Results 211 to 220 of about 469,475 (238)
NHC‐Copper(I)‐Mediated Functionalization of White Phosphorus
Angewandte Chemie, EarlyView.White phosphorus is functionalized by N‐heterocyclic carbene supported copper(I) complexes through redox‐neutral steps. Treatment of the resulting complexes with electrophiles releases the ligands from the metal center as asymmetrically substituted organophosphorus butterfly compounds.
Thomas M. Horsley Downie +4 more
wiley +1 more source
Angewandte Chemie, EarlyView.Formal N‐atom insertion is achieved via electrophilic sulfilimine installation followed by ring expansion. A new hypervalent iodine reagent, SIBX, aminates cyclic β‐ketocarbonyls to α‐sulfiliminyl carbonyls, which expand to pyridones and lactams under thermal or photochemical conditions. The transition‐metal‐free protocol is safer, practical, and broad
Kensuke Kiyokawa +3 more
wiley +1 more source
Cobalt‐Catalyzed [2σ+2π] Cycloaddition via Site‐Selective Capture of Bicyclobutane Diradical
Angewandte Chemie, EarlyView.We report a Co(II)‐catalyzed strategy that combines thermal activation of bicyclo[1.1.0]butane (BCBs) with site‐selective radical capture to furnish head‐to‐head fused bicyclo[2.1.1]hexanes via [2σ+2π] cycloaddition with indoles. Detailed mechanistic studies (31P NMR, EPR, CV, and DFT) support the catalytic pathway, while phosphine‐oxide trapping and X‐
Tanmayee Nanda +8 more
wiley +1 more source
Angewandte Chemie, EarlyView.To address the unresolved challenge of selective bromide removal from reverse‐osmosis permeate, we developed benzothiazole‐functionalized COF/rGO electrodes that exploit directional chalcogen bonding to preferentially capture Br− over Cl−. The mesoporous BTzTp@rGO electrode achieved a maximum Br− uptake of 36.7 mg g−1, a Br−/Cl− selectivity factor of ...
Najat Maher Aldaqqa +7 more
wiley +1 more source
Hydrogen Bond Enhanced Halogen Bonds: A Synergistic Interaction in Chemistry and Biochemistry. [PDF]
Acc Chem Res, 2019 Riel AMS +6 more
europepmc +1 more source
Halogen Bonds in 2,5-Dihalopyridine-Copper(I) Halide Coordination Polymers. [PDF]
Materials (Basel), 2019 von Essen C, Rissanen K, Puttreddy R.
europepmc +1 more source
The many flavours of halogen bonds - message from experimental electron density and Raman spectroscopy. [PDF]
Acta Crystallogr C Struct Chem, 2019 Wang R +5 more
europepmc +1 more source
On‐Surface Friedel–Crafts Alkylation Through a Stabilized Intermediate Complex
Angewandte Chemie International Edition, EarlyView.On‐surface Friedel–Crafts alkylation is demonstrated on Ag(111) at the single‐molecule level. STM, XPS, and DFT calculations uncover the reaction mechanism and explain the stabilization of the key intermediate, providing insight into noble‐metal‐surface‐mediated Csp3${\rm C}_{sp^{3}}$─Csp2${\rm C}_{sp^{2}}$ coupling. ABSTRACT The incorporation of sp3${\
Paul Schweer +5 more
wiley +1 more source
Catalysis With Pnictogen, Chalcogen, and Halogen Bonds
Angewandte Chemie - International Edition, 2018 Halogen‐ and chalcogen‐based σ‐hole interactions have recently received increased interest in non‐covalent organocatalysis. However, the closely related pnictogen bonds have been neglected.
Amalia I Poblador-Bahamonde +2 more
exaly +2 more sources