Post-synthetic modification of UIO-66-NH2 as a highly efficient and recyclable nanocatalyst in the three-component coupling (A3) reaction for the synthesis of propargylamine derivatives

Journal of Organometallic Chemistry, Journal Year: 2023, Volume and Issue: 1002, P. 122903 - 122903

Published: Oct. 5, 2023

Language: Английский

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Green synthesis and characterization of crystalline copper nanoparticles via sodium borohydride reduction towards enhanced gas sensing application

Journal of the Indian Chemical Society, Journal Year: 2024, Volume and Issue: 101(6), P. 101157 - 101157

Published: April 25, 2024

Language: Английский

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Preparation of gold nanoparticles decorated UiO-66-NH2 incorporated epichlorohydrin and cyclodextrin as novel efficient catalyst in cross coupling and carbonylative reactions

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: April 25, 2025

Language: Английский

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Copper-Catalyzed Three-Component Tandem Cyclization for One-Pot Synthesis of Indole-Benzofuran Bis-Heterocycles

The Journal of Organic Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 22, 2024

A one-pot, three-component synthesis of indole-benzofuran bis-heterocycles from terminal alkynes, salicylaldehydes, and indoles has been developed via copper-catalyzed tandem annulation. This catalytic system utilizes readily available starting materials, enabling predictable with broad substrate versatility, excellent regiocontrol, gram-scale amenability. The reaction proceeds a sequential pathway involving A3 coupling, 1,4-conjugate addition, 5-exo-dig cyclization.

Language: Английский

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Fe₃O₄/PANI/CuI as a sustainable heterogeneous nanocatalyst for A³ coupling

Nanoscale Advances, Journal Year: 2024, Volume and Issue: 6(19), P. 4842 - 4851

Published: Jan. 1, 2024

The prepared copper iodide nanoparticles were impregnated on the support of ferrite functionalized with polyaniline, resulting in a magnetically recoverable heterogeneous nanocomposite. activity nanocomposite was investigated synthesis propargylamine derivatives

Language: Английский

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Temperature Induced Monoclinic to Orthorhombic Phase Transition in Protonated ZSM-5 Zeolites with Different Si/Al Ratios: An In-Situ Synchrotron X-ray Powder Diffraction Study

Crystals, Journal Year: 2023, Volume and Issue: 13(6), P. 979 - 979

Published: June 20, 2023

ZSM-5 zeolite is the synthetic counterpart to mutinaite. After thermal activation of as-synthesized form, symmetry lowered monoclinic P21/n. then undergoes a polymorphic displacive phase transition from P21/n orthorhombic Pnma, Pn21a or P212121 space groups, which occurs upon heating. This can be influenced by factors such as type and amount sorbate molecules present in channels. has many applications, including catalyst sorbent various industries, where high stability required. In this study, four zeolites with different Si/Al ratios were investigated synchrotron X-ray powder diffraction at both room temperature conditions determine effects chemical composition on structural response lattice. The results showed that retained their crystallinity features throughout treatment, indicating they could used effective acid catalysts. Distortions framework occur after TPA+ decomposition activation, affecting regeneration efficiency. charge balance achieved formation Brønsted sites, variations bonding geometries are initial ratio.

Language: Английский

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Copper-Based Nanomaterials in C-H Bond Activation Reactions

ACS symposium series, Journal Year: 2024, Volume and Issue: unknown, P. 139 - 152

Published: May 14, 2024

Copper-based nanomaterials have been considered as another sort of heterogeneous catalyst in different chemical conversions. This chapter focuses the most convenient C-H bond activation reactions which were performed within sight copper nanoparticles or copper-based catalyst. The substrate scope and mechanistic pathway discussed. It has also noted that role ligand is crucial preventing aggregation nanoparticles. morphology synthesized catalysts depicted.

Language: Английский

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Green Chemical Synthesis of Cube‐Shaped CuFe₂O₄ Nanoparticles for Use as Magnetically Retrievable Catalysts in A³ Coupling Reactions

Applied Organometallic Chemistry, Journal Year: 2024, Volume and Issue: 39(1)

Published: Oct. 7, 2024

ABSTRACT A 3 coupling reaction is a multicomponent (MCR) involving aryl aldehydes, phenyl acetylenes and amines to synthesize variety of biologically active propargylamine derivatives. Herein, we report the preparation cube‐shaped CuFe 2 O 4 nanoparticles (NPs) via hydrothermal method in presence Lantana camara flower (LCF) extract use them as catalysts X‐ray diffraction study confirms formation NPs with cubic spinel structures. In LCF extract, are formed predominantly irrespective type alkali used hydrolyzing agent. However, mixture nearly spherical particles has been absence additives. The synthesized exhibit superparamagnetic behaviour magnetically ordered. excellent catalytic activity between benzaldehyde, piperidine phenylacetylene give yield 90% under optimum conditions. catalyst highly stable retrievable facilitating reusability for up five cycles without considerable loss activity. protocol suitable synthesis diverse range derivatives moderate yield.

Language: Английский

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Fabrication of CuNPs Using Schiff Base Ligand and Their Catalytic Reduction of Pharmaceutical Drugs, Fluorescence Selective Detection of Cd2+, Antimicrobial, and Antioxidant Activities

Journal of Fluorescence, Journal Year: 2023, Volume and Issue: 34(3), P. 1307 - 1318

Published: Aug. 2, 2023

Language: Английский

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