Au@zirconium-phosphonate nanoparticles as an effective catalytic system for the chemoselective and switchable reduction of nitroarenes

Zirconium phosphate bearing aminoethyl groups on the layer surface, ZP(AEP), was used to immobilize AuNPs. The gold-based catalyst proved its high efficiency for the chemoselective reduction of nitroarenes under both batch and flow conditions by using NaBH4 as a reducing agent.

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Loss and Flow Path Studies on Centrifugal Compressors—Part II

Journal of Engineering for Power ◽

10.1115/1.3445353 ◽

1970 ◽

Vol 92 (3) ◽

pp. 287-300 ◽

Cited By ~ 3

Author(s):

O. E. Balje´

Keyword(s):

Boundary Layer ◽

High Efficiency ◽

Flow Path ◽

Flow Conditions ◽

Centrifugal Compressors ◽

Mixed Flow ◽

Path Design ◽

Balanced Flow ◽

Efficiency Data ◽

Rotor Flow

The flow conditions in a mixed flow rotor are investigated for a “pressure balanced” flow path design. Boundary layer arguments are applied to calculate the losses in the rotor as well as in the subsequent diffuser section. The resulting efficiency data imply a comparatively high efficiency potential for mixed flow compressors with multiple cascaded components, designed on the premise of a “pressure balanced” rotor flow path.

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Bis-NHC–Ag/Pd(OAc)2 Catalytic System Catalyzed Transfer Hydrogenation Reaction

Catalysts ◽

10.3390/catal11010008 ◽

2020 ◽

Vol 11 (1) ◽

pp. 8

Author(s):

Hui-Ju Chen ◽

Chien-Cheng Chiu ◽

Tsui Wang ◽

Dong-Sheng Lee ◽

Ta-Jung Lu

Keyword(s):

Functional Groups ◽

Catalytic System ◽

High Efficiency ◽

Aqueous Media ◽

Hydrogenation Reaction ◽

Transfer Hydrogenation ◽

Terminal Alkynes ◽

Wide Range ◽

Transfer Hydrogenation Reaction

The bis-NHC–Ag/Pd(OAc)2 catalytic system (NHC = N-heterocyclic carbene), a combination of bis-NHC–Ag complex and Pd(OAc)2, was found to be a smart catalyst in the Pd-catalyzed transfer hydrogenation of various functionalized arenes and internal/terminal alkynes. The catalytic system demonstrated high efficiency for the reduction of a wide range of various functional groups such as carbonyls, alkynes, olefins, and nitro groups in good to excellent yields and high chemoselectivity for the reduction of functional groups. In addition, the protocol was successfully exploited to stereoselectivity for the transformation of alkynes to alkenes in aqueous media under air. This methodology successfully provided an alternative useful protocol for reducing various functional groups and a simple operational protocol for transfer hydrogenation.

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High-efficiency treatment of benzaldehyde residue using two-stage fluidized-bed/fixed-bed catalytic system

Environmental Technology ◽

10.1080/09593330.2019.1588382 ◽

2019 ◽

Vol 41 (22) ◽

pp. 2898-2906 ◽

Cited By ~ 2

Author(s):

Qing Liu ◽

Rongjie Chen ◽

Maorong Zeng ◽

Zhaoyang Fei ◽

Xian Chen ◽

...

Keyword(s):

Fluidized Bed ◽

Catalytic System ◽

High Efficiency ◽

Fixed Bed ◽

Two Stage

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A one-pot synthesis of benzimidazoles via aerobic oxidative condensation of benzyl alcohols with o-phenylenediamines catalyzed by [MIMPs]+Cl-/NaNO2/TEMPO

Journal of Chemical Research ◽

10.1177/1747519820912163 ◽

2020 ◽

Vol 44 (9-10) ◽

pp. 557-565

Author(s):

Zhenzhen Geng ◽

Hong-yu Zhang ◽

Guohui Yin ◽

Yuecheng Zhang ◽

Jiquan Zhao

Keyword(s):

Ionic Liquid ◽

Catalytic System ◽

Sodium Nitrite ◽

High Efficiency ◽

Oxidative Condensation ◽

Imidazolium Chloride ◽

One Pot ◽

Benzyl Alcohols ◽

One Pot Synthesis ◽

The One

The ionic liquid 1-methyl-3-(3-sulfopropyl)imidazolium chloride ([MIMPs]+Cl-) in combination with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) and sodium nitrite (NaNO2) as a catalytic system demonstrates high efficiency in the one-pot two-step aerobic oxidative condensation of benzyl alcohols with 1,2-phenylenediamines to give benzimidazoles. Various benzimidazoles are obtained in good to excellent yields by this strategy.

