Results 151 to 160 of about 27,319 (289)

Discovery of a Plant Pictet-Spenglerase With R-Stereoselectivity. [PDF]

Angew Chem Int Ed Engl
Morweiser C, Heinicke S, O'Connor SE, Colinas M.   +3 more
europepmc   +1 more source

Diastereoselective Copper‐Catalyzed Defluorosilylation of Pentafluoroethyl Alkenes to Access Polyfluorinated Allylsilanes

Chinese Journal of Chemistry, EarlyView.
Under copper(I) catalysis, pentafluoroethylated alkenes can undergo smooth defluorosilylation to generate novel polyfluorinated products. The reaction exhibits high levels of diastereoselectivities for obtaining multisubstituted allylsilanes with control of the double bond geometry.
Yuwei Zong, Yihan Tang, Gavin Chit Tsui
wiley   +1 more source

Beyond the two-conformer model: boat conformers provide stereoselectivity in S_N1-type glycosylations of <i>manno</i>-type donors. [PDF]

Chem Sci
Remmerswaal WA, Hoogers D, Schoenmakers J, Bickelhaupt FM, Hansen T, Codée JDC.   +5 more
europepmc   +1 more source

Learning Strategies from Nature's Blueprint to Cyclic Carbonate Synthesis

ChemSusChem, Volume 18, Issue 6, March 15, 2025.
The development of sustainable synthetic methods for cyclic carbonates draws inspiration from nature, focusing on eco‐friendly processes and renewable resources like CO2 and biomass. This review explore various CO2 activation mechanisms, green chemistry principles, and green catalysts.
Erika Saccullo, Vincenzo Patamia, Chiara Zagni, Antonio Rescifina, Giuseppe Floresta   +4 more
wiley   +1 more source

Gold Nanoparticles Supported on Poly(Phenylene Oxide) as Selective and Versatile Catalyst for Hydroamination of Arylacetylenes with Anilines

European Journal of Inorganic Chemistry, EarlyView.
Gold nanoparticles supported on poly(2,6‐dimethyl‐1,4‐phenylene oxide) (AuNPs‐PPO) demonstrates efficient and selective hydroamination, with performance tuned by reaction conditions and substrate design. Electron‐withdrawing substituents enhance conversion while preserving E‐imine selectivity, highlighting a key role of intermediate acidity.
Marta Aversa, Salvatore Impemba, Alessia Giannattasio, Irene Contento, Enrico Berretti, Alessandro Lavacchi, Carmine Capacchione, Alfonso Grassi, Antonio Buonerba   +8 more
wiley   +1 more source

1,1‐Disubstituted Vinylbromides: Versatile Building Blocks for the Synthesis of Nitrogen‐Containing Heterocycles

European Journal of Organic Chemistry, EarlyView.
1,1‐Disubstituted vinylbromides are key intermediates for constructing nitrogen‐containing heterocycles. This review provides an overview of the synthetic applications of 1,1‐disubstituted vinylbromides and summarizes recent developments in reaction methodologies, mechanistic insights, and the structural diversity of N‐heterocyclic compounds accessible
Anne Westermeyer, Jun Fang, Chonghuo Liu, Guillaume Lefèvre, Gérard Guillamot, Phannarath Phansavath, Virginie Ratovelomanana‐Vidal   +6 more
wiley   +1 more source

Synthesis of 2‐Aza‐Bicyclo[4.3.0]nonane Derivatives Related to the Camporidines via Intramolecular [3+2]‐Cycloaddition

European Journal of Organic Chemistry, EarlyView.
The intramolecular nitrile oxide olefin [3 + 2]‐cycloaddition offers a reliable entry toward 2‐aza‐bicyclo[4.3.0]‐nonanes, a substructure found in several bioactive piperidine alkaloids. The required oxime precursors were prepared in non‐racemic form by Ir‐catalyzed asymmetric allylation and ring‐closing metathesis.
Alicia Köcher, Tobias Wilczek, Nora Katharina Korber, Jörg-Martin Neudörfl, Bernd Goldfuss, Hans-Günther Schmalz   +5 more
wiley   +1 more source

Lithium Diisopropylamide‐Mediated Ring‐Opening of Tetrahydrofuran in the Synthesis of Polyhydroxylated Indolizidines

European Journal of Organic Chemistry, EarlyView.
Chiral tri‐ and pentahydroxy spirocyclopentane‐indolizidines were synthesized using lithium diisopropylamide “LDA” promoted diallylation and tetrahydrofuran “THF” ring‐opening in a one‐pot procedure as a key step. The sequence leading to the targeted hydroxy‐spiroindolizidines was achieved by cis‐dihydroxylation followed by reduction of the enamine and
Paula Fraňová, Peter Šafář, Marchalín Štefan, Petra Pažitná, Ivana Žídeková, Ján Moncol, Adam Daïch   +6 more
wiley   +1 more source

Synthesis of Novel C‐Acyl‐Glycosyl Sulfonamides via Pd‐Catalyzed Carbonylative Coupling

European Journal of Organic Chemistry, EarlyView.
A Pd‐catalyzed carbonylative coupling of 1‐iodo‐glycals with diverse sulfonamides using Mo(CO)6 enables efficient access to C‐acyl‐glycosyl sulfonamides.This robust and versatile strategy delivers novel glycoside derivatives in good to excellent yields, highlighting their potential for drug discovery.
João A. F. Silva, Mônica F. Z. J. Toledo, Flávia Manarin, João H. de Araujo‐Neto, Milene M. Hornink, Hélio A. Stefani   +5 more
wiley   +1 more source

Redox Properties of Catalytically Generated Iminium Ions From α,β‐Unsaturated Aldehydes and Chiral Secondary Amines

European Journal of Organic Chemistry, EarlyView.
We present a rapid, operationally simple, and broadly applicable protocol for the catalytic formation and in situ electrochemical characterization of chiral a,b‐unsaturated iminium ions by cyclic voltammetry (CV). Using only 5 mol% of the aminocatalyst, we systematically measure the reduction potential of over 50 iminium intermediates, revealing how ...
Martí Gisbert, Paula Rodríguez, Xavier Companyó   +2 more
wiley   +1 more source