Results 71 to 80 of about 13,292 (250)

Mechanochemistry: Fundamental Principles and Applications

Advanced Science, Volume 12, Issue 24, June 26, 2025.
In this review, the physicochemical principles of mechanochemistry are first clarified. Based on this foundation, the research basis and cutting‐edge scientific achievements in four areas are introduced: solid‐state organic chemistry, polymers, interface science, and biomechanochemistry.
Liang Dong, Luofei Li, Huiyan Chen, Yi Cao, Hai Lei   +4 more
wiley   +1 more source

Addition of lithiated enol ethers to nitrones and subsequent Lewis acid induced cyclizations to enantiopure 3,6-dihydro-2H-pyrans – an approach to carbohydrate mimetics

Beilstein Journal of Organic Chemistry, 2010
A stereodivergent synthesis of enantiopure 3,6-dihydro-2H-pyrans is presented. The addition of lithiated enol ethers to carbohydrate-derived nitrones afforded syn- or anti-configured hydroxylamine derivatives 4a–d that were cyclized under Lewis acidic ...
Fabian Pfrengle, Hans-Ulrich Reissig
doaj   +1 more source

Synthesis of new enantiopure poly(hydroxy)aminooxepanes as building blocks for multivalent carbohydrate mimetics

Beilstein Journal of Organic Chemistry, 2014
New compounds with carbohydrate-similar structure (carbohydrate mimetics) are presented in this article. Starting from enantiopure nitrones and lithiated TMSE-allene we prepared three 1,2-oxazine derivatives which underwent a highly stereoselective Lewis
Léa Bouché, Maja Kandziora, Hans-Ulrich Reissig   +2 more
doaj   +1 more source

Synthesis of 1,2-Oxazinanes via Hydrogen Bond Mediated [3 + 3] Cycloaddition Reactions of Oxyallyl Cations with Nitrones.

Organic Letters, 2018
Reported herein is the development of [3 + 3] cycloaddition reactions between oxyallyl cations and nitrones to yield 1,2-oxazinane heterocycles. Oxyallyl cation intermediates, generated in situ from α-tosyloxy ketones in the presence of hexafluoro-2 ...
Lingbowei Hu, Michael Rombola, V. Rawal
semanticscholar   +1 more source

Neuroprotection by Radical Avoidance: Search for Suitable Agents

Molecules, 2009
Neurodegeneration is frequently associated with damage by free radicals. However, increases in reactive oxygen and nitrogen species, which may ultimately lead to neuronal cell death, do not necessarily reflect its primary cause, but can be a consequence ...
Rüdiger Hardeland
doaj   +1 more source

The Electronic Spectra of Nitrones and the Solvent Effect on Them [PDF]

, 1963
Tanekazu Kubota, Masumi Yamakawa, Yutaka Mori   +2 more
openalex   +1 more source

Synthesis of Dyes with the Neocyanine Structure Presented by Brooker, and Related Dyes. IV. Structure of the Dyes Obtained by the Condensation of 3-Ethyl-2-methylbenzothiazolium Iodide with Nitrone or Anil Derivatives [PDF]

, 1960
Shiro Kimura
openalex   +1 more source

Copper-Catalyzed Selective N-Vinylation of 3-(Hydroxyimino)indolin-2-ones with Alkenyl Boronic Acids: Synthesis of N-Vinyl Nitrones and Spirooxindoles.

Journal of Organic Chemistry, 2017
A copper-catalyzed selective cross-coupling reaction of 3-(hydroxyimino)indolin-2-ones with alkenyl boronic acids to access (E)-N-vinyl oxindole nitrones has been achieved under mild conditions.
Chunhua Chen, Qing-qing Liu, Xiao-Pan Ma, Yu-Quan Feng, Cui Liang, Cheng-Xue Pan, Gui-Fa Su, Dong‐Liang Mo   +7 more
semanticscholar   +1 more source

Synthesis of a New Chiral Pyrrolidine

Molecules, 2010
The synthesis of a new chiral pyrrolidine has been performed using 2,3-O-isopropylidene-D-erythronolactol as a suitable starting material.
Pilar García, Enrique F. Iglesias, Isidro S. Marcos, Narciso M. Garrido, Rosalina F. Moro, Marta G. Núñez, Mari Fe. Flores, David Díez   +7 more
doaj   +1 more source

The Synthesis of 5-Aminoisoxazolidines by the 1,3-Dipolar Cycloaddition Reaction of Nitrones with Enamines [PDF]

, 1970
Yujiro Nomura, Fumio Furusaki, Yoshito Takeuchi   +2 more
openalex   +1 more source