Results 21 to 30 of about 8,900 (267)
Palladium catalyzed N-arylation of hydroxylamines
, 2009 Over the past decade modified Ullmann couplings and palladium-catalyzed arylations of nitrogen contg. compds. (Buchwald-Hartwig aminations) have emerged as powerful tools in synthetic chem. Interestingly, despite their biol.
Tomkinson, Nicholas C. O. +1 more
core +3 more sources
Polyalkoxy Nitrones as Chiral Building Blocks in Asymmetric Synthesis
Molecules, 1999 Optically active nitrones derived from both aldoses and dialdoses add metallated heterocycles in a stereocontrolled way depending on the nature of the Lewis acid used as a precomplexing agent of the nitrone.
Tomás Tejero, Pedro Merino
doaj +1 more source
International Journal of Electrochemical Science, 2021 Nitroxyl radical catalysts oxidize alcohols under an applied electric potential. It is possible to quantify the alcohol concentration from the resulting oxidation current.
Sachiko Komatsu +10 more
doaj +1 more source
ChemistryOpen, 2022 A precursor‐directed approach to access N‐hydroxyalkyl phenylbenzoisoquinolindiones (PBIQs) has been developed. Incubation of plant material of Xiphidium caeruleum with hydroxylamines of various chain lengths (C2, C4, C6, C8, C10 and C12) resulted in 11 ...
Prof. Dr. Yu Chen +3 more
doaj +1 more source
CHIMIA, 2017 Nitrones are key intermediates for the total synthesis of nitrogen-containing natural products and analogues. The direct oxidation of the corresponding N,N-disubstituted hydroxylamines is one of the most straightforward methods to access such ...
Camilla Matassini, Francesca Cardona
doaj +1 more source
Tetramethylarsenverbindungen mit kovalenter Molekülstruktur
CHIMIA, 1975 The preparation and the properties of tetramethyl arsenic derivatives of some hydroxylamines [HONH2, HONHCH3, HON(CH3)2] and oximes [HON=CHCH3, HON=C(CH3)2] are described. The IR-, Raman- and 1H-NMR-spcctra of these monomeric compounds prove a non-ionic
R. Ott, J. Weidlein, K.-H. Mitschke
doaj +1 more source
RuO4-mediated oxidation of secondary amines: Part 1. Are hydroxylamines main intermediates? [PDF]
Journal of the Serbian Chemical Society, 2016 The RuO4-catalyzed oxidation of secondary amines Bn-NH-CH2R (1a-b; R=H, Me) gave mainly amides, but minute amounts of nitrones PhCH=N(O)-CH2R (9a-b) and traces of Bn-N(OH)-CH2R (R=H, 4a) were also detected.
Florea Cristina A., Petride Horia
doaj +1 more source
Molecules, 2020 Oxidative fragmentation of tertiary cyclopropanols with phenyliodine(III) dicarboxylates in aprotic solvents (dichloromethane, chloroform, toluene) produces mixed anhydrides. The fragmentation reaction is especially facile with phenyliodine(III) reagents
Dzmitry M. Zubrytski +3 more
doaj +1 more source
, 2016 Treatment of a variety of alcohols, amines, and N-hydroxylamines with 2,2,2-trifluoroethyl formate gave the corresponding formylated adducts in high ...
Chi-Nung Hsiao (1651861) +3 more
core +1 more source
Catalyst-Free Direct Olefin Halo-Hydroxylamination: Rapid Syn-thesis of Multifunctional Hydroxylamines (MFHAs) for Structurally Complex Amines and N-Heterocycles [PDF]
Herein, we introduce a novel and powerful alkene difunctionalization process where anomeric amides (e.g., N-halogenated O-activated hydroxylamines) react directly with olefins, without the use of catalysts or additives, to yield the corresponding N ...
Laszlo, Kurti +4 more
core +2 more sources