WebFeb 15, 2024 · The Beckmann rearrangement of acetophenone oxime 1a to N-phenylacetamide (2a) was chosen as model for the reaction. In a typical experiment, DMF as solvent was pumped through the photoreactor with constant flow rate (initial experiments using MeCN as solvent and substoichiometric amounts of DMF 17 provided very poor …
under liquid-phase conditions - Traduction en français - exemples ...
WebTraductions en contexte de "under liquid-phase conditions" en anglais-français avec Reverso Context : These metals are supported on supports that exhibit acidity or the reaction is conducted under liquid-phase conditions at acidic pHs. WebFeb 1, 2014 · For instance, the Beckmann rearrangement of cyclohexanone oxime was completely performed under the influence of 0.5 mol % of cyanuric chloride (CNC) or phosphazene (1,3,5-triazo-2,4,6 ... restaurants near obetz ohio
AN EFFICIENT PROCESS FOR THE SYNTHESIS OF CYCLIC AMIDES
WebOct 12, 2013 · Abstract. A catalytic system, including trifluoroacetic acid and organic solvent additives, was applied to carry out the Beckmann rearrangement of cyclohexanone oxime … The Beckmann rearrangement, named after the German chemist Ernst Otto Beckmann (1853–1923), is a rearrangement of an oxime functional group to substituted amides. The rearrangement has also been successfully performed on haloimines and nitrones. Cyclic oximes and haloimines yield … See more The most common reaction mechanism of the Beckmann rearrangement consists generally of an alkyl migration anti-periplanar to the expulsion of a leaving group to form a nitrilium ion. This is followed by See more The Beckmann fragmentation is a reaction that frequently competes with the Beckmann rearrangement. When the group α to the oxime is capable of stabilizing carbocation formation, the fragmentation becomes a viable reaction pathway. The … See more An industrial synthesis of paracetamol developed by Hoechst–Celanese involves the conversion of a methyl ketone to an acetanilide via a … See more • Curtius rearrangement • Dakin reaction • Schmidt reaction • Stieglitz rearrangement • Lossen rearrangement See more Beckmann rearrangement can be rendered catalytic using cyanuric chloride and zinc chloride as a co-catalyst. For example, cyclododecanone can be converted to the corresponding See more The oxime of cyclohexenone with acid forms aniline in a dehydration – aromatization reaction called the Semmler–Wolff reaction or Wolff aromatization See more • Animation of the Beckmann rearrangement • Animation of the Beckmann rearrangement (caprolactam) See more WebBoth Beckmann and Schmidt reactions on chromanone give mainly (369). The Schmidt reaction of chromanones, flavanones and isoflavanones also produces the 1,5-benzoxazepinone (370); for example, with isoflavanone the product ratio (369) : (370) is ca. 2 〈71G167〉. The Beckmann rearrangement of xanthone oxime gives dibenz[b,f][1,4 restaurants near ocean bay gambia