Results 111 to 120 of about 150,649 (280)

PROMOVAREA INSTRUIRII PRIN CERCETARE ÎN CURRICULUM LA CHIMIE ÎN BAZA CONCEPTULUI STEAM

Studia Universitatis Moldaviae: Stiinte ale Educatiei
Studiul include analiza Curriculum-ului modernizat în 2019 la Chimie. Sunt anlizate elementele cercetării în curriculum și ponderea lor în raport cu numărul total de ore per clasă și ciclu de studii.
USM ADMIN
doaj  

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

D’une science à l’autre : Chimie et manuscrits médiévaux. Étapes d’une évolution

Bulletin du Centre d’Études Médiévales d’Auxerre, 2006
Claude Coupry
doaj   +1 more source

Chan–Lam Cross‐Coupling With Alkylboron Reagents: From Transmetallation to Radical Pathways

European Journal of Organic Chemistry, EarlyView.
Alkylative Chan–Lam coupling overcomes intrinsic transmetallation limitations of alkylboron reagents by engaging radical pathways. Recent advances reveal how radical and radical–polar crossover mechanisms enable mild C(sp3)—heteroatom bond formation. This minireview highlights key mechanistic insights and emerging strategies that transform alkylboron ...
Nicolas G.‐Simonian, Andrea Serafino, Luc Neuville, Géraldine Masson   +3 more
wiley   +1 more source

Visible‐Light‐Promoted, (Photo)catalyst‐Free Synthesis of 3‐Sulfonyl‐Azaspiro[4.5]trienones via Arylazo Sulfones

European Journal of Organic Chemistry, EarlyView.
A set of 3‐sulfonyl‐azaspiro[4.5]trienones have been obtained via a metal‐ and photocatalyst‐free visible‐light‐driven dearomative strategy. The protocol exploits arylazo sulfones, which act simultaneously as the light absorber and sulfonyl‐radical source, enabling ipso‐spirocyclization of differently substituted N‐aryl propiolamides.
Luca Nicchio, Giulia Pompilio, Maurizio Fagnoni, Luc Neuville, Géraldine Masson, Stefano Protti   +5 more
wiley   +1 more source

Vers la matière complexe : Chimie ? Chimie ! [PDF]

Reflets de la physique, 2011
openaire   +2 more sources

Total Synthesis of Novel Oxylipins: Plasmodiophorols A, C, and Epimers

European Journal of Organic Chemistry, EarlyView.
The first total syntheses of plasmodiophorols A and C, recently identified α‐linolenic acid‐derived oxylipins, were achieved from chiral cyclopentafuranone in 12–13 steps. The routes use enzymatic desymmetrization, epimerization, and diastereoselective Grignard addition, providing stereocontrolled access to the natural products and reliable standards ...
Alexandre Guy, Aurélien Lebrun, Thierry Durand, Camille Oger   +3 more
wiley   +1 more source

Divergent Synthesis of Polycyclic Derivatives via Gold Catalysis

European Journal of Organic Chemistry, EarlyView.
Gold(I)‐catalyzed cycloisomerization enables the formation of complex 3D structures from simple enyne precursors. This study presents a divergent strategy to synthesize functionalized bicyclic and tricyclic scaffolds from a common alkynyl ketone.
Emilie Gentilini, Vincent Davenel, Pierre Ligonès, Jean‐Marie Fourquez, Véronique Michelet   +4 more
wiley   +1 more source

Design, Synthesis, and Photophysical Studies of Functionalized Polyaromatic Isonitriles as Visible Light Photoredox Catalysts

European Journal of Organic Chemistry, EarlyView.
A new series of structurally rich polyaromatic isonitriles is presented as photoredox catalysts. Their photophysical properties are investigated by UV–Vis absorption and fluorescence measurements, combined with experimental and theoretical studies to evaluate both ground‐ and excited‐state redox properties.
Cristina Martini, Camilla Russo, Jussara Amato, Carmine Volpe, Francesca Brunelli, Laurence Grimaud, Maxime R. Vitale, Greta Donati, Andrea Basso, Mariateresa Giustiniano   +9 more
wiley   +1 more source

Importance économique du Port Autonome de Liège: rapport 2003 [PDF]

The Port Autonome de Liège, with its 26 kilometres of berths and several multimodal platforms, plays an important role in the Walloon and Belgian economy.
Frédéric Lagneaux
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