67036-01-5Relevant academic research and scientific papers
Single-Step Approach toward Nitrones via Pyridinium Ylides: The DMAP-Catalyzed Reaction of Benzyl Halides with Nitrosoarenes
Jung, Yeonghun,Hong, Jee Eun,Kwak, Jae-Hwan,Park, Yohan
, p. 6343 - 6350 (2021/05/29)
A single-step approach is reported for the preparation of nitrones from benzyl halides and nitrosoarenes via pyridinium ylides, utilizing 4-dimethylaminopyridine (DMAP) catalyst and mild reaction conditions (Li2CO3, dimethylacetamide, and room temperature). The reaction provides both keto-and aldonitrones in high yields with a wide scope for benzyl halides and nitrosoarenes. In the same reaction system, 2-methyl-2-nitrosopropane, which does not have an aryl group, also affords the corresponding N-tert-butyl nitrones from primary benzyl bromides that have an electron-withdrawing group. As an application of the reaction, methyl 2-bromo-2-phenylacetate was used to prepare the corresponding isoxazolidine by a sequential one-pot synthesis.
A novel route to substituted 4-methylene-4,5-dihydroisoxazoles mediated by hafnium(IV) chloride
Dunn,Graham,Grigg,Higginson,Sridharan,Thornton-Pett
, p. 1968 - 1969 (2007/10/03)
Heating alkyl vinyl ketones and N-tert-butylarylmethylide-neamine N-oxides in the presence of HfCl4 results in the formation of 4-methylene-4,5-dihydroisoxazoles in good yield.
Nitrone derivatives
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, (2008/06/13)
A compound represented by the figure (1) or a pharmaceutically acceptable salt thereof is useful as medicament for treating retinal degenerative disorders: wherein Ar is optionally substitued phenyl or optionally substituted heteroaryl;. n is 0, 1 or 2; W
Synthesis and Characterization of Phenyl-Substituted C-Phenyl-N-tert-butylnitrones and Some of Their Radical Adducts
Hinton, Randall D.,Janzen, Edward, G.
, p. 2646 - 2651 (2007/10/02)
Synthesis of C-phenyl-N-tert-butylnitrone (PBN) and several of its analogues with substituents in the 2-, 3-, or 4-position on the phenyl ring is described.While a one-pot reduction/condensation method proved suitable for the most compounds, it was necessary to prepare some examples by direct condensation or through oxidation of the appropriate imine.The 1H NMR data for the 3-X- and 4-X-PBN's can be correlated with the Hammett equation.For the 3-X series Δδ for the α-proton correlates best with ?+ and has a correlation coefficient of 0.90.For the 4-X series a dual substituent parameter equation using ?R0 gives the best correlation with r = 0.99.The hyperfine splitting constants (hfsc's) of HO and HOO adducts of serveral substituted PBN's are also included and their correlation with the Hammett equation is discussed.
