Results 101 to 110 of about 9,914 (265)

C‐Terminal Functionalization Methods of Amino Acids, Peptides, and Proteins

Chemistry – A European Journal, EarlyView.
C‐terminal functionalization offers powerful routes to peptide and protein diversification, yet epimerization, hydrolysis, and selectivity remain key challenges. This Review surveys enzymatic, decarboxylative, and condensation strategies, highlighting advances toward chemo‐ and regioselective, protecting‐group‐free, atom‐efficient methods applicable to
Jay Hanssens, Mark Lambers, Romano V. A. Orru, Jordy M. Saya   +3 more
wiley   +1 more source

Synthesis and characterization of amphiphilic nitroxide 1,1,3,3–tetraethylisoindoline–2–oxyl–5–sodium sulfonate (TEIOSNa)

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract The synthesis and characterization of an amphiphilic nitroxide to be used as a controlling agent in a nitroxide‐mediated living radical polymerization in aqueous dispersion media is presented. In the first stage of nitroxide synthesis (phthalimide protection), two reaction methods were employed: traditional and microwave.
Enrique García‐Leal, Martha Eugenia Albores Velasco, René O. Vargas, Rubén Mil‐Martínez   +3 more
wiley   +1 more source

Iodophor-Catalyzed Disulfenylation of Amino Naphthalenes with Aryl Sulfonyl Hydrazines

Molecules
An iodophor-catalyzed direct disulfenylation of amino naphthalenes with aryl sulfonyl hydrazines in water was developed. A series of aryl sulfides were obtained in moderate to excellent yields.
Yutong Yuan, Jing He, Xiaowei Ma, Sheng Han, Yan Liu   +4 more
doaj   +1 more source

Copper-Catalysed Ring Opening of Polycyclic meso-Hydrazines with Trialkylaluminium Reagents and SimplePhos Ligands

, 2010
meso-Hydrazines could be desymmetrised by ring-opening reactions by using various metal catalysts to form substituted cyclopentenes, which have a high synthetic potential.
Palais, Laetitia, Alexakis, Alexandre, Bournaud, Chloée, Micouin, Laurent   +3 more
core   +1 more source

Nucleophilic Reactivities of Hydrazines and Amines: The Futile Search for the α‑Effect in Hydrazine Reactivities

, 2016
The kinetics of the reactions of amines, hydrazines, hydrazides, and hydroxylamines with benzhydrylium ions and quinone methides were studied in acetonitrile and water by UV–vis spectroscopy, using conventional spectrometers and stopped-flow and laser ...
Anna Antipova (2041855), Herbert Mayr (1353507), Tobias A. Nigst (2041858)   +2 more
core   +1 more source

Locking Fe Single Atoms Into the Lattices of Mesoporous TiO2 Promotes Nitrogen Reduction

EcoEnergy, EarlyView.
S‐coordinated Fe single‐atom catalysts on mesoporous TiO2 have been constructed by a universal lattice‐confined strategy. This catalyst shows a unique nanoconfinement effect for mass transfer and maximizes the active sites to mimic nitrogenase for ambient electrocatalytic N2 reduction reaction.
Danli Liang, Ruicong Wang, Yujuan Zhao, Zaiwang Zhao   +3 more
wiley   +1 more source

Direct catalytic photodecarboxylative amination of carboxylic acids with diazirines: Divergent access to amines, hydrazines, and nitrogen-containing heterocycles [PDF]

Amines, hydrazines, and nitrogen-containing heterocycles are pivotal species in medicine, agriculture, fine chemicals, and materials. Diazirines have been recently reported to serve as versatile electrophilic amination reagents for the synthesis of ...
Justin, Lopchuk, Paresh, Athawale, Preeti, Chandrachud, Vishala, Maharaj   +3 more
core   +2 more sources

A Mixed‐Ligand Metal–Organic Framework Strategy to Construct High‐Density O/S‐Shelled Ag Nanoparticle Electrocatalysts for Syngas Modulation

EcoEnergy, EarlyView.
Mixed‐ligand Ag–triazole MOF precursors reconstruct into ligand‐shelled Ag nanoparticle electrocatalysts that retain detectable O/S‐derived interfacial species. By combining ligand‐ratio and potential control, the CO2‐to‐syngas output can be tuned across H2‐rich, near‐equimolar, and CO‐rich regimes.
Ren‐Feng Yang, Xu‐Dong Wu, Yu‐Die Zhang, Wei‐Peng Chen, Xiao‐Hui Li, Qi Zhou, Kai‐Zhong Zhang, Xian‐Yue Song, Hao‐Ran Chu, Hai‐Feng Zhang, Xiao‐Hong Xiong, Mian Li, Xiao‐Chun Huang   +12 more
wiley   +1 more source

One‐Step Synthesis of Si–Graphene Heterostructures via in‐Flight Gas‐Phase Mixing for High‐Capacity Silicon‐Rich Anodes

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A one‐step gas‐phase synthesis directly assembles amorphous Si nanoparticles with few‐layer graphene heterostructures via in‐flight mixing. Compositions with only 15 wt.% FLG deliver ~2800 mAh g−1 (Si + FLG) at 0.05 C and retain ~1400 mAh g−1 after 100 cycles at a high cycling rate of 1 C, enabled by a percolated, strain‐buffering graphene network that
Muhammad Ali, Mukarram Ali, Yasaman Jarrahizadeh, Axel Lorke, Michael A. Pope, Hartmut Wiggers   +5 more
wiley   +1 more source

Occupational exposure to hydrazines [PDF]

"NIOSH recommends that employee exposure in the workplace to hydrazine, methylhydrazine, 1,1-dimethylhydrazine, 1,2-dimethylhydrazine, and phenylhydrazine, and their salts formed by addition with acids, such as sulfates, hydrochlorides, or hydrobromides,

core   +1 more source