A5077722126- Chemical Synthesis and Analysis
- Chemical synthesis and alkaloids
- Supramolecular Self-Assembly in Materials
- X-ray Diffraction in Crystallography
- Robotic Mechanisms and Dynamics
- Asymmetric Synthesis and Catalysis
- Crystallization and Solubility Studies
- Polydiacetylene-based materials and applications
- Synthetic Organic Chemistry Methods
- Hydraulic and Pneumatic Systems
- Robot Manipulation and Learning
- Minerals Flotation and Separation Techniques
- Fluorine in Organic Chemistry
- Teleoperation and Haptic Systems
- Fault Detection and Control Systems
- Advanced Synthetic Organic Chemistry
- Marine Sponges and Natural Products
- Cyclopropane Reaction Mechanisms
- Metal Extraction and Bioleaching
- Iterative Learning Control Systems
- Click Chemistry and Applications
- Dendrimers and Hyperbranched Polymers
- Cholinesterase and Neurodegenerative Diseases
- Microbial Natural Products and Biosynthesis
- Fungal Biology and Applications
Wenzhou Medical University
2021-2025
Shaanxi Normal University
2020-2024
Wuhan Institute of Technology
2023-2024
Beijing University of Chemical Technology
2024
Huaqiao University
2012-2023
Fujian Electric Power Survey & Design Institute
2017-2022
Zhejiang Taizhou Hospital
2021
Zhejiang University
2021
Shanghai Jiao Tong University
1995-2020
Wuhan University of Science and Technology
2018-2019
Abstract The evolution of lignin biosynthesis was critical in the transition plants from an aquatic to upright terrestrial lifestyle. Lignin is assembled by oxidative polymerization two major monomers, coniferyl alcohol and sinapyl alcohol. Although recently discovered laccases, LAC4 LAC17, have been shown play a role Arabidopsis thaliana, disruption both genes only leads relatively small change content under continuous illumination. Simultaneous LAC11 along with LAC17 causes severe plant...
Glycosylation is a ubiquitous reaction controlling the bioactivity and storage of plant natural products. small molecules catalyzed by superfamily glycosyltransferases (GTs) in most species studied to date. We present crystal structures UDP flavonoid/triterpene GT UGT71G1 from Medicago truncatula bound or UDP-glucose. The reveal key residues involved recognition donor substrate and, comparison with other structures, suggest His-22 as catalytic base Asp-121 residue that may assist...
n-Type 1D nanostructures are formed from the β-sheet assembly of dipeptides bearing a 1,4,5,8-naphthalenetetracarboxylic acid diimide (NDI) side chain into either helical nanofibers or twisted nanoribbons. Amyloid-like 1-D and nanoribbons assemble in an aqueous solution depending on placement NDI group. β-Sheet-type hydrogen bonding π−π association play important roles directing process. A delicate balance between electrostatic repulsion hydrophobic interactions is critical for...
Mmm—stacks of donuts! A one-dimensional n-type nanotube was formed by stacking rings from the bolaamphiphilic self-assembly 1,4,5,8-naphthalenetetracarboxylic acid diimide (NDI) with L-lysine headgroups (see picture). Solid-state NMR studies demonstrate exceptional conformational homogeneity constituent molecules that make up nanotubes. Detailed facts importance to specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They...
The beta-sheet self-assembly of an n-type NDI-dipeptide into a transparent, self-supporting hydrogel at low concentrations is described. nanostructure the gel stabilized by intermolecular pi-pi association NDI units and interdigitation fluorene groups.
A typical recurrent neural network called zeroing (ZNN) was developed for time-varying problem-solving in a previous study. Many applications result linear equation and inequality systems that should be solved real time. This paper provides ZNN model determining the solution of systems. By introducing nonnegative slack variable, are transformed into mixed nonlinear system. The is established via definition an indefinite error function usage exponential decay formula. Theoretical results...
Abstract Roll up : A peptide–dendron hybrid (PDH) is capable of self‐assembling into either a soluble nanotube or an amyloid‐like fibrillar network. The structures interconvert on adjusting the salt concentration pH value. Their hydrophobic interfaces efficiently encapsulate molecules in water which can then be released by lowering magnified image
The features you need: first total synthesis of lycopodium alkaloid alopecuridine has been achieved in 13 steps the longest linear sequence, and its biomimetic conversion into sieboldine A validated through a two-step oxidation. semipinacol rearrangement functionalized medium-sized ring an intramolecular pinacol coupling mediated by SmI2 (see scheme; Boc=tert-butoxycarbonyl).
