Results 71 to 80 of about 41,109 (281)
Surface nano-patterning through styrene adsorption on Si(100) [PDF]
Phys. Rev. B 73, 125420 (2006) ., 2005 We present an ab initio study of the structural and electronic properties of styrene molecules adsorbed on the dimerized Si(100) surface at different coverages, ranging from the single-molecule to the full monolayer. The adsorption mechanism primarily involves the vinyl group via a [2+2] cycloaddition process that leads to the formation of covalent Si ...
arxiv +1 more source
ChemInform Abstract: Studies on 1,3‐Dipolar Cycloadditions
ChemInform, 2002 AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
openaire +3 more sources
Manganese‐Catalyzed Electrochemical Diazidation of Dehydroalanine Peptides
Advanced Science, EarlyView.A Mn(II)‐catalyzed electrochemical method achieves site‐selective diazidation of dehydroalanine peptides with NaN₃. This radical relay process tolerates diverse functional groups, delivers high yields, and enables precise peptide modification, offering a powerful tool for bioconjugation and therapeutic development.
Xinwei Hu +5 more
wiley +1 more source
Attempts to synthesize kainic acid [PDF]
, 1982 Attempts were made to synthesise a conformationally restricted analogue of kainic acid wherein the double bond was confined in a ring-system. The stratagem involved an intramolecular Diels-Alder reaction but could not be tested as the precursors to ...
Strachan, Calum H.
core
One Step Regioselective Synthesis of 5-Aminoisoxazoles from Nitrile Oxides and α-Cyanoenamines
Molecules, 2004 The 1,3-dipolar cycloaddition of nitrile oxides to 1-cyanoenamines gives 5-aminoisoxazoles regioselectively. Moderate to good yields could be obtained depending on the method used to generate the nitrile oxides. The intermediate isoxazolines could not be
Aïcha Derdour +2 more
doaj +1 more source
Allenylidenphosphonium‐Ion: Ein Isoelektronisches Phosphor‐Analogon Von [3]Kumulen
Angewandte Chemie, EarlyView.Wir berichten über die erste isolobale und isoelektronische Integration eines Phosphoratoms in ein [3]Kumulen. Dieses trigonal‐planare Phosphoniumallenyliden zeigt außergewöhnliche Lewis‐Acidität durch ein π*‐Akzeptororbital und weist eine einzigartige Reaktivität durch eine reversible intramolekulare dearomative [2+2]‐Cycloaddition auf ...
Lucas C. Torres +8 more
wiley +1 more source
Surface Grafting of Graphene Flakes with Fluorescent Dyes: A Tailored Functionalization Approach [PDF]
Nanomaterials 2025, 15, 329The controlled functionalization of graphene is critical for tuning and enhancing its properties, thereby expanding its potential applications. Covalent functionalization offers a deeper tuning of the geometric and electronic structure of graphene compared to non-covalent methods; however, the existing techniques involve side reactions and spatially ...
arxiv +1 more source
A multiconfigurational hybrid density-functional theory [PDF]
Journal of Chemical Physics 137, 4 (2012) 044104, 2012 We propose a multiconfigurational hybrid density-functional theory which rigorously combines a multiconfiguration self-consistent-field calculation with a density-functional approximation based on a linear decomposition of the electron-electron interaction.
arxiv +1 more source
Preparation of New Derivatives of Enaminolactones [PDF]
, 2015 The 1,3-dipolar cycloaddition reaction of Substituted benzyl azides and quomarinee was studied . Where interacted Substituted benzyl azides with quomarine produced seven vehicles of the type Inaminolactone (a, b, c, d, e, f, g).The 1,3-dipolar ...
Madwar, Rushdi., Shriteh, Thanaa
core +1 more source
Synthesis of Dinitrogen‐Fused Spirocyclic Heterocycles via Organocatalytic 1,3‐dipolar Cycloaddition of 2‐Arylidene‐1,3‐indandiones and an Azomethine Imine [PDF]
, 2016 An efficient 1,3‐dipolar cycloaddition of 2‐arylidene‐1,3‐indandiones with an azomethine imine has been developed to furnish spiroindane‐1,3‐dione‐pyrazolidinones in generally good to high yields with excellent diastereoselectivity under mild conditions ...
Cheng, Jing +3 more
core +1 more source