Results 101 to 110 of about 13,631,199 (274)

Aza‐Büchner–Curtius–Schlotterbeck Reaction Enables Selective Construction of Quaternary Carbon Centers

Angewandte Chemie International Edition, EarlyView.
We introduce the Aza‐Büchner–Curtius–Schlotterbeck (ABCS) reaction: A mild, catalyst‐free method for homologating aryl imines. Diverging from the traditional BCS mechanism, the diazo intermediate undergoes selective C─C insertion to form an all‐carbon quaternary center.
Simon O. Angerer, Vincent George, Aryaman Pattanik, Gaia Carpentiero, Tereza Morcinková, Julia Rehbein, Burkhard König   +6 more
wiley   +1 more source

From betaines to anionic N-heterocyclic carbenes. Borane, gold, rhodium, and nickel complexes starting from an imidazoliumphenolate and its carbene tautomer

Beilstein Journal of Organic Chemistry, 2016
The mesomeric betaine imidazolium-1-ylphenolate forms a borane adduct with tris(pentafluorophenyl)borane by coordination with the phenolate oxygen, whereas its NHC tautomer 1-(2-phenol)imidazol-2-ylidene reacts with (triphenylphosphine)gold(I) chloride ...
Ming Liu, Jan C. Namyslo, Martin Nieger, Mika Polamo, Andreas Schmidt   +4 more
doaj   +1 more source

Nanofiber composites containing N-heterocyclic carbene complexes with antimicrobial activity

, 2012
Ahmed A Elzatahry1,4, Abdullah M Al-Enizi1, Elsayed Ahmed Elsayed2,5, Rachel R Butorac3, Salem S Al-Deyab1, Mohammad AM Wadaan2, Alan H Cowley31Petrochemical Research Chair, Department of Chemistry, 2Chair of Advanced Proteomics & Cytomics ...
Al-Deyab SS, Cowley AH, Butorac RR, Wadaan MAM, Al-Enizi AM, Elzatahry AA, Elsayed EA   +6 more
core  

Activation of Metal Complexes With Ultrasound Waves for Targeted Anticancer Therapy

Angewandte Chemie International Edition, EarlyView.
Ultrasound enables non‐invasive activation of metal‐based therapeutics deep within tumors. Acoustic cavitation can drive sonodynamic reactive oxygen species generation or mechanochemical metal–ligand bond dissociation, enabling controlled release of bioactive payloads.
Félix Grosjean, Nicolás Montesdeoca, Gilles Berger, Johannes Karges   +3 more
wiley   +1 more source

Bent metal carbene geometries in amido N-heterocyclic carbene complexes

, 2004
Lithium(I) and uranium(VI) amido-tethered Bu(t)-substituted N-heterocyclic carbene (NHC) complexes exhibit very distorted metal-carbene bonds; the corresponding magnesium(II) and mesityl-substituted NHC uranium(VI) complexes are undistorted; the ...
Mungur, S.A., Liddle, S T, Arnold, P.L., Liddle, S.T., Wilson, C., Mungur, S A, Sarsfield, M J, Wilson, C, Arnold, P L, Sarsfield, M.J.   +9 more
core   +1 more source

A Ruthenium(CAAC‐5) Olefin Metathesis Catalyst for Bioconjugation

Angewandte Chemie International Edition, EarlyView.
The aqueous instability of ruthenium catalysts restricts olefin metathesis in biological media. A Ru(CAAC‐5) complex bearing an aniline handle is reported that remains active under biologically relevant conditions and enables bioconjugation to proteins, peptides, and an artificial metalloenzyme, providing a robust platform for olefin metathesis in ...
Damian Alexander Graf, Mikhail Boym, María Álvarez, Tsvetan Kardashliev, Thomas R. Ward   +4 more
wiley   +1 more source

A Stable Four-Membered N-Heterocyclic Carbene [PDF]

, 2004
The synthesis of the first four-membered N-heterocyclic carbene is described. Depending on the substituents on the nitrogen atoms, it is possible to characterize at room temperature the carbene dimer or the free carbene.
Despagnet-Ayoub, Emmanuelle, Grubbs, Robert H.   +1 more
core  

Molecular docking analysis of N-heterocyclic carbene and silver N-heterocyclic carbene complexes with thioredoxin reductas

, 2020
Department of Chemistry, Faculty of Art and Science, Ordu University, 52200 Ordu, Turkey Department of Basic Education, Faculty of Education, Cumhuriyet University, 58140 Sivas, Turkey E-mail: elvanustun@odu.edu.tr Manuscript received online 20 October 2020, revised and accepted 31 October 2020 Molecular docking is a frequently used method in computer ...
Üstün, Elvan, Şahin, Neslihan
openaire   +2 more sources

An overview on the N-heterocyclic carbene-catalyzed Aza-Benzoin condensation reaction [PDF]

, 2018
The N-heterocyclic carbene(NHCs)-catalyzed aza-benzoin condensation reaction is an efficient, single step strategy which employs easily available substrates, such as aldehydes and imines, to provide α-amino ketones.
D. C. Albanese, N. Gaggero, Nicoletta Gaggero, Domenico Albanese   +3 more
core   +1 more source

Synthesis of C2-Symmetric Benzimidazolium Salts and Their Application in Palladium-Catalyzed Enantioselective Intramolecular α-Arylation of Amides

Molecules, 2016
A series of C2-symmetric chiral benzimidazolium salts, the precursor of N-heterocyclic carbene ligands, were designed and synthesized from 1,2-dibromobenzene.
Weiping He, Wei Zhao, Bihui Zhou, Haifeng Liu, Xiangrong Li, Linlin Li, Jie Li, Jianyou Shi   +7 more
doaj   +1 more source