3585-90-8Relevant articles and documents
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.
Enantioselective 1,3-dipolar cycloaddition of nitrones with ethyl vinyl ether: The difference between Bronsted and Lewis acid catalysis
Jiao, Peng,Nakashima, Daisuke,Yamamoto, Hisashi
, p. 2411 - 2413 (2008/12/23)
(Chemical Equation Presented) Bronsted and Lewis face off: A new chiral N-triflyl phosphoramide is used for asymmetric 1,3-dipolar cycloaddition of diaryl nitrones to ethyl vinyl ether to give the endo products in up to 93% ee (see scheme; Tf = trifluoromethanesulfonyl; Ad = adamantyl). The structure of the chiral phosphoramide was confirmed by X-ray crystallographic analysis.
Iron and manganese (III) - Porphyrins as new applicable catalysts for selective oxidation of imines with urea-hydrogen peroxide
Karami, Bahador,Montazerozohori, Morteza,Moghadam, Majid,Farahi, Mahnaz
, p. 275 - 277 (2008/02/09)
A variety of imines were oxidised with urea-hydrogen peroxide using iron(III) and manganese (III)- tetraphenylporphyrins [Fe(TPP)Cl], [Mn(TPP)Cl] and manganese (III)-octabromotetraphenyl porphyrin [Mn(TPPBr8)Cl] as catalysts. Experimental resul