A5101431902- Hydrocarbon exploration and reservoir analysis
- Enhanced Oil Recovery Techniques
- Hydraulic Fracturing and Reservoir Analysis
- Catalytic C–H Functionalization Methods
- Natural product bioactivities and synthesis
- Plant biochemistry and biosynthesis
- Synthesis and Catalytic Reactions
- CO2 Sequestration and Geologic Interactions
- Petroleum Processing and Analysis
- Catalytic Cross-Coupling Reactions
- Sulfur-Based Synthesis Techniques
- Metal complexes synthesis and properties
- Synthetic Organic Chemistry Methods
- Pickering emulsions and particle stabilization
- Reservoir Engineering and Simulation Methods
- Magnetism in coordination complexes
- Drilling and Well Engineering
- Marine Sponges and Natural Products
- Asymmetric Hydrogenation and Catalysis
- Cyclopropane Reaction Mechanisms
- Phytochemical compounds biological activities
- Phytochemicals and Medicinal Plants
- Phytochemistry and Bioactive Compounds
- Polymer Nanocomposites and Properties
- Medicinal Plants and Neuroprotection
Changzhou University
2016-2025
University of Macau
2017-2024
University of Regina
2019-2024
Taiyuan University of Technology
2024
Northeast Forestry University
2023
State Forestry and Grassland Administration
2022
Wenzhou University
2019-2021
Nanjing University
1999-2018
Heilongjiang University
2013-2018
China Academy of Chinese Medical Sciences
2018
The insertion of an iridium complex into N-H bond in ammonia leads to a stable monomeric amido hydride solution at room temperature. This reaction advances the transition-metal coordination chemistry beyond its role for more than century as ancillary ligand. precursor this is iridium(I) olefin with aliphatic ligand containing one carbon and two phosphorus donor atoms. Kinetic isotopic labeling studies indicate that dissociates give 14-electron fragment, which then reacts ammonia. cleavage...
Five new withanolide derivatives (1, 9—12) were isolated from the roots of Withania somnifera together with fourteen known compounds (2—8, 13—19). On basis spectroscopic and physiochemical evidence, 1 9—12 determined to be (20S,22R)-3α,6α-epoxy-4β,5β,27-trihydroxy-1-oxowitha-24-enolide (1), 27-O-β-D-glucopyranosylpubesenolide 3-O-β-D-glucopyranosyl (1→6)-β-D-glucopyranoside (withanoside VIII, 9), 27-O-β-D-glucopyranosyl (1→6)-β-D-glucopyranosylpubesenolide IX, 10), 3-O-β-D-glucopyranoside X,...
We report the dehydrogenation of 1,4-butanediol to γ-butyrolactone catalyzed by soluble ruthenium complexes without solvent or a hydrogen acceptor. An alkylphosphine version bis-phosphine diamine catalysts has been prepared and was found be longest-lived catalyst for conversion γ-butyrolactone. The catalytic production from 1,4-butandiol with this is simple conduct, environmentally friendly, highly efficient.
We previously reported that the methanol extract of Ashwagandha (roots Withania somnifera Dunal) induced dendrite extension in a human neuroblastoma cell line. In this study, we found six 18 compounds isolated from enhanced neurite outgrowth SH-SY5Y cells. Double immunostaining was performed rat cortical neurons using antibodies to phosphorylated NF-H as an axonal marker, and MAP2 dendritic marker. withanolide A-treated cells, length NF-H-positive processes significantly increased compared...
The reactions of aryl and alkylamines with the (PCP)Ir fragment (PCP = 1,3-di-tert-butylphosphinobenzene) were studied to determine reactivities stabilities amine amido hydride complexes relative C-H activation products. Reaction aniline unit generated from (PCP)IrH2 norbornene resulted in N-H oxidative addition product (PhNH)(H)Ir(PCP) (1a). In contrast, reaction this ammonia gave complex (NH3)Ir(PCP) (2). that would be formed by ammonia, (PCP)Ir(NH2)(H) (1b), was independently...
In this review, we provide a summary of recent progress regarding synthetic studies towards natural products <italic>via</italic> [5 + 2] cycloaddition reactions.
Amino acids, self-assembled<italic>in situ via</italic>hydrogen bonding, have been used to synthesize mesoporous zeolites without a calcination step.
Construction of the [5–7–7] tricyclic core eurifoloid A, which contains an unusual and highly strained bicyclo[4.4.1]undecane ring system with trans-bridgehead, was attempted using a type II intramolecular [5 + 2] cycloaddition reaction Meinwald rearrangement epoxide as key synthetic steps. The reported chemistry illustrates feasibility constructing 8-epi-eurifoloid A framework by cycloaddition.
Eight bioactive triterpenoid saponins (1-8) were isolated from the seeds of Aesculus chinensis, four which are novel compounds. The major identified as escin Ia (1), Ib (2), isoescin (3) and (4), while new compounds 22alpha-tigloyl-28-acetylprotoaescigenin-3beta-O-¿beta -D-glucopyranos yl (1-2) ¿beta-D-glucopyranosyl (1-4)-beta-D-glucopyranosiduronic acid (escin IVc, 5), 22alpha-angeloyl-28-acetylprotoaescigenin-3beta-O-¿bet a-D-glucopyrano syl IVd, 6),...
Mechanistic studies were conducted on beta-hydrogen elimination from complexes of the general formula [Ir(CO)(PPh(3))(2)(OR)], which are square planar alkoxo with labile ligands. The dependence rate, isotope effect, and alkoxide racemization phosphine concentration revealed unusually detailed information reaction pathway. remarkably stable, including those a variety electronically sterically distinct groups at beta-carbon. These much more stable than corresponding alkyl complexes....
Diaryl thioethers can be prepared via a copper-catalyzed cross-coupling between aryl halides and thioacetamide using Cs2CO3 as base DMSO-H2O solvent at 120 ˚C.
Skull defect repair is a complex and critical medical challenge, there an urgent need to develop multifunctional tissue engineering scaffolds for skull regeneration. The success of bone depends on the construction that can regulate immune microenvironment regeneration mimic liquid crystal viscoelastic properties natural extracellular matrix. Hence, smart hydrogel (PEGDA5/AM15/CLC-BMP-4@MBG) with good biocompatibility ability modulate wound has been developed defects. consists chitin...
In this work, the C 14‐16 alpha olefin sulphonate (AOS) surfactant, octylphenol ethoxylate (TX‐100), and methyl bis[Ethyl(Tallowate)]‐2‐hydroxyethyl ammonium sulphate (VT‐90) surfactant were selected as representatives of anionic, nonionic, cationic to stabilize foam. The effects concentration gas/liquid injection rates on foam performance examined by performing a series oil‐free flow tests injecting CO 2 foaming simultaneously into sandpacks. Foam flooding was conducted tertiary enhanced...
A new cycloartane-type triterpenoid saponin named riparsaponin (1) was isolated from the stem of Homonoia riparia Lour together with six known compounds. The structure determined by using NMR and mass spectroscopy X-ray crystallography techniques. Additionally, has a significant inhibitory effect on xanthine oxidase in vitro, IC50 11.16 nmol/mL.