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Deoxygenation of carbonyl compounds using an alcohol as an efficient reducing agent catalyzed by oxo-rhenium complexes

Green Chemistry ◽

10.1039/c5gc02777b ◽

2016 ◽

Vol 18 (9) ◽

pp. 2675-2681 ◽

Cited By ~ 15

Author(s):

Joana R. Bernardo ◽

Ana C. Fernandes

Keyword(s):

Catalytic System ◽

Carbonyl Compounds ◽

Reducing Agent ◽

Rhenium Complexes

The catalytic system 3-pentanol/ReOCl3(SMe2)(OPPh3) was very efficient for the deoxygenation of carbonyl compounds.

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A catalytic system with high efficiency and recyclability based on Suzuki and Heck reaction in aqueous admicellar medium

Applied Organometallic Chemistry ◽

10.1002/aoc.5495 ◽

2020 ◽

Vol 34 (4) ◽

Author(s):

Hao Zhang ◽

Ji‐Hua Zhu ◽

Fei Hou ◽

Zheng‐Jun Quan ◽

Xi‐Cun Wang

Keyword(s):

Catalytic System ◽

Heck Reaction ◽

High Efficiency

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Thermoregulated Aqueous Biphasic Catalysis of Sonogashira Reactions

Australian Journal of Chemistry ◽

10.1071/ch15123 ◽

2015 ◽

Vol 68 (10) ◽

pp. 1614 ◽

Cited By ~ 2

Author(s):

Xiaohua Zhao ◽

Xiang Liu ◽

Ming Lu

Keyword(s):

Catalytic System ◽

Catalytic Reaction ◽

High Efficiency ◽

The Novel ◽

Biphasic Catalysis ◽

Co Catalyst ◽

Highly Efficient ◽

Water Based ◽

Aqueous Biphasic ◽

Sonogashira Reactions

A water-based thermoregulated system for Pd-catalyzed Sonogashira reactions is presented, which allows for not only a highly efficient homogeneous catalytic reaction, but also an easy separation/recovery of the catalyst. The novel catalytic system exhibits high efficiency and excellent reusability. In addition, the Sonogashira reactions are performed with Pd(OAc)2 without a copper co-catalyst.

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Site-selective Amide Functionalization by Catalytic Azoline Engrafting

10.26434/chemrxiv-2021-r590w ◽

2021 ◽

Author(s):

Wyatt Powell ◽

Garrett Evenson ◽

Maciej Walczak

Keyword(s):

Natural Products ◽

Catalytic System ◽

High Selectivity ◽

High Efficiency ◽

Unmet Need ◽

Direct Conversion ◽

Amide Group ◽

Site Selective ◽

Selection Of ◽

General Method

Amide activation is a challenging transformation due to the stabilizing effect of the amide group. While enzymes can be considered as prototypical systems that have evolved to achieve high selectivity and specificity, small-molecule catalysts that functionalize the amide group may accommodate a much larger selection of substrates but currently re-main scarce. Here, by combining the desired features from both catalytic regimes we designed an artificial cyclodehy-dratase, a catalytic system for site-selective modification of peptides and natural products by engrafting heterocyclic into their scaffolds. The catalytic system features molybdenum(VI) center that was decorated with a sterically congest-ed tripod ligand. The optimized catalyst can introduce azolines into small molecules, natural products, and oligopeptides with high efficiency and minimal waste. We further demonstrate the utility of the new protocol in direct func-tionalization of a single amide group in the presence of up to seven other chemically similar positions, and direct conversion into amines and thioamides. This new mechanistic paradigm may address an unmet need for a general method for selective and sustainable functionalization of peptides and natural products.

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On-Chip Construction of Multilayered Hydrogel Microtubes for Engineered Vascular-Like Microstructures

Micromachines ◽

10.3390/mi10120840 ◽

2019 ◽

Vol 10 (12) ◽

pp. 840 ◽

Cited By ~ 4

Author(s):

Tao Yue ◽

Na Liu ◽

Yuanyuan Liu ◽

Yan Peng ◽

Shaorong Xie ◽

...

Keyword(s):

Microfluidic Device ◽

Efficient Method ◽

High Efficiency ◽

Flow Conditions ◽

Artificial Blood ◽

Assembly Method ◽

Artificial Blood Vessels ◽

Direct Fabrication ◽

Potential Applications ◽

On Chip

Multilayered and multicellular structures are indispensable for constructing functional artificial tissues. Engineered vascular-like microstructures with multiple layers are promising structures to be functionalized as artificial blood vessels. In this paper, we present an efficient method to construct multilayer microtubes embedding different microstructures based on direct fabrication and assembly inside a microfluidic device. This four-layer microfluidic device has two separate inlets for fabricating various microstructures. We have achieved alternating-layered microtubes by controlling the fabrication, flow, and assembly time of each microstructure, and as well, double-layered microtubes have been built by a two-step assembly method. Modifications of both the inner and outer layers was successfully demonstrated, and the flow conditions during the on-chip assembly were evaluated and optimized. Each microtube was successfully constructed within several minutes, showing the potential applications of the presented method for building engineered vascular-like microstructures with high efficiency.

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