Results 61 to 70 of about 39,482 (297)
MetalCenter‐Dependent Selectivity Divergence in MN4 Single‐Atom Catalysts for Aerobic HMF Oxidation
Advanced Science, EarlyView.Two single‐atom catalysts with M‐N4 configurations (FeN4 and CoN4) were developed for selective HMF oxidation. FeN4 achieves 93.9% selectivity toward FFCA via superoxide anions (O2•−), while CoN4 preferentially produces FDCA through hydroxyl radicals (•OH). DFT calculations reveal that distinct adsorption energies and charge redistribution at the metal
Haoyu Wang +6 more
wiley +1 more source
Angewandte Chemie, EarlyView.Cyclic diaryliodonium salts engage aryl Grignard reagents to trigger a self‐propagating aryne–arylation cycle. Transient cyclic triaryliodanes serve as aryne precursors and dynamic aryl reservoirs, delivering iodine‐capped teraryls with predominant meta‐selectivity. The preserved C─I bond enables outward π‐extension or inward recyclization.
Daichi Ikeshita +2 more
wiley +2 more sources
Dichloromethylation of enones by carbon nitride photocatalysis
, 2020 Small organic radicals are ubiquitous intermediates in photocatalysis and are used in organic synthesis to install functional groups and to tune electronic properties and pharmacokinetic parameters of the final molecule.
Antonietti, M. +4 more
core +1 more source
Photooxygenation of furans in water and ionic liquid solutions [PDF]
, 2009 Photooxygenation of differently functionalized furans is investigated in aqueous solutions and in ionic liquids [emim]Br and [bmim]BF4. The reaction is generally selective and the final products derive from rearrangement of the intermediate ...
A. Astarita +5 more
core +1 more source
High‐Performance Recycling Biobased Photopolymers for 3D Printing
Advanced Science, EarlyView.By using biobased phenols like eugenol, novel biobased photopolymers containing dissociative phenol‐carbamate bonds are designed for 3D printing. Meanwhile, a “mixed‐monomer assisted recycling” strategy is proposed to recycle the materials. The resulting materials not only achieve high‐performance and excellent chemical recyclability simultaneously ...
Hang Zhou +12 more
wiley +1 more source
High chemoselectivity in the phenol synthesis
Beilstein Journal of Organic Chemistry, 2011 Efforts to trap early intermediates of the gold-catalyzed phenol synthesis failed. Neither inter- nor intramolecularly offered vinyl groups, ketones or alcohols were able to intercept the gold carbenoid species. This indicates that the competing steps of
Matthias Rudolph +3 more
doaj +1 more source
Acta Crystallographica Section E: Crystallographic Communications, 2017 The title molecular salts, C15H20NO+·C4H3O4−, (I), and C9H15INO+·C4H3O4−, (II), have very similar molecular geometries for both cation and anion. The anions of both (I) and (II) are practically planar (r.m.s. deviations = 0.062 and 0.072 Å, respectively)
Elisaveta A. Kvyatkovskaya +5 more
doaj +1 more source
The odour of white bread [PDF]
, 1973 Volatile constituents of white bread were investigated. Different methods were used for isolating and concentrating components to avoid artefacts as far as possible. Especially good was enlarged vapour analysis.
Mulders, E.J.
core +1 more source
Advanced Science, EarlyView.A Cu‐mediated Ni(OH)2 catalyst with orthogonal activity by precise valence engineering simultaneously accelerates rate‐determining aldehyde C─H activation in HMF oxidation and impedes O─H deprotonation in competing OER. This multi‐functional synergistic catalysis enables FDCA production at industrial‐level current densities without sacrificing FEFDCA ...
Junge Yang +7 more
wiley +1 more source
Recent Updates on Anti-Inflammatory and Antimicrobial Effects of Furan Natural Derivatives
Journal of Inflammation Research, 2020 Mohammad Alizadeh,1,* Moludi Jalal,2 Khodaei Hamed,3 Amir Saber,2,* Sorayya Kheirouri,1 Fatemeh Pourteymour Fard Tabrizi,3 Negin Kamari2 1Nutrition Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; 2Department of Nutritional Sciences,
Alizadeh M +6 more
doaj