A novel nitrogen-rich phosphinic amide towards flame-retardant, smoke suppression and mechanically strengthened epoxy resins

Polymer Degradation and Stability, Год журнала: 2022, Номер 196, С. 109840 - 109840

Опубликована: Янв. 22, 2022

Язык: Английский

---

A novel cubic Zn‐citric acid‐based MOF as a highly efficient and reusable catalyst for the synthesis of pyranopyrazoles and 5‐substituted 1H‐tetrazoles

Applied Organometallic Chemistry, Год журнала: 2022, Номер 36(6)

Опубликована: Март 1, 2022

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, selectively efficiently high yield short period time. As presented, demonstrates excellent reusability stability recycled up five times without significant loss reactivity. Heterogeneity analysis showed no leaching active species occurred during recycling process Zn‐CA‐MOFs.

Язык: Английский

---

Nanomagnetic tetraaza (N₄ donor) macrocyclic Schiff base complex of copper(ii): synthesis, characterizations, and its catalytic application in Click reactions

Nanoscale Advances, Год журнала: 2023, Номер 5(23), С. 6594 - 6605

Опубликована: Янв. 1, 2023

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 presence Schiff-base-Cu in catalyst. X-ray spectroscopy (EDS) TGA reveal approximately 6-7% catalyst comprises hydrocarbon moieties. scanning electron microscope (SEM) transmission microscopy (TEM) images demonstrate uniformly shaped particles, nearly spherical nature, sizes ranging 9 to 18 nm. [Fe3O4@TAM-Schiff-base-Cu(II)] applied for click synthesis diverse range 5-substituted-1H-tetrazoles PEG-400 green medium. Regarding electrical properties Cu(ii) complex, tetra-aza (N4 donor) macrocyclic N-rich reasonable - leading excellent capacity catalyze these organic transformations. Finally, high magnetization value (44.92 emu g-1) enables recycling least four times without compromising catalytic efficiency.

Язык: Английский

---

[ZrFe2O4@SiO2–N–(TMSP)–ASP–Pd(0)] Complex: Synthesis, characterizations, and its application as a nanomagnetic catalyst in cross-coupling and click reactions

Journal of Molecular Structure, Год журнала: 2023, Номер 1292, С. 136115 - 136115

Опубликована: Июнь 29, 2023

Язык: Английский

---

Chitosan-supported metal nanocatalysts for the reduction of nitroaromatics

International Journal of Biological Macromolecules, Год журнала: 2023, Номер 239, С. 124135 - 124135

Опубликована: Март 23, 2023

Язык: Английский

---

A novel Cu complex coated on hercynite magnetic nanoparticles as an efficient and recoverable nanocatalyst for the selective synthesis of tetrazoles

Journal of Nanoparticle Research, Год журнала: 2024, Номер 26(1)

Опубликована: Янв. 1, 2024

Язык: Английский

---

Green Methodologies for Tetrazole Synthesis from Different Starting Materials: A Recent Update

Current Organic Chemistry, Год журнала: 2024, Номер 28(2), С. 134 - 160

Опубликована: Янв. 1, 2024

Abstract: Tetrazole is a most versatile pharmacophore of which more than twenty FDAapproved drugs have been marketed globally for the management various diseases. In spite many remarkable and consistent efforts having made by chemists towards development greener sustainable strategies synthesis tetrazole derivatives, this approach still needs attention. The present review focuses on green synthetic preparation derivatives from different starting materials such as nitrile, isonitrile, carbonyl, amine, amide, oxime terminal alkyne functions. mechanism substrates discussed. addition to this, four component Ugi-azide reaction also described. Of note, articles exploited several water-mediated solvent-free methodologies synthesis. important key features were pinpointing in each scheme provides excellent guide those searching selective procedure achieve desired transformation. This seeks timely account (2011-2023) splendid array ecofriendly procedures known today materials. rational enlighten recent advancements substrates.

Язык: Английский

---

Tetrazole derivatives in the management of neurological disorders: Recent advances on synthesis and pharmacological aspects

European Journal of Medicinal Chemistry, Год журнала: 2024, Номер 271, С. 116388 - 116388

Опубликована: Апрель 9, 2024

Язык: Английский

---

Catalytic Tetrazole Synthesis via [3+2] Cycloaddition of NaN₃ to Organonitriles Promoted by Co(II)-complex: Isolation and Characterization of a Co(II)-diazido Intermediate

ACS Omega, Год журнала: 2024, Номер 9(19), С. 21626 - 21636

Опубликована: Апрель 29, 2024

The [3+2] cycloaddition of sodium azide to nitriles give 5-substituted 1H-tetrazoles is efficiently catalyzed by a Cobalt(II) complex (

Язык: Английский

---

Database mining and first-principles assessment of organic proton-transfer ferroelectrics

Physical Review Materials, Год журнала: 2024, Номер 8(5)

Опубликована: Май 20, 2024

In organic proton-transfer ferroelectrics (OPTFe), molecules are linked to form hydrogen-bonded networks, and proton transfer (PT) between is the dominant mechanism of ferroelectric switching. The fast-switching frequencies OPTFes make them attractive alternatives conventional ceramic ferroelectrics, which contain rare and/or toxic elements require high processing temperatures. this study, we mined Cambridge Structural Database (CSD) for potential OPTFes, uncovering most previously reported ones, both tautomeric compounds acid-base salts, in addition 12 new compounds, nine were salts. identification PT salts highlights a avenue engineering novel OPTFes. CSD mining was based on identifying polar crystal structures with pseudoinversion symmetry viable paths. spontaneous polarization ${\mathbit{P}}_{\mathrm{s}}$ barriers ${U}_{\mathrm{PT}}$ calculated selection using density-functional theory.

Язык: Английский

---