Results 91 to 100 of about 24,493 (253)

Hole‐Activated Lattice Oxygen Enables Pt‐Free Propane Dehydrogenation by Eliminating the Hydrogen Recombination Bottleneck

Angewandte Chemie, EarlyView.
Trace Mg doping into gallia–alumina generates hole‐type oxygen species that accelerate hydrogen recombination, eliminating the need for Pt promotion. The fully oxide‐based catalyst resists sintering under repeated regeneration, outperforming benchmark PtSn and CrOx catalysts with exceptional stability over 30 dehydrogenation–regeneration cycles ...
DongHwan Oh, Jaewoo Jeong, Susung Lee, Younghwan Park, Seunghyuck Chi, Yaejun Baik, Hyungjun Kim, Hyeyoung Shin, Minkee Choi   +8 more
wiley   +2 more sources

Implantation‐On‐Chip: An AI‐Based Platform for Monitoring the Embryo Trophoblast–Endometrial Stroma Cross Talk With Xenobiotics Interference

Advanced Intelligent Systems, EarlyView.
We present a novel AI‐integrated implantation‐on‐chip platform that enables mimicking and monitoring the maternal–fetal interactions at the early phases of human embryo implantation with high spatiotemporal resolution. The complexity of the trophoblast invasion process was addressed by conducting the analysis at global (rate of invasion) and local ...
Joanna Filippi, Valentina Lacconi, Arianna Mencattini, Micol Massimiani, Dolores Lobresca, Gaia Posanzini, Alessia Riccardi, Paola Casti, Michele D’Orazio, Gianni Antonelli, Giorgia Curci, Luisa Campagnolo, Eugenio Martinelli   +12 more
wiley   +1 more source

The Azidofunctionalization of Alkenes

ChemistryEurope
The azidofunctionalization of alkenes has emerged as a powerful difunctionalization strategy, expanding the toolbox of synthetic chemistry. This transformation enables the simultaneous installation of an azide and a second functional group onto an alkene,
Pierre Palamini, Jerome Waser
doaj   +1 more source

Thermally Stable Organic Synaptic Transistors Using a High‐Tg Polymer Electret

Advanced Intelligent Systems, EarlyView.
A high–glass‐transition‐temperature cyclic olefin copolymer (COC) electret enables thermally stable organic synaptic transistors for neuromorphic operation in harsh environments. UV–ozone treatment increases the trap density in COC, providing robust multilevel conductance and key synaptic functions (excitatory postsynaptic current/ inhibitory ...
Hoyoung Cho, Bombi Kim, Kyoungeun Lee, Moohyun Kim, Chaegwang Lim, Yeyun Bae, Jaeyeop Lee, Jiyoon Oh, Hyeok Kim, Jeongkyun Roh   +9 more
wiley   +1 more source

Isolable C‐Phosphonio‐Boratavinyl Anion

Angewandte Chemie, EarlyView.
A persistent C‐phosphonio boratavinyl anion was successfully synthesized. This boron‐containing vinyl lithium, featuring a vinyl carbon with an excessively high negative charge, exhibits remarkable nucleophilic and basic character, which was demonstrated by the result of a rapid reaction with H2 at RT.
Huihui Xu, Aurora Rodríguez‐Álvarez, Md Jabed Hossain, Antoine Baceiredo, Eddy Maerten, Nathalie Saffon‐Merceron, Vicenç Branchadell, Tsuyoshi Kato   +7 more
wiley   +2 more sources

Synthese Unkonventioneller α‐Polyhalogenierter Amine Durch Hydroaminoalkylierung

Angewandte Chemie, EarlyView.
Es wird ein redox‐neutrales Verfahren beschrieben, bei dem Alkene und Alkine unter Verwendung stabiler Hemiaminal‐Reagenzien in α‐Polyhalogenmethylamine umgewandelt werden. Dieser Ansatz ermöglicht den Zugang zu α‐CF3‐, α‐CF2H‐, α‐CF2Cl‐, und α‐CFClH‐Aminen und besticht durch ein breites Substratspektrum, eine hohe Toleranz gegenüber funktionellen ...
Angela K. Hofmeister, Giulia Iannelli, Péter Angyal, Augustin Malandain, Daniel Kaiser, Boris Maryasin, Hanspeter Kählig, Matteo Barel, Gaia Novarino, Nuno Maulide   +9 more
wiley   +1 more source

Kinetic Analysis of Transmetalation at Prototypical Nickel(II) Catalyst Species: Rates, Mechanisms, and Implications for Catalysis

Angewandte Chemie, EarlyView.
A 31P{1H} NMR method enabling direct measurement of transmetalation at Ni(II) is disclosed, providing an extensive kinetic dataset. Rates span five orders of magnitude and exhibit strong ligand dependence, with monodentate ligands promoting transmetalation.
Nicholas S. D. Solomon, Xuechun Huang, Christopher Richardson, Sinead T. Keaveney   +3 more
wiley   +2 more sources

A Wagner–Meerwein‐Like Rearrangement Generates a Vinyl Group in the Biosynthesis of the Polychlorinated Lipopeptides Fischerazoles

Angewandte Chemie, EarlyView.
The fischerazoles, unusual cyanobacterial chlorinated lipopeptides are reported. During their biosynthesis, a linear fatty acyl‐acyl carrier protein (ACP) precursor is rearranged through the action of the S‐adenosyl‐methionine (SAM)‐dependent methyltransferase FshF, to generate a pendant vinyl group.
Sandra A. C. Figueiredo, Kathleen Abt, Konrad Viehrig, Peter J. Jervis, Teresa P. Martins, Iñaki Lacomba, Chuhan Li, Daniele Castagnolo, Pedro N. Leão   +8 more
wiley   +2 more sources

Biosynthese des vollständig gesättigten C16‐Homosesquiterpens Descartan durch Deprotonierung mit Cyclopropanierung

Angewandte Chemie, EarlyView.
Eine nicht‐kanonische C16‐Sesquiterpensynthase aus Morganella morganii produziert das ungewöhnliche Grundgerüst Descartan. Ihr Cyclisierungsmechanismus wurde mittels Isotopenmarkierungsexperimenten und DFT‐Berechnungen aufgeklärt. Gezielte Mutagenese veränderte die Enzymfunktion und führte zu alternativen Produkten, darunter Voltairen, dessen ...
Kexin Yang, Philip Troycke, Bernd Goldfuss, Michael Groll, Jeroen S. Dickschat   +4 more
wiley   +1 more source

Exclusive Hydroformylation of Terminal Olefins: A Phosphorus‐Free Ruthenium System for the Selective Functionalization of Complex Mixtures

Angewandte Chemie, EarlyView.
Development of a phosphorus‐free Ru/DBU catalyst enabling highly chemo‐ and regioselective hydroformylation of terminal olefins, sparing internal double bonds. Optimization of reaction parameters, ligand effects, and substrate scope including industrial feedstocks was realized.
Mohamed Niyaz Vellala Syed Ali, Ida Ziccarelli, Dilver Peña Fuentes, Christoph Kubis, Robert Franke, Ralf Jackstell, Matthias Beller   +6 more
wiley   +2 more sources