Results 21 to 30 of about 40,715 (135)
Photo‐controlled Release of Urea Enables the Detection of Urea‐Urease Intermediates by cryo‐FTIR
Angewandte Chemie International Edition, Accepted Article.Caged compounds are a valuable tool to photocontrol the release of enzymatic substrates in a reaction. For example, caged urea molecules were proposed to control urea delivery to urease reactions and aid the determination of the catalytic mechanism of this enzyme.
Caterina Netto +7 more
wiley +1 more source
Origin of Room Temperature Methanol Synthesis over Hcp‐PdMo
Angewandte Chemie International Edition, EarlyView.The hexagonal close‐packed PdMo (hcp‐PdMo) intermetallic catalyst exhibits the room temperature catalytic activity for CO2 hydrogenation to methanol, where the adjacently arranged Pd and Mo sites play important roles in methanol synthesis. Mechanism study revealed that the reaction proceeds via a reverse water‐gas shift and subsequent CO hydrogenation (
Feilong Xing +7 more
wiley +1 more source
Angewandte Chemie International Edition, Accepted Article.Pseudouridine‐5’‐triphosphate (ΨTP) and the N1‐methylated derivative (m1ΨTP) are critical monomer building blocks of the currently used mRNA vaccines, yet efficient methods of their synthesis from readily accessible substrates remain underdeveloped. We herein report notably atom‐economic and high‐yielding biocatalytic route toward ΨTP (83% yield) and ...
Martin Pfeiffer +4 more
wiley +1 more source
High‐Pressure Synthesis of Nitrogen‐rich Y(N5)3·N2 Pentazolate with Perovskite Topology
Angewandte Chemie International Edition, Accepted Article.The discovery and stabilization of the cyclo‐N5⁻ anion have introduced a class of pentazolate compounds with significant potential as high‐energy‐density materials. This potential could be further enhanced by increasing the pentazolate‐to‐metal ratio. Here, we report the high‐pressure high‐temperature synthesis and characterization of a novel yttrium ...
Andrey Aslandukov +8 more
wiley +1 more source
Reactivity of Pnictaalumenes towards 1,3‐Dipole Molecules
Angewandte Chemie International Edition, Accepted Article.Alkynes undergo 1,3‐dipolar cyclisation reactions with organic azides giving 1,2,3‐triazoles. Pnictaalumenes RPn=AlRˈ are the isoelectronic congeners of alkynes, hence a similar reactivity towards 1,3‐dipole molecules is expected. Herein, we report the reactions of DippTerPn=AlCp* (DippTer = 2,6‑(2,6‐iPr2C6H3)‐C6H3, Cp* = [Me5C5]−, Pn = P, As) towards ...
Tim Wellnitz +7 more
wiley +1 more source
Angewandte Chemie International Edition, Accepted Article.We describe the identification of an active Ti(salen)‐catalyst for the radical arylation of epoxides by a CV study of mechanism‐based predictors, such as the redox potentials of the complexes and their EqCr‐equilibria, for the success of catalysis. Surprisingly, the by far most active catalyst features an uncommon tetrasubstituted ligand backbone that ...
Andreas Gansäuer +6 more
wiley +1 more source
MOF Coating Enhances the Ion Tolerance of Micromotors
Angewandte Chemie International Edition, EarlyView.This work reported a novel method to significantly enhance the ion tolerance of EMNMs using a MOF coating via controllable heteroepitaxial growth, enabling effective motion in high‐salt environments and propulsion through biological tissues under 980 nm NIR light, with potential applications in targeted drug delivery.
Leyan Ou +10 more
wiley +1 more source
Angewandte Chemie International Edition, Accepted Article.Catalytic asymmetric 1,3‐dipolar cycloadditions (1,3‐DCA) using iminoesters as ylide precursors offer a powerful approach to accessing stereochemically complex, biologically relevant pyrrolidines. While previous studies have already achieved impressive stereoselectivities, catalytic productivity remains a challenge, with turnover numbers (TON ...
Adrian Bürstner +13 more
wiley +1 more source
Angewandte Chemie International Edition, EarlyView.A highly enantioselective iridium‐catalyzed hydroarylation of allene‐tethered pyrroles and indoles that provides access to relevant heterocyclic systems bearing vinyl‐substituted 3ry or 4ry stereocenters is reported. Its synthetic potential was exemplified with a very short, highly enantioselective formal synthesis of (+)‐Rhazinilam, whereas DFT ...
Andrés Arribas +4 more
wiley +1 more source
Angewandte Chemie International Edition, Accepted Article.The structure and reactivity of methylaluminoxane (MAO), a reagent of major interest for olefin polymerization, both industrially and academically, has been probed using ultra‐high magnetic field solid‐state NMR spectroscopy (28.2 T, 1200 MHz for 1H Larmor frequency). High resolution methods combined with density functional calculations allowed for the
Kai C. Szeto +8 more
wiley +1 more source