Results 61 to 70 of about 7,279 (220)
Molecules, 2015 Over the last several years there has been a huge increase in the development and applications of new efficient organocatalysts for enantioselective pericyclic reactions, which represent one of the most powerful types of organic transformations.
Felix E. Held +2 more
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Green Chemistry Letters and Reviews, 2022 Mechanochemistry is a powerful tool to develop environmentally benign syntheses of active pharmaceutical ingredients. In this context, we report here the synthesis of the anti-epileptic agent rufinamide through a one-pot sequential multi-component ...
Jorge Gómez-Carpintero +4 more
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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
Concerted [4 + 2] and Stepwise (2 + 2) Cycloadditions of Tetrafluoroethylene with Butadiene: DFT and DLPNO-UCCSD(T) Explorations. [PDF]
, 2020 Tetrafluoroethylene and butadiene form the 2 + 2 cycloadduct under kinetic control, but the Diels-Alder cycloadduct is formed under thermodynamic control. Borden and Getty showed that the preference for 2 + 2 cycloaddition is due to the necessity for syn-
Houk, KN +4 more
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Recent advances in the catalytic asymmetric 1,3-dipolar cycloaddition of azomethine ylides [PDF]
, 2014 Catalytic asymmetric 1,3-dipolar cycloadditions of azomethine ylides have turned out to be one of the most efficient methods for the preparation of enantioenriched pyrrolidines.
Adrio, Javier, Carretero, Juan C.
core +2 more sources
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
Regioselective and Enantioselective Nitrone Cycloadditions to Alkynones. [PDF]
, 2010 There has been a need in agriculture, medicine, and organic chemistry for enantiopure isoxazolines. A direct method for their synthesis is from the cycloaddition of 1,3-dipoles and alkynes.
Dunkle, Kelsey Lynn
core
The Huisgen Reaction: Milestones of the 1,3‐Dipolar Cycloaddition
Angewandte Chemie International Edition, 2020 AbstractThe concept of 1,3‐dipolar cycloadditions was presented by Rolf Huisgen 60 years ago. Previously unknown reactive intermediates, for example azomethine ylides, were introduced to organic chemistry and the (3+2) cycloadditions of 1,3‐dipoles to multiple‐bond systems (Huisgen reaction) developed into one of the most versatile synthetic methods in
Martin Breugst, Hans‐Ulrich Reissig
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(SP,SP)-(–)-(E)-1,2-Bis(methylphenylphosphinoyl)ethene
Acta Crystallographica Section E, 2009 The title compound, C16H18O2P2, possesses two stereogenic P atoms and shows a distorted s–cis conformation of each O=P—C=C moiety. This has been suggested on the basis of the stereochemical result of 1,3-dipolar cycloadditions with ...
doaj +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