Results 41 to 50 of about 2,266 (161)

Cross‐Dehydrogenative Coupling Reactions With Redox‐Active Guanidine Reagents

Chemistry – A European Journal, EarlyView.
ABSTRACT Cross‐dehydrogenative coupling (CDC) reactions are attractive and environmentally friendly ways to form new C‐C and other element‐element bonds. Here, we report the first CDC reactions triggered by a redox‐active guanidine reagent. N‐phenyltetrahydroisoquinoline and derivatives with electron‐donating and withdrawing substituents at the N ...
Petra Walter, Olaf Hübner, Hans‐Jörg Himmel   +2 more
wiley   +1 more source

Stereochemical Control in the Matteson Reaction

Chemistry – A European Journal, EarlyView.
The Matteson homologation is a highly versatile method for the stereoselective insertion of carbenoids into boronic esters. Through iterative application of the process, complex chiral molecules can be synthesized. The stereoselectivity of the reaction is determined by a chiral diol incorporated in the boronic ester.
Hae Mo Lee, Christoph Hirschhäuser
wiley   +1 more source

Modular One‐Pot Access to π‐Expanded Tetrakis(Phenothiazinyl)‐Silanes With Broadly Tunable Redox and Emission Properties

Chemistry – A European Journal, EarlyView.
A library of 21 tetrakis(phenothiazinyl)‐substituted silanes with broadly variable substituent decoration, which are fully reversible multistage redox systems with intense tunable emission from deep blue to yellow–green (441–533 nm), was rapidly synthesized by bromine–lithium exchange/borylation–Suzuki coupling of tetrakis(4‐bromophenyl)silane or by ...
Thomas P. M. Merke, Lysander Presser, Leonard Karl, Christian Ganter, Thomas J. J. Müller   +4 more
wiley   +1 more source

Metal‐Free Ligand‐Centered Radical Scavenging in Pyridine‐Modified Tetraaza Macrocycles

European Journal of Organic Chemistry, EarlyView.
Ligand‐centered hydrogen‐atom transfer in pyridinophane macrocycles generates delocalized radicals, with Py2N2 enabling cooperative captodative stabilization and enhanced DPPH• quenching. Pyridine‐modified tetraaza macrocycles are widely studied as ligand platforms for metal coordination, yet their intrinsic redox and radical reactivity in the absence ...
Christina Mantsorov, Hannah K. Pyle, Tahmina Afroz, Caden‐Jack N. Walls, Nora Del Bosque, Timothy M. Schwartz, Chelsea N. Miller, Kristof Pota, Benjamin G. Janesko, Kayla N. Green   +9 more
wiley   +1 more source

Using a social‐ecological macrosystems framework to understand how human activities alter ecological synchrony

People and Nature, EarlyView.
Abstract Different aspects of ecological systems, biotic or abiotic, often fluctuate in coordinated patterns over space and time. Such high concordance between ecological processes is often referred to as ecological synchrony. Human activities, including and beyond climate change, have the potential to alter ecological synchrony by disrupting or ...
Yiluan Song, Mallory Barnes, K. Ann Bybee‐Finley, Kyla M. Dahlin, Travis McDevitt‐Galles, Stephan B. Munch, Guillermo E. Ponce‐Campos, Casey Youngflesh, Benjamin Zuckerberg, Kai Zhu   +9 more
wiley   +1 more source

Nitroflavone Derivatives Inhibit the Production of Actinorhodin in Streptomyces coelicolor

Current Issues in Molecular Biology
Streptomyces coelicolor M145 (SC) is a model strain characterised by its highly active oxidative metabolism. This results in high levels of oxidative stress and the production of actinorhodin (ACT), a blue polyketide pigment with antioxidant properties ...
Sana Slimene, Michelle David, Daniel Dauzonne, Renato Bensasson, Marie-Joelle Virolle, Fathi Moussa   +5 more
doaj   +1 more source

Computational design of poly(p‐phenylene vinylene)‐based gas sensors: tunable reactivity and selectivity via side‐group functionalization

Polymer International, EarlyView.
Side‐group functionalization enhances the reactivity and optoelectronic properties of poly(p‐phenylene vinylene) (PPV) derivatives for chemical sensing. PPV‐CN and PPV‐NO2 display strong interactions and pronounced responses, providing molecular‐level insights for designing high‐performance polymer‐based sensors.
Bruno Hori Barboza, Rosangela A Maia, João Paulo Cachaneski‐Lopes, Augusto Batagin‐Neto   +3 more
wiley   +1 more source

Quantitative Analysis of Substituent Effects in Cu(II) and Co(II) Benzimidazole Complexes: Stability Constants Determined via Acetate-Mediated Synthesis and Benesi–Hildebrand Method Correlated with Hammett σ Parameters

Chemistry
This study presents a quantitative investigation of substituent effects on the stability of 1:2 complexes formed between para-substituted 2-phenylbenzimidazole ligands and Cu(II) or Co(II) ions.
Zoltán Köntös, Flóra Stedra, Viktória Ngo Hang   +2 more
doaj   +1 more source

Outer‐Sphere Tuning of Synthetic Iron–Sulfur Clusters Within Nanoscale Cage Frameworks

Small, EarlyView.
Noncovalent encapsulation of a synthetic iron–sulfur cluster within hydrophobic, naphthalenediimide (NDI)‐paneled cages is shown to lead to dramatic changes in the electronic structure and covalency of the Fe─S core. ABSTRACT As atomic‐scale archetypes for multi‐electron transfer, iron–sulfur clusters are compelling candidates for the design of redox ...
Rupal Baliyan, Shelby T. Davis, Jan‐Niklas Boyn, Gwendolyn A. Bailey   +3 more
wiley   +1 more source

Creating a Masterpiece. The Road to (and Beyond) Woodward and Hoffmann's 1969 Angewandte Chemie Treatise

The Chemical Record, EarlyView.
This publication describes how R. B. Woodward and Roald Hoffmann crafted their masterpiece publications. Illustrations include Woodward's first draft of the famous “Violations There are none. Nor can violations be expected of so fundamental a principle of maximum bonding.” Original but discarded text shows the stepwise paths toward the W‐H masterpieces.
Jeffrey I. Seeman
wiley   +1 more source