Results 131 to 140 of about 5,308 (247)

Cobalt‐Catalyzed C─N Bond Formation via Metal‐Hydride Hydrogen Atom Transfer (MHAT)

Angewandte Chemie, EarlyView.
Cobalt‐catalyzed metal‐hydride hydrogen atom transfer (Co‐MHAT) converts simple alkenes into C─N bonds under mild, near‐neutral conditions. A shared Co─H‐initiated radical/organocobalt intermediate is channeled into radical trapping, radical‐polar crossover, or radical ligand transfer, unifying hydroamination, hydroazidation, hydroamidation, and remote
Arman Khosravi, Ming‐Yu Ngai
wiley   +2 more sources

A 3D Multitask Graph Neural Network Framework for Ames Mutagenicity Prediction

Advanced Intelligent Discovery, EarlyView.
Our proposed multitask graph neural network model has a high predictive accuracy for Ames mutagenicity. By operating directly on molecular graph representations instead of traditional molecular descriptors, and predicting strain‐specific results, the model outperforms most existing benchmarks.
Abigail E. Teitgen, Eugenia Ulzurrun, Nuria E. Campillo, Eduardo R. Hernández   +3 more
wiley   +1 more source

A Mild Disilane‐Enabled Halide‐to‐Deuterium Manifold With D2O for Aryl and Benzylic Halides

Angewandte Chemie, EarlyView.
A broadly applicable Pd‐catalyzed dehalogenative deuteration enables efficient conversion of aryl and benzylic halides with inexpensive deuterium oxide (D2O). The method proceeds under exceptionally mild conditions without strong bases, harsh reductants, or stoichiometric Lewis acid halide scavengers, and tolerates a wide range of functional groups ...
Wenliang Wang, Ryan Parlett, Liam Hornstein, Landon Conklin, Qi Tang, Xiaodong Shi   +5 more
wiley   +2 more sources

Lewis Acid Catalysis in the Oxidative Cycloaddition of Thiophenes¹

, 2016
Thiophenes 1 were treated with m-chloroperbenzoic acid (m-CPBA) under BF3·Et2O catalysis to afford thiophene S-monoxides. These could be reacted in situ as intermediary species with a number of dienophiles to provide arenes (with alkynes as dienophiles ...
Yuanqiang Li (690843), Thies Thiemann (2627839), Shuntaro Mataka (2259052), Tsuyoshi Sawada (2056981), Masashi Tashiro (2724964)   +4 more
core   +1 more source

Intramolecular (4+3) Cycloadditions of Thiophenes

, 2019
In contrast to the rich (4+3) cycloaddition chemistry of furans [1], only one instance of an intermolecular (4+3) cycloaddition of a thiophene has appeared with an unreported yield [2].
ZHENG, Y, Chiu, P
core  

Photoswitchable Ambiphilicity: Light‐Gated Frustrated Lewis Pair Reactivity and Z‐Type Interaction

Angewandte Chemie, EarlyView.
Light‐controlled ambiphilicity is realized in photoswitchable intramolecular phosphorus/boron Lewis pairs. Reversible switching modulates both the thermodynamics and kinetics of frustrated Lewis‐pair reactivity, enabling light‐gated CO2 binding and release.
Lennart Stoess, Emil L. M. Paulin, Fabian Michel, Lutz Greb   +3 more
wiley   +2 more sources

Sulphur speciation of PM10 samples by XANES spectroscopy

Open Chemistry, 2009
Cozzi Federico, Pellegrini Italo, Adami Gianpiero, Reisenhofer Edoardo, Bovenzi Massimo, Barbieri Pierluigi   +5 more
doaj   +1 more source

Regioselective C–H Activation of Substituted Thiophenes

, 2017
Die C–C-Bindungsknüpfung an Thiophenen wurde mittels Pd-katalysierter C–H-Aktivierung eingehend untersucht. Unter anderem gelang die direkte C4-selektive Arylierung mono- und disubstituierter Thiophene mit Organobor-Verbindungen in hohen Ausbeuten und ...
Schnapperelle, Ingo
core  

Novel C26 highly branched isoprenoid thiophenes and alkane from the Menilite Formation, Outer Carpathians, SE Poland

, 1997
A novel C26 HBI alkane [2,6,10,13,14-pentamethyl-7-(3 -methylpentyl)pentadecane] and C26 highly branched isoprenoid (HBI) thiophenes, possessing the same carbon skeleton, have been tentatively identified in sediments of the Oligocene Menilite Formation ...
Koster, J., J. Köster, J.S.Sinninghe Damsté, Sinninghe Damsté, J.S., Rospondek, M.J., M.J. Rospondek   +5 more
core   +1 more source

Gold‐Einzelatomkatalysatoren ermöglichen die selektive Shuttle‐Hydrochlorierung von Alkinen

Angewandte Chemie, EarlyView.
Gold‐Einzelatomkatalysatoren auf Aktivkohle ermöglichen dank des Zusammenwirkens zwischen Au(I)‐Zentren und dem Träger die heterogene Shuttle‐Hydrochlorierung von terminalen Alkinen zu Vinylchloriden mit hoher Chemo‐ und Stereoselektivität. Das katalytische System vereint breite Substratverträglichkeit, vereinfachte Abtrennung und Wiederverwertbarkeit ...
Marc‐Eduard Usteri, Eva J. Meeus, Christian Zachau, Seung‐Eun Choi, Aram Bugaev, Milivoj Plodinec, Sharon Mitchell, Bill Morandi, Javier Pérez‐Ramírez   +8 more
wiley   +1 more source