58751-78-3Relevant academic research and scientific papers
Thermal Valence Rearrangements of Heterocycles. Part 2. A New Synthetic Approach Towards the Indole Ring System
Bennett, Grace A.,Mullen, George B.,Georgiev, Vassil St.
, p. 1718 - 1721 (1989)
A new synthetic approach towards the indole ring system is described. When dimethyl 1-methyl-2-oxa-1-azaspirodec-3-ene-3,4-dicarboxylate (6) was refluxed in toluene, the previously known dimethyl 4,5,6,7-tetrahydro-1-methyl-1H-indole-2,3-dicarboxylat
Fast method for synthesis of alkyl and aryl-N-methylnitrones
Yavuz, Serkan,Ozkan, Hamdi,Colak, Naki,Yildirir, Yilmaz
experimental part, p. 6677 - 6683 (2011/10/31)
A simple, fast, efficient and eco-friendly procedure was developed for the synthesis of alkyl and aryl-N-methylnitrones. The corresponding nitrones of aromatic aldehydes, aliphatic aldehydes and alicyclic carbonyl compounds were prepared from N-methylhydr
Tin-free radical alkylation of ketones via N-silyloxy enamines
Song, Hyun-Ji,Lim, Che Jo,Lee, Sunggi,Kim, Sunggak
, p. 2893 - 2895 (2008/09/18)
The radical alkylation of ketones is achieved by their conversion into corresponding N-silyloxy enamines, followed by a radical reaction with alkyl halides bearing electron-withdrawing groups. The Royal Society of Chemistry 2006.
Regiochemistry of mercury(II) oxide oxidation of unsymmetrical N,N-disubstituted hydroxylamines
Ali, Sk. Asrof,Hashmi, S. M. Azhar,Siddiqui, Mohammad N.,Wazeer, Mohammed I. M.
, p. 14917 - 14928 (2007/10/03)
Mercury(II) oxide oxidation of N,N-disubstituted hydroxylamines with the α and α' carbon atoms containing one and two hydrogen atoms, respectively, gave aldonitrones in a highly regioselective manner. Removal of the α proton is involved in the rate determining step as shown by primary kinetic isotope effect.
Reaction of Oximes with Dimethyl Carbonate: A New Entry to 3-Methyl-4,5-disubstituted-4-oxazolin-2-ones
Marques, C. A.,Selva, M.,Tundo, P.,Montanari, F.
, p. 5765 - 5770 (2007/10/02)
The reaction of ketone oximes with dimethyl carbonate (DMC) carried out in an autoclave at 180-190 deg C and in the presence of K2CO3 yields 3-methyl-4,5-disubstituted-4-oxazolin-2-ones.The reaction can be applied to both aliphatic and aromatic ketone oximes, provided that a methylene group be present near the C=N bond.Nonoptimized yields range from 22 to 48percent.The reaction seems to be a sigmatropic rearrangement where DMC plays a key role in causing the initial N-methylation of the oximes.
A CONVENIENT SYNTHESIS OF NITRONES BY N-ALKYLATION OF O-TRIMETHYLSILYLOXIMES
LeBel, Norman A.,Balasubramanian, N.
, p. 4331 - 4334 (2007/10/02)
Aldoxime and ketoxime-O-trimethylsilyl ethers can be alkylated with trialkyl-oxonium tetrafluoroborates and alkyl triflates at or below room temperature to produce nitrones in good yields.
α-Oxygenation of Aldehydes and Cyclic Ketones by Acylation-Rearrangement of Nitrones
Cummins, Clark H.,Coates, Robert M.
, p. 2070 - 2076 (2007/10/02)
The reaction of N-tert-butylnitrones (1a-e) of aldehydes and N-methylnitrones (2 and 3) of cyclic ketones with acid chlorides in the presence of triethylamine afforded α-acyloxy imines by rearrangement of N-vinyl-O-acylhydroxylamine intermediates.Hydrolysis of the α-acyloxy imines gave α-acyloxy aldehydes and ketones.The acylation-rearrangement reaction offers a new method for α-oxygenation of carbonyl compounds.
