A5014655126- Acoustic Wave Phenomena Research
- Metamaterials and Metasurfaces Applications
- Asymmetric Synthesis and Catalysis
- Synthetic Organic Chemistry Methods
- Adsorption and biosorption for pollutant removal
- X-ray Diffraction in Crystallography
- Cyclopropane Reaction Mechanisms
- Underwater Acoustics Research
- Crystallization and Solubility Studies
- Hearing Loss and Rehabilitation
- Topological Materials and Phenomena
- Environmental Quality and Pollution
- Plasmonic and Surface Plasmon Research
- Catalytic C–H Functionalization Methods
- Synthesis of β-Lactam Compounds
- Organic Chemistry Cycloaddition Reactions
- Photonic and Optical Devices
- Hepatitis C virus research
- Chemical Synthesis and Reactions
- Synthesis and Catalytic Reactions
- Polyoxometalates: Synthesis and Applications
- Membrane Separation Technologies
- Chemical Synthesis and Analysis
- Noise Effects and Management
- Nanomaterials for catalytic reactions
Zhengzhou University of Light Industry
2022-2024
Nanjing Agricultural University
2023
Beijing Urban Construction Design & Development Group (China)
2019-2022
Peking University
2019-2022
Linyi University
2022
Shaanxi University of Science and Technology
2020-2021
Xi'an Jiaotong University
2005-2020
China XD Group (China)
2020
State Key Laboratory of Pollution Control and Resource Reuse
2018
Sichuan University
2010-2014
The first catalytic enantioselective Roskamp reaction of alpha-alkyl-alpha-diazoesters with aromatic aldehydes was realized using a simple chiral N,N'-dioxide-scandium(III) complex. Remarkably, 0.05 mol % catalyst, the performed well over series substrates, giving desired products chemoselectively in excellent yields (up to 99%) and enantioselectivities 98% ee) under mild conditions. This protocol provides promising method for synthesis alpha-alkyl-beta-keto esters 1,3-diols.
α-Diazoesters were discovered to be good electrophiles in a catalytic asymmetric α-functionalization of ketones for the first time. This reaction also provided direct and efficient method C-N bond formation with excellent yields (up 98%) enantioselectivities 99% ee) under mild conditions. The application electrophilicity α-diazoesters opens up novel way access diversity diazo chemistry.
Gentamicin, a widely used antibiotic for the treatment of bacterial infection, can cause nephrotoxicity. Tetramethylpyrazine (TMP) is compound purified from rhizome Ligusticum wallichi (Chuanxiong) and has been found to protect against ischaemia-reperfusion injury, nephritis alcohol-induced toxicity in rat kidneys.We renal tubular cells (RTCs), NRK-52E, this study. The cytotoxicity gentamicin was checked with transferase-mediated deoxyuridine triphosphate nick end-labeling (TUNEL) staining,...
Asymmetric cyanation of a class easily available olefins with favorable cyanide source ethyl cyanoformate (CNCOOEt) was realized by an interesting modular catalyst. High yields and ee values were obtained for range substrates under solvent-free mild reaction conditions. The products could be transformed to the enantioenriched useful intermediates 5, 6, pharmaceutically important γ-aminobutyric acid 7.
Highly diastereo- and enantioselective [2 + 2]- [4 2]-cycloadditions of disubstituted ketenes were realized by chiral Lewis acid catalysis. A series arylalkylketenes underwent the reaction smoothly with isatins β,γ-unsaturated α-ketoesters, providing optically active β-lactones δ-lactones vicinal centers in excellent yields (up to 99%) enantioselectivities 99% ee), as well exclusively high diastereoselectivities under 0.2–2 mol % catalyst loading.
A simple and H2O2-efficient asymmetric epoxidation of α,β-unsaturated carbonyl compounds was accomplished using a chiral N,N′-dioxide–Sc(III) complex catalyst. number optically active epoxides were obtained from the corresponding ketones amides under additive-free conditions. The catalytic system is convenient with good water- air-tolerance, as well excellent yields enantioselectivities.
The present study was designed to examine whether rabbits fed a diet containing high fat and sucrose could develop obesity insulin resistance (IR), the major pathophysiological features of metabolic syndrome. Male Japanese white were either normal chow (control) or (HFSD) for 36 weeks. Plasma levels triglycerides (TG), total cholesterol (TC), glucose measured. To evaluate metabolism, we performed an intravenous tolerance test. In addition, compared adipose tissue accumulation in HFSD-fed...
An efficient and practical synthesis of optically pure β-pyrazole-substituted alcohols was achieved by an asymmetric ring-opening reaction meso-epoxides with pyrazole derivatives as the nucleophile. In presence 1 mol % N,N′-dioxide–Sc(OTf)3 complex, excellent enantioselectivity yields were obtained from meso-epoxides. The process could also be used for a mixture cis- trans-stilbene oxides. A proposed transition-state model is provided. Detailed facts importance to specialist readers are...
Locally resonant phononic crystals have excellent low-frequency characteristics and can result in a small size controlling long wavelength. Based on the locally crystal theory, pentamode metamaterials with composite materials are proposed studied. The acoustic band frequencies of were found to be two orders magnitude smaller than those conventional Bragg-Scattering same lattice constant. Therefore, single-mode frequency regions bandgaps which under 110 Hz obtained by centimeter-scale figure...
A spoof surface plasmon polaritons (SSPPs) waveguide structure with periodic T-grooves is proposed and investigated in this paper. Compared to the conventional plasmonic rectangular-grooves, support guided SSPPs wave enhanced propagation confinement. Moreover, can achieve 39.4% decrease length compared rectangular-grooves waveguide. The properties of confinement are able improve by adjusting shape dimensions T-grooves. effects bend radius 90° on performance analyzed, good transmission...
Bioretention systems for collecting, filtering, and treating pollutants (e.g., heavy metals) in stormwater runoff have recently attracted increased attention from the scientific community. However, excess metal accumulation after long-term operation may deteriorate effluent quality, affect plant growth landscape benefits, shorten service life of bioretention systems. It has been shown that most metals accumulated were distributed soil/media layer, their concentration decreased with...
Abstract The catalytic asymmetric epoxidation of 2‐arylidene‐1,3‐diketones using aqueous 30% H 2 O as oxidant has been successfully realized by a N , N′ ‐dioxide–scandium(III) triflate [Sc(OTf) 3 ] complex, giving the corresponding products in moderate to good yields (up 85%) with excellent enantioselectivities 99% ee ) under mild reaction conditions without extra additives. magnified image
A compact flexible multifrequency splitter based on an arc waveguide constructed of plasmonic metallic grating structures with graded-height T-grooves is proposed and studied. The dispersion curves cutoff frequencies the waveguides different T-groove heights are different. guided spoof surface polariton waves at can be localized dissimilar angles along graded waveguide. output flexibility arbitrary groove for realized by introducing additional symmetrical structure as output. four-, seven-,...