scholarly journals Selective hydroxylation of aryl iodides to produce phenols under mild conditions using a supported copper catalyst

RSC Advances ◽  
2021 ◽  
Vol 11 (41) ◽  
pp. 25348-25353
Author(s):  
Leiduan Hao ◽  
Anika Auni ◽  
Guodong Ding ◽  
Xiaoyu Li ◽  
Haiping Xu ◽  
...  
Keyword(s):  
Copper Catalyst ◽  
Mild Conditions ◽  
Highly Efficient ◽  
Aryl Iodides ◽  
Cu Catalyst ◽  
Supported Copper Catalyst ◽  
Selective Hydroxylation

Atomically dispersed Cu catalyst was designed for highly efficient hydroxylation of aryl iodides under mild conditions.

Highly efficient and practical aerobic oxidation of alcohols by inorganic-ligand supported copper catalysis

2019 ◽  
Vol 21 (15) ◽  
pp. 4069-4075 ◽  
Author(s):  
Zheyu Wei ◽  
Shi Ru ◽  
Qixin Zhao ◽  
Han Yu ◽  
Gang Zhang ◽  
...  
Keyword(s):  
Copper Catalyst ◽  
Aerobic Oxidation ◽  
Copper Catalysis ◽  
Inorganic Ligand ◽  
Highly Efficient ◽  
Oxidation Of Alcohols ◽  
Supported Copper Catalyst ◽  
Excellent Selectivity

An inorganic-ligand supported copper catalyst which can effectively catalyze the aerobic oxidation of alcohols to afford aldehydes or ketones with excellent selectivity and yields.

A Highly Efficient Heterogeneous Copper-Catalyzed Oxidative Cyclization of Benzylamines and 1,3-Dicarbonyl Compounds To Give Trisubstituted Oxazoles

Synthesis ◽  
2019 ◽  
Vol 51 (16) ◽  
pp. 3091-3100
Author(s):  
Li Wei ◽  
Shengyong You ◽  
Yuxin Tuo ◽  
Mingzhong Cai
Keyword(s):  
Copper Catalyst ◽  
Oxidative Cyclization ◽  
Dicarbonyl Compounds ◽  
Mild Conditions ◽  
Highly Efficient ◽  
Intermolecular Cyclization ◽  
Step Procedure ◽  
Mcm 41

The heterogeneous copper-catalyzed cascade oxidative cyclization between benzylamines and 1,3-dicarbonyl compounds was achieved by using the 3-(2-aminoethylamino)propyl-functionalized MCM-41-immobilized copper(II) complex [MCM-41-2N-Cu(OAc)2] as catalyst and t-BuOOH (TBHP) as oxidant, with iodine as additive, under mild conditions, yielding a wide variety of 2,4,5-trisubstituted oxazoles in mostly good to excellent yields. This heterogeneous copper catalyst can be facilely prepared via a simple two-step procedure from readily available and inexpensive reagents and exhibits a slightly higher activity than Cu(OAc)2. MCM-41-2N-Cu(OAc)2 is also easy to recover and can be recycled up to eight times with almost consistent activity. The reaction is the first example of heterogeneous copper-catalyzed intermolecular cyclization for the construction of polysubstituted oxazoles.

Efficient Heterogeneous Copper-Catalysed C–Se Coupling of Aryl Iodides with Symmetrical Diselenides towards Unsymmetrical Monoselenides

2018 ◽  
Vol 42 (11) ◽  
pp. 584-588 ◽  
Author(s):  
Ruonan Zhao ◽  
Chenyu Yan ◽  
Yuanyuan Jiang ◽  
Mingzhong Cai
Keyword(s):  
Copper Catalyst ◽  
Significant Loss ◽  
Highly Efficient ◽  
Aryl Iodides ◽  
Reaction Solution ◽  
Simple Filtration ◽  
Neutral Conditions ◽  
Mcm 41

