A5082580932- Catalytic C–H Functionalization Methods
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Radical Photochemical Reactions
- Sulfur-Based Synthesis Techniques
- Advanced battery technologies research
- MXene and MAX Phase Materials
- Crystallography and molecular interactions
- Lignin and Wood Chemistry
- Advanced Cellulose Research Studies
- Oxidative Organic Chemistry Reactions
- Cyclopropane Reaction Mechanisms
- Coagulation and Flocculation Studies
- Supercapacitor Materials and Fabrication
- Arsenic contamination and mitigation
- Catalytic Alkyne Reactions
- Synthesis and Catalytic Reactions
- Mine drainage and remediation techniques
- Geochemistry and Elemental Analysis
- Catalytic Cross-Coupling Reactions
- Fluorine in Organic Chemistry
- Catalysis for Biomass Conversion
- Axial and Atropisomeric Chirality Synthesis
Iowa State University
2019-2024
Wuhan University
2021-2024
Nankai University
2024
East China Jiaotong University
2024
Henan Normal University
2024
Xiangtan University
2021-2024
Shanghai University of Electric Power
2024
Nanjing Agricultural University
2021-2023
Chongqing University
2017-2022
Ningbo University
2018
The practical progress of lithium–sulfur batteries is hindered by the serious shuttle effect and slow oxidation–reduction kinetics polysulfides. Herein, ZnFe2O4–Ni5P4 Mott–Schottky heterojunction material prepared to address these issues. Benefitting from a self-generated built-in electric field, as an efficient bidirectional catalysis regulates charge distribution at interface accelerates electron transfer. Meanwhile, synergy strong adsorption capacity derived metal oxides outstanding...
Abstract The serious shuttle effect and intrinsically sluggish oxidation–reduction reaction kinetics of polysulfides severely hinder the practical commercialization lithium–sulfur (Li–S) batteries. Herein, oxygen‐defect‐rich WO 3− x –W 3 N 4 Mott–Schottky heterojunctions are designed as efficient catalysts. Based on theoretical calculations comprehensive experimental characterization, exhibits a lower free energy change (1.03 eV) Li 2 S decomposition barrier (0.92 than W , which...
Abstract Cross-coupling reactions have developed into powerful approaches for carbon–carbon bond formation. In this work, a Ni-catalyzed migratory Suzuki–Miyaura cross-coupling featuring high benzylic or allylic selectivity has been developed. With method, unactivated alkyl electrophiles and aryl vinyl boronic acids can be efficiently transferred to diarylalkane allylbenzene derivatives under mild conditions. Importantly, chlorides also successfully used as the coupling partners. To...
Multicomponent catalytic processes that can generate multiple C(sp3)-C(sp3) bonds in a single step under mild conditions, particularly those employ inexpensive catalysts and substrates, are highly sought-after chemistry research for complex molecule synthesis. Here, we disclose an efficient Ni-catalyzed reductive protocol chemoselectively merges alkenyl amides with two different aliphatic electrophiles. Starting materials readily accessible from stable abundant feedstock, products furnished...
An efficient, atom-economical, and regioselective insertion of indoles into terminal alkynes has been realized via cobalt(III)-catalyzed C–H activation under mild conditions, leading to efficient synthesis α-gem-vinylindoles. The the follows a rare 1,2-selectivity, silyl alkynes, alkyl propargyl alcohols, protected amines are all applicable. mechanism this hydroarylation system studied in detail by combination experimental computational approaches. In reaction regioselectivity is dictated...
A novel palladium-catalyzed intermolecular ditrifluoromethoxylation of unactivated alkenes has been developed, using a new electrophilic reagent, SelectfluorCN, as strong oxidant, and AgOCF3 trifluoromethoxide source. Preliminary mechanistic studies revealed that the reaction was possibly initiated by Pd(IV) species, an unusual cis-addition CF3O-Pd(IV) into double bond leads to formation first C-OCF3 bond; in addition, second produced through reductive elimination at high-valent palladium center.
