Results 71 to 80 of about 7,313 (206)

1,3-Dipolar cycloadditions of 2-thio-3-chloroacrylamides with nitrile oxides and nitrones [PDF]

, 2010
1,3-Dipolar cycloadditions of 2-thio-3-chloroacrylamides with nitrile oxides and nitrones is described. A series of novel isoxazolines are isolated from the nitrile oxide cycloadditions, whilst the isoxazolines generated from the nitrone cycloadditions ...
Kissane, Marie, Lawrence, Simon E., Maguire, Anita R.   +2 more
core   +1 more source

Cascade oxime formation, cyclization to a nitrone, and intermolecular dipolar cycloaddition. [PDF]

, 2016
Simple haloaldehydes, including enolisable aldehydes, were found to be suitable for the formation of cyclic products by cascade (domino) condensation, cyclisation, dipolar cycloaddition chemistry.
Aasen, Ali, Ali, Burdisso, Burdisso, Burrell, Burrell, Burrell, Burrell, Coldham, Coldham, Coldham, Coldham, Coldham, Coldham, Davison, Denmark, Deno, Flick, Grashey, Grigg, Ha, Harry Adams, Heather E. Holberry, Huisgen, Hélène D. S. Guerrand, Iain Coldham, Ito, Jonathan R. Shewring, Laemmerhold, LeBel, Ma, Mulzer, Page, Pandey, Peng, Rachel C. Furnival, Revuelta, Rungroj Saruengkhanphasit, Rüeger, Sarkar, Sengoku, Shono, Siriwardena, Stockman, Suneel Kumar, Tufariello, Wilson, Yamato   +48 more
core   +1 more source

Synthesis of Sterically Shielded Nitroxides Using the Reaction of Nitrones with Alkynylmagnesium Bromides

Molecules, 2022
Sterically shielded nitroxides, which demonstrate high resistance to bioreduction, are the spin labels of choice for structural studies inside living cells using pulsed EPR and functional MRI and EPRI in vivo.
Sergey A. Dobrynin, Mark M. Gulman, Denis A. Morozov, Irina F. Zhurko, Andrey I. Taratayko, Yulia S. Sotnikova, Yurii I. Glazachev, Yuri V. Gatilov, Igor A. Kirilyuk   +8 more
doaj   +1 more source

Controlling Competitive Radical Pathways: Insights From Aryl Diazonium Electrografting

Chemistry – A European Journal, Volume 32, Issue 5, 2 February 2026.
This work shows that nitrobenzene diazonium electrografting results from competition between aryl and diazenyl radicals, which govern film composition. Using simulations and control strategies, grafting conditions are tuned to favor specific radicals. It enables selective formation of azo‐enriched films and paves the way toward the precise control of ...
Sara Helis, Jean Pinson, Philippe Decorse, Jonathan Hamon, Jean‐Marc Noël, Tony Breton   +5 more
wiley   +1 more source

Asymmetric Lewis acid-catalyzed 1,3-dipolar cycloadditions [PDF]

, 2017
Highly tuned, one-point binding chiral iron and ruthenium complexes selectively coordinate and activate α,β-unsaturated aldehydes and ketones toward asymmetric catalytic Diels-Alder cycloaddition reactions.
Brinkmann, Yasmin, Bădoiu, Andrei, Kündig, E. Peter, Viton, Florian   +3 more
core  

Ferrocene-derived P,N ligands : synthesis and application in enantioselective catalysis [PDF]

, 2013
Due to their unique steric and electronic properties, air-stability and modular structure, chiral hybrid P,N-ferrocenyl ligands play a prominent role in the field of asymmetric catalysis.
Noël, Timothy, Van der Eycken, Johan
core   +1 more source

Tailoring the Properties of Functional Materials With N‐Oxides

Advanced Functional Materials, Volume 36, Issue 17, 26 February 2026.
The properties of materials bearing N‐oxide groups are often dominated by the polar N+─O− bond. It provides hydrophilicity, selective ion‐binding, electric conductivity, or antifouling properties. Many of the underlying mechanisms have only recently been discovered, and the interest in N‐oxide materials is rapidly growing.
Timo Friedrich, Michelle Kobus, Shirin Mesgarha, Erica Moretto, Laurens Grosche, Wolfgang Maison   +5 more
wiley   +1 more source

Orbital symmetry control in the nitrone-oxaziridine system. Nitrone photostationary states [PDF]

Journal of the American Chemical Society, 1971
Recent the orbital symmetry rules have been shown to apply to hetero-atom systems such as nitrone thermal cycloaddition reactions and the thermal and photochemical aziridine ring cleavage at the C-C bond. The concerted photocyclization is disrotatory and the reverse thermal cleavage is conrotatory in these molecules with four {pi} electrons.
Splitter, Janet S, Su, Tah-mun, Ono, Howard, Calvin, Melvin   +3 more
openaire   +4 more sources

Introducing the Cis‐2,3‐Bis(trifluoromethyl)cyclopropyl Chemotype: Late‐Stage Installation and Stereoelectronic Properties

ChemistryEurope, Volume 4, Issue 2, February 2026.
The cis‐2,3‐bis(trifluoromethyl)cyclopropyl chemotype is introduced. The steric demand of this motif is intermediate between that of the heptafluoroisopropyl and prefluorotertbutyl groups; yet, it induces significantly less lipophilicity than these due to its facial polarity.
Daniel Gaviña, Zeyu Feng, David Herrero, Martin Simon, Christopher Golz, Manuel Alcarazo   +5 more
wiley   +1 more source

STUDY OF CYCLOREVERSION OF NTTRONE-CY CLODIMERS [PDF]

Journal of Sciences, Islamic Republic of Iran, 1993
A series of 1,3-dipolar cycloaddition reactions are carried out using cyclodimers of simple nitrones and various dipolarophiles; substituted isoxazolidines are isolated and identified.
doaj