEM)/energy-dispersive X-ray spectroscopy (EDS) and X-ray diffraction techniques. N2 sorption isotherms of the prepared nanocomposite exhibited surface area 2.1313E+01 m2/g and total pore volume of 3.0957E-02 cm3/g. Substituted dihydropyridine derivatives were characterized and confirmed using 1H NMR and 13C NMR, and elemental spectral data.
Dual solvent-catalyst role of deep eutectic solvents in Hantzsch dihydropyridine synthesis
Shaibuna,Sreekumar
supporting information, p. 1742 - 1753 (2021/04/09)
Deep eutectic solvents are a class of new generation green solvents formed from two or more components, which furnish a new homogeneous liquid phase with lower melting point than the individual components. Here, for the first time, dual role of DES as cat
Boosting the catalytic performance of manganese (III)-porphyrin complex MnTSPP for facile one-pot green synthesis of 1,4-dihydropyridine derivatives under mild conditions
Ali El-Remaily, Mahmoud Abd El Aleem Ali,Hamad, Hesham A.,Soliman, Ahmed M. M.,Elhady, Omar M.
, (2021/03/26)
In this study, the metal complex (5,10,15,20-tetrakis-(4-sulfonatophenyl)-porphyrin manganese (III) chloride; denoted as MnTSPP) represents a promising efficient and reusable heterogeneous solid catalyst for facile and highly efficient one-pot synthesis of 1,4 dihydropyridine derivatives via three-component condensation reaction of aromatic aldehyde, ethyl acetoacetate, and ammonium acetate under green and mild reaction conditions. The simple operation, short reaction time (15 min), and the high efficiency (99%) are the special advantage of this protocol. Furthermore, the green aspects of this synthetic protocol were more studied by examination of the reusability of MnTSPP for four consecutive cycles without a significant loss of catalytic activity. Remarkably, the new synthesis presented advantages in terms of safety, commercially available catalyst, simplicity, stability, mild conditions, short reaction time, and excellent yields, using a mixture of H2O and C2H5OH environmental-friendly solvent, operationally facile, wide tolerance of starting materials, and excellent recoverable of the catalyst.
Ferric Sulfasalazine Sulfa Drug Complex Supported on Cobalt Ferrite Cellulose; Evaluation of Its Activity in MCRs
Rostamizadeh, Shahnaz,Daneshfar, Zahra,Khazaei, Ali
, p. 2091 - 2114 (2020/01/31)
Abstract: The green and nano catalyst was simply prepared through the reaction of ferric sulfasalazine with nanomaterial CoFe2O4-cellulose as a magnetic biopolymer surface. This novel heterogeneous organometallic catalyst was charact
Green synthesis and characterization of novel Mn-MOFs with catalytic and antibacterial potentials
Aryanejad, Sima,Bagherzade, Ghodsieh,Moudi, Maryam
, p. 1508 - 1516 (2020/02/06)
This study focused on the synthesis of a new manganese-based metal-organic framework and the investigation of its application aspects. A Mn-MOF nanostructure, namely UoB-4, was prepared using a Schiff base organic linker (H2bbda: 4,4′-[benzene-
CoFe2O4@SiO2-NH2-CoII NPs catalyzed Hantzsch reaction as an efficient, reusable catalyst for the facile, green, one-pot synthesis of novel functionalized 1,4-dihydropyridine derivatives
Allahresani, Ali,Mohammadpour Sangani, Mehri,Nasseri, Mohammad Ali
, (2020/07/06)
A magnetically heterogeneous CoFe2O4@SiO2-NH2-CoII nanoparticle was synthesized by the immobilization of Co (II) complex onto CoFe2O4@SiO2 nanoparticles, and the heterogeneous magnetic nanocatalyst was characterized by XRD, TEM, TGA, EDX, and FT-IR techniques. Then, the green and reusable method was introduced for a multicomponent synthesis of 1,4-dihydropyridine derivatives via Hantszch reaction. The synthesis of 1,4-dihydropyridine derivatives was proceeded by the reaction of aldehyde, ethyl acetoacetate, and ammonium acetate in the presence of this magnetic nanocatalyst in EtOH/Water (1:1). Simple work-up, short reaction times, excellent yields (60–96percent) as well as green solvent are some advantages of this novel approach, and the corresponding products were purified with no need for chromatographic separation.
Green synthesis of benzimidazoloquinazolines and 1,4-dihydropyridines using magnetic cyanoguanidine-modified chitosan as an efficient heterogeneous nanocatalyst under various conditions
Javanmiri, Kaveh,Karimian, Ramin
, p. 199 - 212 (2020/01/31)
Abstract: In the present study, we demonstrated the synthesis of magnetic cyanoguanidine-modified chitosan (MCGC) as an efficient and green retrievable heterogeneous nanocatalyst for one-pot three-component synthesis of benzimidazoloquinazolines (from 2-aminobenzimidazole, aromatic aldehydes, and dimedone) and 1,4-dihydropyridines (via Hantzsch-type condensation of ethyl acetoacetate, aromatic aldehydes, and ammonium acetate) under the ultrasonic irradiation and reflux conditions. The structure of the catalyst was fully confirmed using Fourier transform infrared spectroscopy, vibrating sample magnetometer, field emission scanning electron microscopy, energy dispersive spectroscopy, and thermogravimetric analysis. Increased amount of amino groups that are generated by modifying the surface of chitosan with cyanoguanidine as well as presence of hydroxyl groups determined the catalytic activity of MCGC. Furthermore, as experimental results confirmed, the ultrasonic-promoted reactions gave the better results in terms of reaction time, yield, and purity of isolated products. Cost effectiveness, mild conditions, low catalyst loading, convenient work-up, and ecofriendly solvent are some of the remarkable advantages of this protocol.