Assembly call: The 1D self-assembly of tube-forming NDI–lysine amphiphiles in water is described. Nanotubes formed from an acid or ester give nanotubes with small inner diameters 4–5 nm, whereas the corresponding amide coils into ranging 100–200 nm (see TEM images). Spectroscopic measurements indicate presence highly ordered, homogeneous structures significant π–π interactions. Detailed facts importance to specialist readers are published as ”Supporting Information”. Such documents...
An enantioselective sulfenylation/semipinacol rearrangement of 1,1-disubstituted and trisubstituted allylic alcohols was accomplished with a chiral Lewis base Brønsted acid as cocatalysts, generating various β-arylthio ketones bearing an all-carbon quaternary center in moderate to excellent yields enantioselectivities. These arylthio ketone products are common intermediates many applications, for example, the design new catalysts/ligands total synthesis natural products. Computational...
A novel and efficient approach toward the assembly of synthetically challenging tetracyclic [6,5,7,5] core structure calyciphylline A-type alkaloids is developed. The synthetic route features a tandem semipinacol rearrangement/Nicholas reaction that has been devised strategically to construct spirocyclic A/B ring sterically congested vicinal all-carbon quaternary carbon centers in high diastereoselectivity. Late-stage installation hydropyrrole strained 7-membered via double-reductive...
Abstract
Vom Ring zum Rohr: Eine eindimensionale, n-halbleitende Nanoröhre entsteht durch Stapelung von Ringen, die bolaamphiphile Selbstorganisation 1,4,5,8-Naphthalintetracarbonsäurediimid (NDI) mit L-Lysin-Kopfgruppen gebildet wurden (siehe Bild). Festkörper-NMR-Spektroskopie belegt außergewöhnliche konformative Homogenität der Moleküle, aus denen Nanoröhren aufgebaut sind. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents peer-reviewed,...
Recently, the approach based on recurrent neural network (RNN) has been considered a powerful alternative to mathematical problem solving. In this study, new discrete-time RNN (DTRNN) is proposed and investigated determine an exact solution of dynamic nonlinear equations. Specifically, resultant DTRNN model established for solving equations by utilizing Taylor-type difference rule. This then theoretically proven have O(τ <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Abstract A divergent synthetic approach to six Ganoderma meroterpenoids, namely ganocins A–C, ganocochlearins C and D, cochlearol T, has been developed for the first time. This route features a two‐phase strategy which includes early‐stage rapid construction of common planar tricyclic intermediate followed by highly selective late‐stage transformations into various meroterpenoids. Key are bioinspired intramolecular hetero‐Diels–Alder reaction Stahl‐type oxidative aromatization, allowing...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA New Asymmetric Synthesis of .alpha.-Methylcysteines via Chiral AziridinesHui Shao, Qin Zhu, and Murray GoodmanCite this: J. Org. Chem. 1995, 60, 4, 790–791Publication Date (Print):February 1, 1995Publication History Published online1 May 2002Published inissue 1 February 1995https://pubs.acs.org/doi/10.1021/jo00109a004https://doi.org/10.1021/jo00109a004research-articleACS PublicationsRequest reuse permissionsArticle...
(+)-Alopecuridine, (+)-sieboldine A, and (−)-lycojapodine three structurally unique related lycopodium alkaloids, have been synthesized in enantiomeric forms through an efficient strategy. The main synthetic approach for (+)-alopecuridine features a semipinacol rearrangement of hydroxyl epoxide to construct the spiro 6,9-azacarbocycles with all-carbon quaternary center late-stage SmI2-mediated intramolecular coupling form 5-membered ring. Subsequently, biomimetic synthesis A was accomplished...
Recurrent neural network (RNN) has recently been viewed as a significant alternative to online mathematical problem solving. This paper offers important improvements by proposing the first RNN model solve time-dependent underdetermined linear system with bound constraint. In particular, introducing nonnegative vector, bound-constrained is initially transformed into that comprises and nonlinear equations. The newly constructed can thus zero in on Then, theoretically proven have convergence...