Results 71 to 80 of about 8,352 (265)
Advanced Science, EarlyView.A hierarchically porous AOPIM‐CNT electrode enables uranium harvesting from seawater via adsorption‐promoted electrodeposition. Rapid diffusion and selective adsorption are coupled with electrochemical crystallization and spontaneous detachment, creating a self‐refreshing process that sustains high‐capacity, continuous extraction from ultradilute ...
Zejun Song +7 more
wiley +1 more source
Highly Substituted 2,3-Dihydroisoxazoles by Et3N-Catalyzed Tandem Reaction of Electron-Deficient 1,3-Conjugated Enynes with Hydroxylamines [PDF]
, 2016 An Et3N-catalyzed tandem reaction of electron-deficient 1,3-conjugated enynes with hydroxylamines was developed which provided rapid, metal-free, and regioselective access to highly substituted multifunctionalized 2,3-dihydroisoxazoles under mild ...
Bo Du (219360) +3 more
core +5 more sources
Bromcyan und Hydroxylamine [PDF]
Berichte der deutschen chemischen Gesellschaft, 1904 n ...
openaire +3 more sources
Isovanillin derived N-(un)substituted hydroxylamines possessing an ortho-allylic group: valuable precursors to bioactive N-heterocycles [PDF]
, 2014 The intramolecutar 1,3-dipolar cycloaddition of isovanillin derived N-aryl hydroxylamines possessing ortho-allylic dipolarophites affords novel benzo analogues of tricyclic isoxazolidines that can be readily transformed into functionalized lactams, gamma-
Kumar Banote, Rakesh +10 more
core +1 more source
Atroposelective Construction of Axially Chiral Tetraarylethenes Via NHC‐Catalyzed Desymmetrization
Advanced Science, EarlyView.We report the first NHC‐catalyzed atroposelective synthesis of axially chiral TAEs via oxidative desymmetrization of prochiral TAE dialdehydes. This catalytic strategy operates under mild conditions and accommodates a broad range of phenolic and nitrogen nucleophiles, delivering diverse axially chiral TAEs in good yields and up to 99% ee.
Yang‐Ze Zheng +6 more
wiley +1 more source
Angewandte Chemie, EarlyView.This study employs a RuV═NH complex with hydrogen‐bonding (HB) sites in the SCS to afford non‐N‐substituted aziridines selectively. Nitrogen‐atom transfer occurs from the RuV═NH complex to alkenes in water to produce aziridine derivatives in high yields.
Tomoya Ishizuka +7 more
wiley +2 more sources
Dynamic Kinetic Asymmetric Allylation of Hydrazines and Hydroxylamines [PDF]
, 2016 Hydrazines and hydroxylamines have been found to be excellent nucleophiles for the palladium-catalyzed dynamic asymmetric allylic amination of vinyl epoxide, with good yields and enantioselectivities of up to 97% ee.
Erin Guidry (2358826) +4 more
core +1 more source
Advanced Science, EarlyView.A metal‐directed carbonization strategy transforms hierarchical organic microspheres into spiky carbon catalysts with Pd nanoparticles embedded at the tips. This approach resolves the activity‐stability trade‐off, achieving exceptional poison resistance in semi‐hydrogenations, offering a versatile, scalable platform for designing high‐performance ...
Yintao Li +9 more
wiley +1 more source
Molecules, 2018 Oxygen-insensitive NAD(P)H:nitroreductases (NR) reduce nitroaromatics (Ar-NO2) into hydroxylamines (Ar-NHOH) through nitroso (Ar-NO) intermediates. Ar-NO may be reduced both enzymatically and directly by reduced nicotinamide adenine dinucleotide or its ...
Benjaminas Valiauga +5 more
doaj +1 more source
Copper-Catalyzed Direct Amination of Electron-Deficient Arenes with Hydroxylamines [PDF]
, 2016 The C–H amination of electron-deficient arenes such as polyfluoroarenes and azole compounds with O-acylated hydroxylamines effectively proceeds in the presence of a copper catalyst even at room temperature to provide the corresponding anilines and ...
Naoki Matsuda (670386) +3 more
core +1 more source