Creation of a Highly Active Small Cu‐Based Catalyst Derived from Copper Aluminium Layered Double Hydroxide Supported on α‐Al2O3 for Acceptorless Alcohol Dehydrogenation DOI Open Access

Febi Yusniyanti,

Takayoshi Hara,

Kohei Makishima

et al.

Chemistry - An Asian Journal, Journal Year: 2023, Volume and Issue: 18(21)

Published: Sept. 27, 2023

A highly dispersed carbonate-intercalated Cu2+ -Al3+ layered double hydroxide (CuAl LDH) was created on an unreactive α-Al2 O3 surface LDH@α-Al2 ) via a simple coprecipitation method of and Al3+ under alkaline conditions in the presence . reducible CuO nanoparticles generated, accompanied by formation CuAl2 O4 (CuAlO@α-Al2 after calcination at 1073 K air, as confirmed powder X-ray diffraction (XRD) Cu K-edge absorption near edge structure (XANES). The structural changes during progressive heating process were monitored using in-situ temperature-programmed synchrotron XRD (tp-SXRD). CuAl completely disappeared 473 K, or phases began to appear 823 1023 respectively. Our synthesised CuAlO@α-Al2 catalyst active for acceptorless dehydrogenation benzylic, aliphatic, cyclic aliphatic alcohols; TON based amount increased 163 from 3.3 unsupported CuAlO 1-phenylethanol dehydrogenation. results suggested that Cu0 obtained reduction matrix reaction without separate procedure acted catalytically species.

Language: Английский

The surface modification of the silica-coated magnetic nanoparticles and their application in molecular diagnostics of virus infection DOI Creative Commons
A. Zeleňáková, Vladimı́r Zeleňák, Eva Beňová

et al.

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: June 23, 2024

The study presents a series of examples magnetic nanoparticle systems designed for the diagnosis viral diseases. In this interdisciplinary work, we describe one most comprehensive synthetic approaches preparation and functionalization smart rapid effective RT-PCR diagnostics isolation RNA. Twelve different organic ligands inorganic porous silica were used surface Fe3O4 core to increase number active centres efficient RNA binding from human swab samples. Different with common beads characterized by HRTEM, SEM, FT-IR, XRD, XPS measurements. We demonstrate application fundamental models modified fit experimental zero-field cooling magnetization data. discuss influence shell parameters (morphology, thickness, ligands) on overall performance systems. prepared nanoparticles tested tissue samples infected hepatitis E virus-HEV biofluid SARS-CoV-2 positive patients. efficiency was quantified RT-qPCR method.

Language: Английский

Citations

6
Recent Advances in the Use of 2‐Aminobenzyl Alcohols in the Synthesis of Quinolines, Quinazolines and Other N‐Heterocycles DOI
Fatemeh Doraghi,

Farzad Gilaninezhad,

Somaye Karimian

et al.

Advanced Synthesis & Catalysis, Journal Year: 2024, Volume and Issue: 366(10), P. 2142 - 2164

Published: Jan. 17, 2024

Abstract N‐Heterocyclic compounds, in particular, quinolines and quinazolines are frequently used medicinal chemistry. Therefore, the direct clean synthesis of these valuable scaffolds has been a great interest for many years. 2‐Aminobenzyl alcohols as an alternative reactant instead unstable expensive 2‐aminobenzaldehydes can be construction N‐fused heterocycles including quinolines, quinazolines, oxazines, thiazines, selenazines, imidazoles, diazepines, etc. In this review article, we have discussed recent developments use 2‐aminobenzyl diverse heterocycles.

Language: Английский

Citations

4
Facile Synthesis of 2-Substituted Quinazolines via Ruthenium(II)-Catalyzed Acceptorless Dehydrogenative Coupling DOI

Shulei Wu,

Qianqian Lei,

Zaoduan Wu

et al.

