Results 91 to 100 of about 12,240 (259)
, 2003 An efficient methodology for the synthesis of alpha-aminophosphonates has been developed taking advantage of the tert-butyldimethylsilyl triflate activated addition of diethyl phosphite to N-benzyl nitrones derived from chiral alpha-alkoxy and alpha-(Boc-
Gian Piero Pollini +9 more
core +1 more source
Estudo da reação entre furfurais hidroxilaminas : mecanismo de ataque por Pre-Associação e desidratação do intermediario de adição por catalise acida geral intramolecular [PDF]
, 1991 Dissertação (mestrado) - Universidade Federal de Santa Catarina. Centro de Ciencias Fisicas e MatematicasNeste trabalho estudou-se a reação de formação de oximas e nitronas a partir da reação de condensação entre furfurais e hidroxilaminas. Foram obtidos
Travalon, Silvana A. Azzolini
core
Cyclic nitrones - synthesis and applications
, 2006 In der vorliegenden Arbeit wird die Synthese von Piperazinon-Nitronen und ihr Einsatz in Cycloadditionsreaktionen mit α,β-ungesättigten Aldehyden beschrieben.
Freysoldt, Tonia H. E.
core +1 more source
BET & ELF Quantum Topological Analysis of Neutral 2-Aza-Cope Rearrangement of γ-Alkenyl Nitrones
Molecules, 2017 The 2-Aza-Cope rearrangement of γ-alkenyl nitrones is a rare example of the neutral thermal 2-aza-Cope process that usually takes place with cationic species.
Pedro Merino +3 more
doaj +1 more source
Organic Letters, 2018 Enoldiazosulfones undergo [3 + 3]-cycloaddition with nitrones when catalyzed by copper(I) catalysts, but not with dirhodium(II) catalysts. Under mild reaction conditions with chiral bisoxazoline ligands, copper(I) catalysts produce 1,2-oxazine-sulfone ...
Frady G. Adly +4 more
semanticscholar +1 more source
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
Monomeric, dimeric and tetrameric triazoles which also include nitrones
, 2017 The synthesis of some novel nitrones as part of molecules with a potential dual biological functionality is described. Novel aldehydes with 1,2,3-triazole linkers were synthesised and the nitrones were introduced by the classical methodology by reacting
Mohamed A. Ameen
core +1 more source
, 2016 The hydroxyl radical (•OH) is an important mediator of biological oxidative stress, and this has stimulated interest in its detection. 5,5-Dimethyl-1-pyrroline N-oxide (DMPO) and its alkoxycarbonyl and alkoxyphosphoryl analogues have been employed as ...
Christopher M. Hadad (1336719) +2 more
core +2 more sources
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
Organic and biomolecular chemistry, 2017 The [3 + 2] cycloaddition (32CA) reaction between nitrones and ketenes has been studied within the Molecular Electron Density Theory (MEDT) at the Density Functional Theory (DFT) MPWB1K/6-311G(d,p) computational level.
M. Ríos‐Gutiérrez +4 more
semanticscholar +1 more source