A5042412154- Catalytic C–H Functionalization Methods
- Radical Photochemical Reactions
- Oxidative Organic Chemistry Reactions
- Asymmetric Synthesis and Catalysis
- Sulfur-Based Synthesis Techniques
- Optical measurement and interference techniques
- Advanced Fiber Laser Technologies
- Cyclopropane Reaction Mechanisms
- Synthesis and Catalytic Reactions
- Photonic Crystal and Fiber Optics
- Chemical Synthesis and Analysis
- Gas Sensing Nanomaterials and Sensors
- Transition Metal Oxide Nanomaterials
- Laser-Matter Interactions and Applications
- Synthesis of heterocyclic compounds
- Advanced Chemical Sensor Technologies
- Structural Health Monitoring Techniques
- Catalytic Alkyne Reactions
- Image Processing Techniques and Applications
- Natural product bioactivities and synthesis
- Fluorine in Organic Chemistry
- Chemical Synthesis and Reactions
- Synthesis and Reactivity of Heterocycles
- Metalloenzymes and iron-sulfur proteins
- Bioactive Compounds and Antitumor Agents
Linyi University
2019-2025
Sichuan University
2017-2025
Shandong University of Technology
2024-2025
Jiangxi Normal University
2023-2025
Anyang Normal University
2025
Chinese Academy of Medical Sciences & Peking Union Medical College
2024
Tianjin University
2023
Chengdu University
2017-2021
Hefei National Center for Physical Sciences at Nanoscale
2018
University of Science and Technology of China
2018
Photocatalysis opens up a new window for carbonyl chemistry. Despite multitude of photochemical reactions compounds, visible light-induced catalytic asymmetric transformations remain elusive and pose formidable challenge. Accordingly, the development simple, efficient, economic systems is ideal pursuit chemists. Herein, we report an enantioselective radical photoaddition to ketones through Lewis acid-enabled photoredox catalysis wherein in situ formed chiral N,N'-dioxide/Sc(III)-ketone...
Enantioselective photoreduction of ketones with hydrocarbons is promising for the straightforward construction chiral tertiary alcohols. But it generally promoted by ultraviolet light via ketyl radical–alkyl radical coupling, which suffers from a competitive charge-transfer process and self/cross coupling reactions. An appropriate selection catalyst that can alter reaction pathway deliver spatial required. Accordingly, we disclosed combined system involving Er(III)-based Lewis acid...
Visible light‐mediated enantioselective alkylation of carbonyls with hydrocarbons provides a beneficial access to the synthesis chiral alcohols in terms atom economy. Herein, we disclosed direct asymmetric a‐keto pyrazoleamides as C(sp3)–H donors for preparation tertiary a‐hydroxy amides. Our method operates by synergistic catalysis involving Ir‐based photoredox catalyst and N,N′‐dioxide‐NiBr2 complex enabled addition reaction good excellent yield enantioselectivity (up 87% 97% ee),...
A 2-alkenoylpyridine-bound N,N'-dioxide-TbIII complex has been found to absorb visible light reach the excited state, leading direct visible-light-excited catalytic enantioselective [2+2] cycloaddition of 2-alkenoylpyridines various alkenes in absence an additional photosensitizer. Diverse enantioenriched cyclobutanes were successfully obtained (yields up 70 %, >19:1 d.r., 92 % ee). The new chiral terbium(III) features a bathochromic shift, lower excitation energy, and facile intersystem...
The direct α-alkylation of acyclic carbonyls with nonactivated hydrocarbons through C(sp3 )-H functionalization is both extremely promising and notably challenging, especially when attempting to achieve enantioselectivity using iron-based catalysts. We have identified a robust chiral iron complex for the oxidative cross-coupling 2-acylimidazoles benzylic allylic hydrocarbons, as well alkanes. readily available tunable N,N'-dioxide catalysts in connection oxidants exhibit precise asymmetric...
A chiral <italic>N</italic>,<italic>N</italic>′-dioxide/Tb(OTf)<sub>3</sub> complex catalyzed diastereo- and enantioselective [4+3] cycloaddition of <italic>ortho</italic>-quinone methides with oxiranes has been described in this study.
In this paper, we report the use of CoTe2 nanosheet polyvinyl alcohol composites as saturable absorbers for pulse generation in erbium-doped fiber lasers. The absorption characteristics nanosheets have been investigated, and their modulation depth saturation intensity are 3.64% 1.25 MW/cm2, respectively. By controlling pump power polarization controller, conversion from dark–bright–dark pulses to h-shaped rains can be achieved laser. This mode-locked state transition occurs because nonlinear...
The complex alignment of 2-lane roads results in a higher risk traffic crashes. This study aims to identify key factors influencing vehicle driving states on curves. Five curve radii were selected create simulated scenarios. Vehicle operation data collected from 36 drivers using simulator. speed and lateral lane position chosen as indicators states. A 3-factor analysis variance (ANOVA) was conducted assess the effects radius, direction, position. Polynomial fitting models also developed...
A practical and effective copper-catalyzed dehydrogenative Diels–Alder reaction of gem-diesters ketone with dienes has been established. The active dienophiles were generated in situ via a radical-based dehydrogenation process, which reacted wide variety to afford various polysubstituted cyclohexene derivatives good excellent yields.
An unexpected homologation/dyotropic rearrangement/interconversion/[3+2] cycloaddition cascade reaction of α-diazoester-terminated N-propyl-substituted isatin derivatives was achieved in the presence a chiral N,N'-dioxide/ScIII catalyst. This catalytic manifold allows rapid construction several classes dimeric polycyclic compounds with good yields and high levels diastereo- enantioselectivity (up to 99 % ee). Furthermore, macrocyclic dimers can be obtained by an intermolecular homologation process.
Here we report an efficient asymmetric [4+2] cycloaddition of β,γ-unsaturated α-ketoesters with cyclobutenones. The corresponding products were obtained in good yields (up to 92%) excellent enantioselectivities 98% ee) and diastereoselectivities >19/1 dr). Moreover, based on the control experiments previous reports, a possible catalytic cycle was proposed.
Highly efficient asymmetric intermolecular radical-polar crossover reactions were realized by combining a chiral N,N'-dioxide/NiII complex catalyst with Ag2 O under mild reaction conditions. Various terminal alkenes and indanonecarboxamides/esters underwent radical addition/cyclization to afford spiro-iminolactones spirolactones good excellent yields (up 99 %) enantioselectivities 97 % ee). Furthermore, range of different radical-mediated oxidation/elimination or epoxide ring-opening...
The in-plane orientations of Si/SiC heterojunctions on 6H-SiC(0001) were investigated by high-resolution X-ray diffraction. An Si(111)/SiC(0001) heterostructure with an orientation Si[01−1]//SiC[110] is achieved at 900 °C, the Si/6H-SiC interface has a 4 : 5 Si-to-SiC matching mode residual lattice mismatch 0.26%, and edge dislocation density calculated to be 4.87 × 1013 cm−2. As growth temperature increased 1050 [110] preferential Si[−110]//SiC[0−10] observed, along Si[001]SiC[210]...