Current Organic Chemistry, Journal Year: 2024, Volume and Issue: 28(4), P. 305 - 318

Published: Feb. 1, 2024

Abstract:: This study aims to develop a practical and facile one-pot synthesis of 2- substituted quinazolines. Using commercially available structurally simple ruthenium( II) complex as the catalyst synthesize series quinazoline derivatives via acceptorless dehydrogenative coupling. The mechanism this reaction was explored by control DFT calculation. protocol offers access diverse array (52 examples) in moderate excellent yields (29%-98%). In summary, we have developed an efficient ruthenium (II)-catalyzed ADC under air atmosphere. only produces hydrogen water by-products, serving sustainable atom-efficient synthetic approach.

Language: Английский

Citations

1
Single atom catalysts enable quasi-homogeneous synthesis of quinazoline DOI

Liya Jiang,

Jian Ku Shang, Xianyun Peng

et al.

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 474, P. 145651 - 145651

Published: Aug. 25, 2023

Language: Английский

Citations

3
Copper-catalyzed synthesis of quinazolines via cascade cyclization/hydrodehalogenation DOI
Peng Ma, Yuhang Wang, Jianhui Wang

et al.

New Journal of Chemistry, Journal Year: 2023, Volume and Issue: 47(19), P. 9377 - 9382

Published: Jan. 1, 2023

We report a Cu( i )-catalyzed synthesis of quinazolines via cascade cyclization/hydrodehalogenation by using acetamide as nitrogen source and H 2 O hydrogen source.

Language: Английский

Citations

3
Interweaved needle‐shaped α‐Ni(OH)2 nanoparticles adorned on graphene oxide: A new class of heterogeneous catalysts for α‐alkylation of ketones and synthesis of azines DOI
Shelly Kujur, Shruti Verma, Akash Kumar

et al.

Applied Organometallic Chemistry, Journal Year: 2023, Volume and Issue: 38(2)

Published: Dec. 13, 2023

A simple approach for synthesizing needle‐shaped α ‐Ni(OH) 2 nanoparticles adorned on graphene oxide, ‐GO, is described. The nanocomposite was isolated as an air‐stable black powder and characterized by various instrumental techniques. interweaved morphology the average particle diameter ~7 nm of were ascertained Field Emission Scanning Electron Microscopy (FESEM) Transmission (TEM) analysis, respectively. catalytic potential scrutinized in synthesis monosubstituted ketones via a hydrogen autotransfer strategy azines dehydrogenative pathway. products both reactions excellent yields nuclear magnetic resonance (NMR) spectroscopy. ‐GO could be segregated recycled up to five cycles. operational simplicity, broad substrate scope, non‐toxic side products, recyclability, superior catalyst are some remarkable features this protocol.

Language: Английский

Citations

2
Creation of a Highly Active Small Cu‐Based Catalyst Derived from Copper Aluminium Layered Double Hydroxide Supported on α‐Al2O3 for Acceptorless Alcohol Dehydrogenation DOI Open Access

Febi Yusniyanti,

Takayoshi Hara,

Kohei Makishima

et al.

Chemistry - An Asian Journal, Journal Year: 2023, Volume and Issue: 18(21)

Published: Sept. 27, 2023

A highly dispersed carbonate-intercalated Cu2+ -Al3+ layered double hydroxide (CuAl LDH) was created on an unreactive α-Al2 O3 surface LDH@α-Al2 ) via a simple coprecipitation method of and Al3+ under alkaline conditions in the presence . reducible CuO nanoparticles generated, accompanied by formation CuAl2 O4 (CuAlO@α-Al2 after calcination at 1073 K air, as confirmed powder X-ray diffraction (XRD) Cu K-edge absorption near edge structure (XANES). The structural changes during progressive heating process were monitored using in-situ temperature-programmed synchrotron XRD (tp-SXRD). CuAl completely disappeared 473 K, or phases began to appear 823 1023 respectively. Our synthesised CuAlO@α-Al2 catalyst active for acceptorless dehydrogenation benzylic, aliphatic, cyclic aliphatic alcohols; TON based amount increased 163 from 3.3 unsupported CuAlO 1-phenylethanol dehydrogenation. results suggested that Cu0 obtained reduction matrix reaction without separate procedure acted catalytically species.

Language: Английский

Citations

1