Molecules that contain polyhydroquinoline structural scaffolds are N‐containing heterocycles which of great interest to organic chemists and biologists. Polyhydroquinoline known as calcium channel blockers have emerged one the most important class drugs used for treatment cardiovascular Alzheimer's diseases. Besides, recovery reusability catalysts issues be discussed in modern catalysis research especially synthesis. The concept magnetically recoverable has been rapidly developed recent...

The synthesis of five- and six-membered oxygen- nitrogen-containing heterocycles has been regarded as the most fundamental issue in organic chemistry chemical industry because they are used producing high-value products. In this study, an efficient, economic, sustainable, green protocol for multicomponent developed. one-pot direct Knoevenagel condensation-Michael addition-cyclization sequences transformation aromatic aldehydes, malononitrile, 4-hydroxycoumarin or phthalhydrazide generate...

The present work aims at preparing the EDTA–Zn(II) complex─supported on amine-functionalized MIL-101(Cr) MOF─as a new and effective heterogenized catalyst. optimization of hydrothermal process shows that 120 °C is best condition to grow MIL-101(Cr)–NH2 MOF crystals. Moreover, regarding use postsynthetic modification (PSM) method, hexadentate EDTA was grafted this support via simple aminolysis before further coordinating it with Zn ions create corresponding Zn(II) catalytic complex. activity...

This study introduces a novel method for functionalizing natural asphalt, presenting new opportunities upgrading asphaltenes from road to catalyst. The process utilizes metal-free sonobromination technique in acetic acid incorporate carbon-halogen substituents onto asphalt. These sites are then targeted by nucleophilic substitution with diethanolamine, followed complexation Pd(0) create unique palladium complex grafted stabilized serves as heterogeneous and recoverable catalyst the Suzuki...

An<sc>l</sc>-methionine–Pd complex was covalently immobilized on the surface of hercynite (FeAl₂O₄) MNPs, and its catalytic properties were studied in C–C coupling reactions.

Diaryl sulfides play an important role in the synthesis of natural products, pharmaceutically and biologically molecules. The metal catalysts are powerful tools for C–S bonds formation. Despite utility palladium-catalyzed carbon–sulfur bond formation, copper complexes fascinating this transformation because is less toxic inexpensive than palladium. In recent times, a large number protocols using various to perform cross-coupling reactions leading diaryl have been described. review, we...

A boehmite@tryptophan‐Pd nanoparticulate catalyst was prepared by a simple, fast and convenient route. The nanomaterial characterized using various techniques employed as thermally stable for Heck, Stille Suzuki cross‐coupling reactions. Optimized conditions these reactions are described. could be isolated, post‐reaction, simple filtration recycled several consecutive cycles without notable change in its activity.

CoFe₂O₄@Pr as highly efficient and reusable heterogeneous catalyst prepared by a simple procedure for the synthesis of polyhydroquinoline 2,3-dihydroquinazolin-4(1<italic>H</italic>)-one derivatives.

Abstract A three-dimensional walnut-like Zn-based MOF microsphere system was designed and synthesized via hydrothermal reaction of zinc salt with 4,6-diamino-2-pyrimidinethiol as a tridentate ligand. Besides, Zn ions were coordinated to the functional groups ligand give novel Zn-MOF material. Afterward, resultant material thoroughly characterized using various analysis physico-chemical methods; including, FT-IR, XRD, TGA, EDX, X-ray mapping, SEM, TEM, BET analysis. The microspheres utilized...

Herein, we report the synthesis of hercynite@sulfuric acid as a novel nanomagnetic solid catalyst, containing sulfuric catalytic sites on surface hercynite MNPs support.

Abstract A highly stable and efficient heterogeneous catalyst was successfully prepared by hydrothermal reaction of Zinc nitrate with citric acid. To produce a novel Zn‐based MOF catalyst, Zn ions were coordinated the ligand functional groups that can be regarded as an alpha‐hydroxy acid containing three carboxylic acids (COOH) one hydroxyl (OH) group attached to three‐carbon skeleton. It found Zn‐CA‐MOFs compound participate in synthesis 5‐substituted 1H‐tetrazole pyranopyrazole molecules,...

Herein, we delignated the synthesis of a novel inorganic sulfurous magnetic solid acid catalyst by immobilization an extremely high content sulfuric functionalities on amorphous silica-modified hercynite nanomagnetic core-shell via simple method. Silica (SSA) modified nanocomposite (hercynite@SSA) combines excellent recoverability and stability characteristics (which can be regarded as ferro spinel with Fd3m space group cubic crystal structure) strong Brønsted properties -SO3H groups. This...

In this research, a novel nanomagnetic tetra-azamacrocyclic Schiff base complex of copper(ii) was produced via post-synthetic surface modification an Fe3O4 by silane-coupling agent that contains acetylacetone functionalities at the end its chain. Moreover, target Cu involves tetradentate ligand obtained from template reaction with o-phenylenediamine and Cu(NO3)2·3H2O. Furthermore, prepared nominated as [Fe3O4@TAM-Schiff-base-Cu(II)]. The Fourier-transform infrared (FT-IR) analysis indicates...

Herein, the l-serine-functionalized metal–organic framework nanostructure is obtained via a simple two-step post-synthetic modification strategy. Interesting properties of serine, such as existence both acidic and basic groups, provide amphoteric active sites on UiO-66-NH2 that are not accessible through direct synthesis. In this sense, an excess amount 1,6 hexamethylene diisocyanate primarily used linker to allow conversion nucleophilic groups in isocyanate suitable electrophile group....

Herein, we present a highly efficient dual-functionalized acid–base nanocatalyst, denoted as Fe3O4@GLYMO-HEPES, featuring sulfuric acid and tertiary amines its dual functional components. This catalyst is synthesized through the immobilization of 4-(2-hydroxyethyl)-1-piperazineethanesulfonic (HEPES) source these functionalities onto magnetite (Fe3O4) using 3-glycidoxypropyltriethoxysilane (GLYMO) linker. Characterization studies confirm integrity Fe3O4 core, with GLYMO-HEPES coating...

This study presents the synthesis and characterization of a novel phosphotungstic acid-functionalized hercynite@SiO