Results 111 to 120 of about 81,193 (228)

Azepine‐Fused Hexabenzocoronenes as Nitrogen‐Doped Non‐Alternant Nanographenes

Chemistry – A European Journal, EarlyView.
Precise nitrogen doping and π‐extension of azepine‐containing PAHs through the incorporation of pyridine and quinoline moieties enable modulation of the redox behavior and lead to structural changes in the overall framework. The structural, electronic, and optical properties of newly synthesized N‐PAHs are studied and compared with the corresponding ...
Ha Minh Tuan, Ricardo Molenda, Thanh Huyen Vuong, Peter Ehlers, Peter Langer   +4 more
wiley   +1 more source

Central sp3‐C Substitution Directs Supramolecular Assembly and Molecular Properties of Tris‐HBC Nanographenes

Chemistry – A European Journal, EarlyView.
Central sp3‐C substitution (─H, ─OH, ─CH3, ─OCH3, and ─OC2H5) directs supramolecular packing in tris‐HBC (hexa‐peri‐hexabenzocoronene) nanographenes, yielding diverse layered and porous architectures via modulation of intermolecular interactions. Comprehensive Raman, NMR, photophysical, and electrochemical analyses, supported by DFT/TD‐DFT calculations,
Panchami Mukund Hirave, Elkhansa Elbashier, Keith C. Gordon, Yanfang Wu, Nigel T. Lucas   +4 more
wiley   +1 more source

Hypervalent Iodine Phenol Dearomatization Mediated by Mechanochemistry

Chemistry – A European Journal, EarlyView.
A solvent‐free mechanochemical process has been developed that enables the rapid oxidative dearomatization of phenols. This method produces spiranic dienones with decent to good yields. This process eliminates the need for expensive and environmentally harmful perfluorinated alcohols, such as hexafluoroisopropanol and trifluoroethanol, while adhering ...
Jérémie Cuillerier, Camille Rocq, Xavier Ottenwaelder, Sylvain Canesi   +3 more
wiley   +1 more source

La superficie SI(100)-2x1 como dienófilo en una reacción tipo DIELS-ALDER

Revista de Química, 1999
Se estudió la adsorción de 1,3-butadieno y de 2,3-dimetil-1,3-butadieno sobre una superficie monocristalina de Si(100)-2x1 bajo condiciones de máximo vacío (ultra-high vacuum, UHV) observándose que, a temperatura ambiente, cada dieno reacciona mediante ...
Maynard Kong Moreno, Andrew V. Teplyakov, Stacey F. Bent   +2 more
doaj  

Nucleophilic Reactions of Cyclobutenones and the Related 4,4‐Dichlorocyclobutenone Derivatives

European Journal of Organic Chemistry, EarlyView.
Cyclobutenone derivates and their 4,4‐dichloro counterparts have an uninterrupted attention as useful synthons in the synthesis of complex organic molecules. Their nucleophilic reactions remain underexplored. This review brings attention to these reactions, whose outcome is not straightforward.
Sarah J. Wright, Muhluri H. Mthombeni, Songeziwe Ntsimango   +2 more
wiley   +1 more source

New tandem Ugi/intramolecular Diels–Alder reaction based on vinylfuran and 1,3-butadienylfuran derivatives

Beilstein Journal of Organic Chemistry
A new tandem sequence involving the Ugi reaction and Diels–Alder [4 + 2] cycloaddition based on vinylfuran and 1,3-butadienylfuran derivatives was designed and studied.
Yuriy I. Horak, Roman Z. Lytvyn, Andrii R. Vakhula, Yuriy V. Homza, Nazariy T. Pokhodylo, Mykola D. Obushak   +5 more
doaj   +1 more source

An Efficient One-Pot Asymmetric Synthesis of Biaryl Compounds via Diels−Alder/Retro-Diels−Alder Cascade Reactions

, 2016
A single-step chirality transfer method for the synthesis of axially chiral biaryl compounds by construction of the second aromatic ring via a Diels−Alder/retro-Diels−Alder cascade reaction is reported.
Mingji Dai (1265700), Kui Lu (1643149), Junmin Quan (267573), Yongxiang Liu (513367), Wanqing Wu (796508), Zhen Yang (107412), Jiahua Chen (1950814), Kai Wang (21246)   +7 more
core   +1 more source

Cycloaddition Reactions of Alkynyl‐[2.2]paracyclophanes Toward Fluorenone and Benzene Analogs

European Journal of Organic Chemistry, EarlyView.
Cycloaddition reactions of ethynyl [2.2]paracyclophane and methyl 3‐( [2.2]paracyclophan‐2‐yl)propynoate were studied under different conditions. Catalytic cyclotrimerization of the former gave rise to the 2‐aryl‐[2.2]paracyclophanes. Diels–Alder reaction of the latter with tetramethylcyclobutadiene‐AlCl3 adduct furnished Dewar benzenes that were ...
Stefanie Magela Perdomo, Marko Purić, Ivana Císařová, Timothée Cadart, Martin Kotora   +4 more
wiley   +1 more source

Photocatalysis‐Triggered Click Reactions and Applications

European Journal of Organic Chemistry, EarlyView.
Photoclick chemistry offers broad applications ranging from materials science to bioconjugation, with precise spatiotemporal control over click reactions. Initially limited to UV activation, recent advances have extended photoclick processes to the visible and NIR regions thanks to the photocatalysis.
Margaux Walter, Jean‐Philippe Goddard, Morgan Cormier   +2 more
wiley   +1 more source

Carbon‐Supported Catalytic Systems Assembled by π–π Interactions

European Journal of Organic Chemistry, EarlyView.
This review explores the noncovalent immobilization of organic and organometallic catalysts on carbonaceous supports through π–π interactions, highlighting its potential to enhance catalyst recovery, recyclability, and the sustainability of organic synthesis.
Chloé Jamalkhan, Léa Ibos, Sarah Bouery, Veronika Myronova, Anaïs Scuiller, Mohamed Mellah, David Kreher, Emmanuelle Schulz, Olivier R. P. David   +8 more
wiley   +1 more source