Results 31 to 40 of about 34,105 (267)
X=Y–ZH compounds as potential 1,3-dipoles. Part 64: Synthesis of highly substituted conformationally restricted and spiro nitropyrrolidines via Ag(I) catalysed azomethine ylide cycloadditions [PDF]
, 2008 1,3-Dipolar reactions of imines of both acyclic and cyclic α-amino esters with a range of nitroolefins using a combination of AgOAc or Ag2O with NEt3 are described.
Albert +51 more
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An update on the synthesis and reactivity of spiro-fused β-lactams [PDF]
, 2018 Beta-Lactam ring-containing compounds play a pivotal role in drug design and synthetic chemistry. Spirocyclic beta-lactams, representing an important beta-lactam subclass, have recently attracted considerable interest with respect to new synthetic ...
D'hooghe, Matthias, Dao Thi, Hang
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Nanoparticle‐Catalysed 1,3‐Dipolar Cycloadditions
European Journal of Organic Chemistry, 2020 The 1,3‐dipolar cycloadditions of azomethine‐ylides and ‐imines, nitrones, nitrilimines, and azides catalysed by inorganic nanoparticles are described. Emphasis is given to the nanometric catalysts involved, their structure, characterisation, and recyclability and, when remarkable, their preparation.
Ponti A., Molteni G.
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Dynamic Catalytic Highly Enantioselective 1,3‐Dipolar Cycloadditions [PDF]
Angewandte Chemie International Edition, 2021 AbstractIn dynamic covalent chemistry, reactions follow a thermodynamically controlled pathway through equilibria. Reversible covalent‐bond formation and breaking in a dynamic process enables the interconversion of products formed under kinetic control to thermodynamically more stable isomers.
Yildirim, O +5 more
openaire +7 more sources
Angewandte Chemie, EarlyView.Cross‐coupling/homologation sequence between a stable three‐membered‐ring carbene and isocyanides enables facile and rapid access to novel methyleneketenimines and the first bis(methyleneketenimine). Reactivity studies gave rise to the first methyleneketenimine‐transition metal complexes, unique multimodal reactivity ranging from CO2, isocyanate ...
Taichi Koike +3 more
wiley +2 more sources
N-Alkylated dinitrones from isosorbide as cross-linkers for unsaturated bio-based polyesters
Beilstein Journal of Organic Chemistry, 2014 Isosorbide was esterified with acryloyl chloride and crotonic acid yielding isosorbide diacrylate (9a) and isosorbide dicrotonate (9b), which were reacted with benzaldehyde oxime in the presence of zinc(II) iodide and boron triflouride etherate as ...
Oliver Goerz, Helmut Ritter
doaj +1 more source
Beilstein Journal of Organic Chemistry, 2008 Copper-catalyzed, thermal or microwave promoted 1,3-dipolar cycloaddition (Click Reaction) of 2-propynyl and 3-butynyl 2,3,4-tri-O-acetyl-6-azido-6-deoxy-glycopyranosides in the D-gluco, D-galacto and D-manno series afford the corresponding dimeric ...
Nikolas Pietrzik +2 more
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Molecules, 2019 The alkylation of a series of nitroindazole derivatives with 1,2-dibromoethane afforded the corresponding N-(2-bromoethyl)- and N-vinyl-nitro-1H-indazoles.
Mohammed Eddahmi +9 more
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Büchwald-Hartwig reaction applied to synthesis of new luminescent liquid crystal triarylamines derived from isoxazoles [PDF]
, 2015 © 2015 Taylor & Francis Group, LLC. The present work describes the synthesis and characterization of novel series of triarylamines isoxazoles (TAA) addressed to the organic photovoltaic materials. Diarylisoxazoles were synthesized by sequential [3+2] 1,
Fernandes, T. H. M. +3 more
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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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