A selective palladium-catalyzed trifluoroethylation reaction of indoles has been developed. The C-H bond activation process, using CF3CH2I as the fluoroalkyl source, can be employed to prepare a variety 2-CF3CH2 substituted indoles. Moreover, because it displays wide functional group tolerance, process synthesize CF3CH2-containing bioactive through late-stage trifluoroethylation. results preliminary mechanistic study and DFT calculations show that β-diketone, acting an ionic palladium...
Abstract The development of a mild and general method for C(sp 3 )−H functionalization cyclic amines has been an ongoing challenge. In this work, we describe the copper‐catalyzed enantioselective alkynylation unactivated 2‐iodo‐benzamide under photo‐irradiation by intramolecular 1,5‐hydrogen atom transfer (HAT). employment new bisoxazoline diphenylamine ligand, in conjunction with 1,1′‐bi‐2‐naphthol, which significantly improved reduction potential copper complex, was key to success...
Transition-metal-catalyzed cross-coupling reactions are a powerful tool to construct carbon–carbon bonds in modern synthetic chemistry. Chromium catalysis is much less developed compared with the widely used palladium and nickel catalysis. Herein, we reported an efficient flexible chromium-catalyzed radical diacylation of alkenes help visible-light photoredox catalysis, giving access valuable 1,4-, 1,6-, 1,7-diones under mild conditions. The utility this methodology was proven by converting...
A surprisingly simple approach to increasing the mechanical properties of lignin-based carbon fiber by leveraging a newly discovered thermo-mechanochemistry lignin.
A ligand-controlled regioreversed 1,2-arylalkylation of alkenes via photoredox/nickel dual catalysis is reported. In contrast with previous reports on photoredox/nickel-catalyzed 1,2-alkylarylation reactions that initiate from the Giese addition an alkyl radical to alkene, this three-component conjugate coupling process occurs through nickel-catalyzed aryl thereby leading a complementary regioselectivity conventional 1,2-alkylarylation. An ortho-substituted bipyridyl ligand key tune...
Herein, we report an efficient and practical strategy for the synthesis of five types imidazo[2,1-<italic>a</italic>]isoquinolines <italic>via</italic> Cp*Rh<sup>III</sup>-catalyzed [4+2] annulation 2-arylimidazoles α-diazoketoesters, whose structural substituted diversity at 5- or 6-position can be precisely controlled by α-diazoketoester coupling partners.
We present herein an unprecedented desymmetrization of meso 1,3-diones by enantioselective intermolecular condensation. Under the catalysis a chiral phosphoric acid, range readily available undergo reaction with hydrazines to produce cyclic and acyclic keto-hydrazones bearing all-carbon quaternary center in high efficiency enantioselectivity. These compounds are also highly versatile for preparation multifunctional building blocks heterocycles excellent stereoselectivity.
A method was developed for ketone synthesis via a photoredox-assisted reductive acyl cross-coupling (PARAC) using nickel/photoredox dual-catalyzed cross-electrophile coupling of two different carboxylic acid esters. variety aryl, 1°, 2°, 3°-alkyl 2-pyridyl esters can act as electrophiles while N-(acyloxy)phthalimides (NHPI esters) 3°-radical precursors. Our PARAC strategy provides an alternative and reliable way to synthesize various sterically congested 3°-3°, 3°-2°, aryl-3° ketones under...
Lithium–sulfur batteries (LSBs) are regarded as one of the most promising future generation rechargeable battery energy storage devices due to their high theoretical specific capacity and density. However, development LSBs is largely influenced by shuttle effect slow kinetics lithium polysulfides, which seriously hinder commercial applications. Based on this, we propose a bimetallic modulating strategy synthesize carbon tube embedded with Co Mn bimetals anchored nitrogen-doped nanosheet...
Computational characterization of the oxidation addition promoted in rhodium-catalyzed cyclopropenone activation and conversion via quinolyl-, pyridyl-, nitrone-directed C–H is presented. Our theoretical studies found that a common catalytic cycle for these reactions starts with Rh(III)-mediated concerted metalation–deprotonation or electrophilic deprotonation to afford aryl-Rh(III) intermediate. Oxidative then gives cyclorhoda(V)butanone intermediate, leading cleavage cyclopropene moiety...