A highly efficient heterogeneous copper(I)-catalysed C–Se coupling of aryl iodides with diaryl diselenides was achieved in dimethylformamide at 110 °C under neutral conditions by using a 10 mol% of bipyridine-functionalised MCM-41-supported copper(I) complex [bpy-MCM-41-CuI] as the catalyst and magnesium as the reductive reagent, yielding a variety of unsymmetrical diaryl selenides in good to excellent yields. This heterogeneous copper catalyst can be easily recovered by a simple filtration of the reaction solution and recycled at least seven times without significant loss of activity.

scholarly journals Highly efficient ethylene production via electrocatalytic hydrogenation of acetylene under mild conditions

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Suheng Wang ◽  
Kelechi Uwakwe ◽  
Liang Yu ◽  
Jinyu Ye ◽  
Yuezhou Zhu ◽  
...  
Keyword(s):  
Ethylene Production ◽  
High Efficiency ◽  
Ambient Pressure ◽  
Industrial Process ◽  
Electrocatalytic Hydrogenation ◽  
Hydrogen Electrode ◽  
Faradaic Efficiency ◽  
Mild Conditions ◽  
Highly Efficient ◽  
Cu Catalyst

AbstractRenewable energy-based electrocatalytic hydrogenation of acetylene to ethylene (E-HAE) under mild conditions is an attractive substitution to the conventional energy-intensive industrial process, but is challenging due to its low Faradaic efficiency caused by competitive hydrogen evolution reaction. Herein, we report a highly efficient and selective E-HAE process at room temperature and ambient pressure over the Cu catalyst. A high Faradaic efficiency of 83.2% for ethylene with a current density of 29 mA cm−2 is reached at −0.6 V vs. the reversible hydrogen electrode. In-situ spectroscopic characterizations combined with first-principles calculations reveal that electron transfer from the Cu surface to adsorbed acetylene induces preferential adsorption and hydrogenation of the acetylene over hydrogen formation, thus enabling a highly selective E-HAE process through the electron-coupled proton transfer mechanism. This work presents a feasible route for high-efficiency ethylene production from E-HAE.

scholarly journals Streamlined construction of peptide macrocycles via palladium-catalyzed intramolecular S-arylation in solution and on DNA

2021 ◽  
Vol 12 (16) ◽  
pp. 5804-5810
Author(s):  
Peng Yang ◽  
Xuan Wang ◽  
Bo Li ◽  
Yixuan Yang ◽  
Jinfeng Yue ◽  
...  
Keyword(s):  
Mild Conditions ◽  
Highly Efficient ◽  
Aryl Iodides ◽  
Palladium Catalyzed

A highly efficient and versatile method for construction of peptide macrocycles via palladium-catalyzed intramolecular S-arylation of alkyl and aryl thiols with aryl iodides under mild conditions is developed.

scholarly journals Nickel-Catalyzed Asymmetric Reductive Cross-Coupling of α-Chloroesters with (Hetero)Aryl Iodides

2021 ◽  
Author(s):  
Travis DeLano ◽  
Sara Dibrell ◽  
Caitlin R. Lacker ◽  
Adam Pancoast ◽  
Kelsey Poremba ◽  
...  
Keyword(s):  
Cross Coupling ◽  
Mild Conditions ◽  
Aryl Iodides ◽  
Reaction Proceeds

An asymmetric reductive cross-coupling of α-chloroesters and (hetero)aryl iodides is reported. This nickel-catalyzed reaction proceeds with a chiral BiOX ligand under mild conditions, affording α-arylesters in good yields and enantioselectivities....

Unprecedentedly high efficiency for photocatalytic conversion of methane to methanol over Au–Pd/TiO2 – what is the role of each component in the system?

2021 ◽  
Author(s):  
Xiaojiao Cai ◽  
Siyuan Fang ◽  
Yun Hang Hu
Keyword(s):  
Methane Conversion ◽  
High Efficiency ◽  
Mild Conditions ◽  
Highly Efficient ◽  
System P ◽  
Conversion Of Methane

Direct and highly efficient methane conversion to methanol under mild conditions is achieved via photocatalysis over Au–Pd/TiO2.

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